WO2014129268A1 - 液晶性化合物、液晶組成物および液晶表示素子 - Google Patents
液晶性化合物、液晶組成物および液晶表示素子 Download PDFInfo
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Definitions
- the present invention relates to a liquid crystal compound, a liquid crystal composition, and a liquid crystal display element. More specifically, the present invention relates to a compound having difluoromethyleneoxy, a liquid crystal composition containing this compound and having a nematic phase, and a liquid crystal display device including the composition.
- Liquid crystal display elements are widely used for displays such as personal computers and televisions. This element utilizes the optical anisotropy and dielectric anisotropy of a liquid crystalline compound.
- a PC phase change
- TN twisted nematic
- STN super twisted nematic
- BTN bistable twisted nematic
- ECB electrically controlled birefringence
- OCB optically
- compensated bend) mode IPS (in-plane switching) mode
- VA vertical alignment
- FFS far field switching
- PSA polymer sustained alignment
- liquid crystal composition having appropriate physical properties is used.
- the liquid crystal compound contained in the composition has physical properties shown in the following (1) to (8).
- (1) High stability to heat, light, etc. (2) High clearing point (3) Low minimum temperature of liquid crystal phase (4) Small viscosity ( ⁇ ) (5) Appropriate optical anisotropy ( ⁇ n) (6) Large dielectric anisotropy ( ⁇ ) (7) Appropriate elastic constant (K) (8) Excellent compatibility with other liquid crystal compounds (9) Large dielectric constant in the minor axis direction ( ⁇ )
- the effect of the physical properties of the liquid crystal compound on the characteristics of the device is as follows.
- a compound having high stability against heat, light, etc. increases the voltage holding ratio of the device. This increases the lifetime of the device.
- a compound having a high clearing point as in (2) widens the usable temperature range of the device.
- a compound having a lower minimum temperature of the liquid crystal phase such as a nematic phase or a smectic phase, particularly a lower minimum temperature of the nematic phase also extends the usable temperature range of the device.
- a compound having a small viscosity shortens the response time of the device.
- a compound having an appropriate optical anisotropy improves the contrast of the device.
- a compound having a large optical anisotropy or a small optical anisotropy that is, an appropriate optical anisotropy is required.
- a compound having a large dielectric anisotropy as in (6) lowers the threshold voltage of the device. This reduces the power consumption of the element.
- a compound having a small dielectric anisotropy shortens the response time of the device by reducing the viscosity of the composition.
- a compound having a large elastic constant shortens the response time of the device.
- a compound having a small elastic constant lowers the threshold voltage of the device. Therefore, an appropriate elastic constant is required according to the characteristics to be improved.
- a compound having excellent compatibility with other liquid crystal compounds as in (8) is preferred. This is because liquid crystal compounds having different physical properties are mixed to adjust the physical properties of the composition.
- the transmittance of the liquid crystal composition used in the FFS mode liquid crystal display element correlates with the dielectric constant ( ⁇ ) in the minor axis direction of the liquid crystal composition, as shown in (9)
- a liquid crystalline compound having a large dielectric constant in the minor axis direction is preferred.
- the first object of the present invention is high stability to light, high clearing point, low minimum temperature of liquid crystal phase, small viscosity, appropriate optical anisotropy, large dielectric anisotropy, large dielectric in the short axis direction. It is to provide a liquid crystal compound satisfying at least one of physical properties such as a ratio, an appropriate elastic constant, and excellent compatibility with other liquid crystal compounds. In particular, it is to provide a compound having both a large dielectric anisotropy and a large dielectric constant in the minor axis direction.
- the second problem is that the compound contains this compound and has a high maximum temperature of the nematic phase, a low minimum temperature of the nematic phase, a small viscosity, a suitable optical anisotropy, a large dielectric anisotropy, and a large dielectric in the minor axis direction. It is to provide a liquid crystal composition satisfying at least one of physical properties such as a rate and an appropriate elastic constant. An object of the present invention is to provide a liquid crystal composition having an appropriate balance regarding at least two physical properties.
- a third problem is to provide a liquid crystal display device comprising this composition and having a wide temperature range in which the device can be used, a short response time, a large voltage holding ratio, a low threshold voltage, a large contrast ratio, and a long lifetime. That is.
- the present invention relates to a compound represented by the formula (1), a liquid crystal composition containing the compound, and a liquid crystal display device including the composition.
- R 1 is alkyl having 1 to 15 carbon atoms, in which at least one —CH 2 — may be replaced by —O— or —S—, and at least one — (CH 2 ) 2 — May be replaced by —CH ⁇ CH—, in which at least one hydrogen may be replaced by a halogen;
- Ring A 1 , Ring A 2 , Ring A 3 , and Ring A 4 are independently 1,4-cyclohexylene, 1,4-cyclohexenylene, 1,4-phenylene, 2-fluoro-1,4 -Phenylene, 2,6-difluoro-1,4-phenylene, 2-chloro-1,4-phenylene, 2,6-dichloro-1,4-phenylene, 2-chloro-6-fluoro-1,4-phenylene Tetrahydropyran-2,5-d
- L 1 and L 2 are independently hydrogen or fluorine
- Y 1 and Y 2 are independently fluorine or chlorine
- W 1 represents a single bond, — (CH 2 ) 2 —, —CH ⁇ CH—, —C ⁇ C—, —COO—, —OCO—, —CH 2 O—, —OCH 2 —, or —CF ⁇ .
- Z 1 , Z 2 , Z 3 , and Z 4 are each independently a single bond, — (CH 2 ) 2 —, —CH ⁇ CH—, —C ⁇ C—, —COO—, —OCO—, —CF 2 O—, —CH 2 O—, —OCH 2 —, or —CF ⁇ CF—, a, b, c, and d are independently 0 or 1, and the sum of a, b, c, and d is 1, 2, or 3; At least one of Z 1 when a is 1, Z 2 when b is 1, Z 3 when c is 1, and Z 4 when d is 1 is —CF 2 O—. .
- the first advantage of the present invention is high stability to light, high clearing point, low minimum temperature of liquid crystal phase, small viscosity, appropriate optical anisotropy, large dielectric anisotropy, appropriate elastic constant, etc. It is to provide a liquid crystal compound satisfying at least one of physical properties such as excellent compatibility with the liquid crystal compound and a large dielectric constant in the minor axis direction. In particular, it is to provide a compound having both a large dielectric anisotropy and a large dielectric constant in the minor axis direction.
- the second advantage is that it contains this compound and has a high maximum temperature of the nematic phase, a low minimum temperature of the nematic phase, a small viscosity, a suitable optical anisotropy, a large dielectric anisotropy, and a large dielectric in the minor axis direction. It is to provide a liquid crystal composition satisfying at least one of physical properties such as a rate and an appropriate elastic constant.
- the third advantage is to provide a liquid crystal display device comprising this composition and having a wide temperature range in which the device can be used, a short response time, a large voltage holding ratio, a low threshold voltage, a large contrast ratio, and a long lifetime. That is.
- the liquid crystalline compound has a liquid crystal phase such as a nematic phase and a smectic phase, and does not have a liquid crystal phase, but the purpose is to adjust the physical properties of the composition such as the maximum temperature, minimum temperature, viscosity, and dielectric anisotropy.
- a general term for compounds added in These compounds have, for example, a six-membered ring such as 1,4-cyclohexylene and 1,4-phenylene, and the molecular structure is rod-like.
- a liquid crystal composition is prepared by mixing such liquid crystal compounds. The ratio (content) of the liquid crystal compound is expressed as a percentage by weight (% by weight) based on the weight of the liquid crystal composition.
- a liquid crystal display element is a general term for a liquid crystal display panel and a liquid crystal display module.
- a liquid crystal compound, a liquid crystal composition, and a liquid crystal display element may be abbreviated as a compound, a composition, and an element, respectively.
- the clearing point is a liquid crystal phase-isotropic phase transition temperature in the liquid crystal compound.
- the lower limit temperature of the liquid crystal phase is the transition temperature of the solid-liquid crystal phase (smectic phase, nematic phase, etc.) in the liquid crystal compound.
- the upper limit temperature of the nematic phase is a transition temperature between the nematic phase and the isotropic phase in the liquid crystal composition, and may be abbreviated as the upper limit temperature.
- the lower limit temperature of the nematic phase may be abbreviated as the lower limit temperature.
- the compound represented by Formula (1) may be abbreviated as Compound (1). This abbreviation may also apply to compounds represented by formula (2) and the like.
- symbols such as A 1 , B 1 , and C 1 surrounded by hexagons correspond to the ring A 1 , the ring B 1 , the ring C 1, and the like, respectively.
- the symbol for the terminal group R 11 was used for several compounds. In these compounds, two groups represented by any two R 11 may be the same or different. For example, there is a case where R 11 of compound (2) is ethyl and R 11 of compound (3) is ethyl. In some cases, R 11 of compound (2) is ethyl and R 11 of compound (3) is propyl.
- This rule also applies to other end groups, symbols such as rings.
- symbols such as rings.
- formula (5) when i is 2, there are two rings C 1 .
- the two groups represented by the two rings C 1 may be the same or different.
- This rule also applies to any two when i is greater than 2.
- This rule also applies to symbols such as other rings and linking groups.
- the expression “at least one“ A ”may be replaced by“ B ”” means that when the number of “A” is one, the position of “A” is arbitrary, and the number of “A” is two. Even when there are more than two, it means that their positions can be selected without limitation.
- the expression “at least one A may be replaced by B, C or D” means that any A is replaced by B, any A is replaced by C, and any A is D When replaced, it means that a plurality of A are further replaced by at least two of B, C, and D.
- alkyl in which at least one —CH 2 — may be replaced by —O— or —CH ⁇ CH— includes alkyl, alkenyl, alkoxy, alkoxyalkyl, alkoxyalkenyl, alkenyloxyalkyl. Note that it is not preferable that two consecutive —CH 2 — are replaced by —O— to form —O—O—. In alkyl and the like, it is not preferable that —CH 2 — in the methyl moiety (—CH 2 —H) is replaced by —O— to become —O—H.
- 2-Fluoro-1,4-phenylene means the following two divalent groups.
- fluorine may be leftward (L) or rightward (R). This rule also applies to asymmetric divalent rings such as tetrahydropyran-2,5-diyl.
- the present invention includes the contents described in the following items 1 to 14.
- R 1 is alkyl having 1 to 15 carbon atoms, in which at least one —CH 2 — may be replaced by —O— or —S—, and at least one — (CH 2 ) 2 — May be replaced by —CH ⁇ CH—, in which at least one hydrogen may be replaced by a halogen;
- Ring A 1 , Ring A 2 , Ring A 3 , and Ring A 4 are independently 1,4-cyclohexylene, 1,4-cyclohexenylene, 1,4-phenylene, 2-fluoro-1,4 -Phenylene, 2,6-difluoro-1,4-phenylene, 2-chloro-1,4-phenylene, 2,6-dichloro-1,4-phenylene, 2-chloro-6-fluoro-1,4-phenylene Tetrahydropyran-2,5-diyl, 1,3-dioxane-2,5-diyl, 2,6,7-trifluoro-1,4-phenylene Te
- L 1 and L 2 are independently hydrogen or fluorine
- Y 1 and Y 2 are independently fluorine or chlorine
- W 1 represents a single bond, — (CH 2 ) 2 —, —CH ⁇ CH—, —C ⁇ C—, —COO—, —OCO—, —CH 2 O—, —OCH 2 —, or —CF ⁇ .
- Z 1 , Z 2 , Z 3 , and Z 4 are each independently a single bond, — (CH 2 ) 2 —, —CH ⁇ CH—, —C ⁇ C—, —COO—, —OCO—, —CF 2 O—, —CH 2 O—, —OCH 2 —, or —CF ⁇ CF—;
- a, b, c, and d are independently 0 or 1, and the sum of a, b, c, and d is 1, 2, or 3; At least one of Z 1 when a is 1, Z 2 when b is 1, Z 3 when c is 1, and Z 4 when d is 1 is —CF 2 O—. .
- R 1 is alkyl having 1 to 15 carbons, alkenyl having 2 to 15 carbons, alkoxy having 1 to 14 carbons, or alkenyloxy having 2 to 14 carbons.
- X 1 is fluorine, chlorine, —C ⁇ N, —N ⁇ C ⁇ S, —CH 2 F, —CHF 2 , —CF 3 , — (CH 2 ) 2 —F, —CH 2 CF 3 , — CF 2 CF 3 , — (CH 2 ) 3 —F, — (CH 2 ) 2 —CF 3 , — (CF 2 ) 3 —F, — (CH 2 ) 4 —F, — (CH 2 ) 3 —CF 3 , — (CF 2 ) 4 —F, — (CF 2 ) 5 —F, — (CF 2 ) 6 —F, — (CF 2 ) 7 —F, —OCH 2 F, —OCHF
- R 1 is alkyl having 1 to 10 carbons, alkenyl having 2 to 10 carbons, alkoxy having 1 to 9 carbons, or alkenyloxy having 2 to 9 carbons.
- R 1 is alkyl having 1 to 10 carbons, alkenyl having 2 to 10 carbons, or alkoxy having 1 to 9 carbons
- Ring A 1 , Ring A 2 , Ring A 3 , and Ring A 4 are independently 1,4-cyclohexylene, 1,4-cyclohexenylene, 1,4-phenylene, 2-fluoro-1,4 -Phenylene, 2,6-difluoro-1,4-phenylene, tetrahydropyran-2,5-diyl, or 1,3-dioxane-2,5-diyl
- Z 1, Z 2, Z 3 , and Z 4 are independently a single bond, - (CH 2) 2 - , - COO -, - CF 2 O -, - CH 2 O-, or -OCH 2 - with Yes
- W 1 is a single bond, - (CH 2) 2 - , - COO -, - CF 2 O -, - CH 2 O
- R 1 is alkyl having 1 to 10 carbons, alkenyl having 2 to 10 carbons, or alkoxy having 1 to 9 carbons
- Ring A 1 , Ring A 2 , Ring A 3 , and Ring A 4 are independently 1,4-cyclohexylene, 1,4-cyclohexenylene, 1,4-phenylene, 2-fluoro-1,4 -Phenylene, 2,6-difluoro-1,4-phenylene, tetrahydropyran-2,5-diyl, or 1,3-dioxane-2,5-diyl
- X 1 is fluorine, —CF 3 , or —OCF 3
- L 1 and L 2 are independently hydrogen or fluorine.
- Item 6 The compound according to item 1, represented by any one of formulas (1-13) to (1-22): In the formulas (1-13) to (1-22), R 1 is alkyl having 1 to 10 carbons, alkenyl having 2 to 10 carbons, or alkoxy having 1 to 9 carbons; X 1 is fluorine, —CF 3 , or —OCF 3 ; L 1 , L 2 , L 3 , L 4 , L 5 , and L 6 are independently hydrogen or fluorine.
- Item 7. The compound according to item 1, represented by any one of formulas (1-23) to (1-25): In the formulas (1-23) to (1-25), R 1 is alkyl having 1 to 10 carbons, alkenyl having 2 to 10 carbons, or alkoxy having 1 to 9 carbons; X 1 is fluorine, -CF 3 or -OCF 3 ; L 1 , L 2 , and L 3 are independently hydrogen or fluorine.
- Item 8 A liquid crystal composition containing at least one of the compounds according to any one of items 1 to 7.
- Item 9. The liquid crystal composition according to item 8, further comprising at least one compound selected from the group of compounds represented by formulas (2) to (4):
- R 11 is alkyl having 1 to 10 carbons or alkenyl having 2 to 10 carbons, in which at least one hydrogen may be replaced by fluorine, and at least one —CH 2 — is — May be replaced by O-;
- X 11 is fluorine, chlorine, —OCF 3 , —OCHF 2 , —CF 3 , —CHF 2 , —CH 2 F, —OCF 2 CHF 2 , or —OCF 2 CHFCF 3 ;
- Ring B 1 , Ring B 2 , and Ring B 3 are independently 1,4-cyclohexylene, 1,4-phenylene, 2-fluoro-1,4-phenylene, 2,6-difluoro-1,4- Phenylene, tetrahydropyran-2,5-diyl, 1,3-dioxan
- Item 10 The liquid crystal composition according to item 8 or 9, further comprising at least one compound selected from the group of compounds represented by formula (5).
- R 12 is alkyl having 1 to 10 carbons or alkenyl having 2 to 10 carbons, in which at least one hydrogen may be replaced by fluorine, and at least one —CH 2 — is — May be replaced by O-;
- X 12 is —C ⁇ N or —C ⁇ C—C ⁇ N;
- Ring C 1 is 1,4-cyclohexylene, 1,4-phenylene, 2-fluoro-1,4-phenylene, 2,6-difluoro-1,4-phenylene, tetrahydropyran-2,5-diyl, 1 , 3-dioxane-2,5-diyl, or pyrimidine-2,5-diyl;
- Z 14 is a single bond, -CH 2 CH 2 -, - C ⁇ C -, - COO -, - CF 2
- Item 11 The liquid crystal composition according to any one of items 8 to 10, further containing at least one compound selected from the group of compounds represented by formulas (6) to (12).
- R 13 and R 14 are independently alkyl having 1 to 10 carbons or alkenyl having 2 to 10 carbons, and in the alkyl and alkenyl, at least one —CH 2 — may be replaced by —O—.
- R 15 is hydrogen, fluorine, alkyl having 1 to 10 carbons, or alkenyl having 2 to 10 carbons, and in the alkyl and alkenyl, at least one —CH 2 — may be replaced by —O—.
- At least one hydrogen may be replaced by fluorine;
- S 11 is hydrogen or methyl;
- X is —CF 2 —, —O—, or —CHF—;
- Ring D 1 , Ring D 2 , Ring D 3 , and Ring D 4 are independently 1,4-cyclohexylene, 1,4-cyclohexenylene, wherein at least one hydrogen may be replaced with fluorine, 4-phenylene, tetrahydropyran-2,5-diyl, or decahydronaphthalene-2,6-diyl;
- Ring D 5 and Ring D 6 are independently 1,4-cyclohexylene, 1,4-cyclohexenylene, 1,4-phenylene, tetrahydropyran-2,5-diyl, or decahydronaphthalene-2,6 -Is diyl;
- Z 15, Z 16, Z 17 , and Z 18 are independently a single bond, -CH 2 CH 2 -, - COO -
- Item 12. The liquid crystal composition according to any one of items 8 to 11, further comprising at least one compound selected from the group of compounds represented by formulas (13) to (15).
- R 16 and R 17 are independently alkyl having 1 to 10 carbons or alkenyl having 2 to 10 carbons, and in the alkyl and alkenyl, at least one —CH 2 — may be replaced by —O—.
- Ring E 1 , Ring E 2 , Ring E 3 , and Ring E 4 are independently 1,4-cyclohexylene, 1,4-phenylene, 2-fluoro-1,4-phenylene, 2,5-difluoro- 1,4-phenylene or pyrimidine-2,5-diyl;
- Z 19 , Z 20 and Z 21 are each independently a single bond, —CH 2 CH 2 —, —CH ⁇ CH—, —C ⁇ C—, or —COO—.
- Item 13 The liquid crystal composition according to item 8 to 12, further comprising at least one of a polymerizable compound, an optically active compound, an antioxidant, an ultraviolet absorber, a light stabilizer, a heat stabilizer, and an antifoaming agent.
- Item 14 A liquid crystal display device comprising the liquid crystal composition according to any one of items 8 to 13.
- R 1 is alkyl having 1 to 15 carbon atoms, in which at least one —CH 2 — may be replaced by —O— or —S—, and at least one — (CH 2 ) 2 — May be replaced with —CH ⁇ CH—, in which at least one hydrogen may be replaced with a halogen.
- terminal groups R 1 are alkyl, alkoxy, alkoxyalkyl, alkoxyalkoxy, alkylthio, alkylthioalkoxy, alkenyl, alkenyloxy, alkenyloxyalkyl, alkoxyalkenyl and alkenylthio.
- at least one hydrogen may be replaced with a halogen.
- Preferred halogens are fluorine and chlorine.
- a more preferred halogen is fluorine.
- These groups are linear or branched and do not include cyclic groups such as cyclohexyl. In these groups, a straight chain is preferable to a branched chain.
- —CH ⁇ CH— in alkenyl depends on the position of the double bond. —CH ⁇ CHCH 3 , —CH ⁇ CHC 2 H 5 , —CH ⁇ CHC 3 H 7 , —CH ⁇ CHC 4 H 9 , —C 2 H 4 CH ⁇ CHCH 3 , and —C 2 H 4 CH ⁇ CHC 2
- the trans configuration is preferable.
- -CH 2 CH CHCH 3
- An alkenyl compound having a preferred configuration has a high clearing point or a wide temperature range of a liquid crystal phase.
- Mol. Cryst. Liq. Cryst., 1985, 131, 109 and Mol. Cryst. Liq. Cryst., 1985, 131, 327 have detailed descriptions.
- alkyl examples include —CH 3 , —C 2 H 5 , —C 3 H 7 , —C 4 H 9 , —C 5 H 11 , —C 6 H 13 , —C 7 H 15 , —C 8 H 17 , -C 9 H 19 , -C 10 H 21 , -C 11 H 23 , -C 12 H 25 , -C 13 H 27 , -C 14 H 29 , and -C 15 H 31 .
- alkoxy examples include —OCH 3 , —OC 2 H 5 , —OC 3 H 7 , —OC 4 H 9 , —OC 5 H 11 , —OC 6 H 13 , —OC 7 H 15 , —OC 8 H 17 , -OC 9 H 19 , -OC 10 H 21 , -OC 11 H 23 , -OC 12 H 25 , -OC 13 H 27 , and -OC 14 H 29 .
- alkoxyalkyl examples include —CH 2 OCH 3 , —CH 2 OC 2 H 5 , —CH 2 OC 3 H 7 , — (CH 2 ) 2 —OCH 3 , — (CH 2 ) 2 —OC 2 H 5 , — (CH 2 ) 2 —OC 3 H 7 , — (CH 2 ) 3 —OCH 3 , — (CH 2 ) 4 —OCH 3 , and — (CH 2 ) 5 —OCH 3 .
- alkenyl examples include —CH ⁇ CH 2 , —CH ⁇ CHCH 3 , —CH 2 CH ⁇ CH 2 , —CH ⁇ CHC 2 H 5 , —CH 2 CH ⁇ CHCH 3 , — (CH 2 ) 2 —CH ⁇ . CH 2 , —CH ⁇ CHC 3 H 7 , —CH 2 CH ⁇ CHC 2 H 5 , — (CH 2 ) 2 —CH ⁇ CHCH 3 , and — (CH 2 ) 3 —CH ⁇ CH 2 .
- alkenyloxy examples are —OCH 2 CH ⁇ CH 2 , —OCH 2 CH ⁇ CHCH 3 , and —OCH 2 CH ⁇ CHC 2 H 5 .
- alkyl in which at least one hydrogen is replaced by halogen examples include —CH 2 F, —CHF 2 , —CF 3 , — (CH 2 ) 2 —F, —CF 2 CH 2 F, —CF 2 CHF 2 , —CH 2 CF 3 , —CF 2 CF 3 , — (CH 2 ) 3 —F, — (CF 2 ) 3 —F, —CF 2 CHFCF 3 , —CHFCF 2 CF 3 , — (CH 2 ) 4 —F , — (CF 2 ) 4 —F, — (CH 2 ) 5 —F, — (CF 2 ) 5 —F, —CH 2 Cl, —CHCl 2 , —CCl 3 , — (CH 2 ) 2 —Cl, -CCl 2 CH 2 Cl, -CCl 2 CHCl 2 , -CH 2 CCl 3 , -CCl 2 CCl 3 ,-(
- alkoxy in which at least one hydrogen is replaced by halogen examples include —OCH 2 F, —OCHF 2 , —OCF 3 , —O— (CH 2 ) 2 —F, —OCF 2 CH 2 F, —OCF 2 CHF 2 , —OCH 2 CF 3 , —O— (CH 2 ) 3 —F, —O— (CF 2 ) 3 —F, —OCF 2 CHFCF 3 , —OCHFCF 2 CF 3 , —O (CH 2 ) 4 — F, —O— (CF 2 ) 4 —F, —O— (CH 2 ) 5 —F, —O— (CF 2 ) 5 —F, —OCH 2 Cl, —OCHCl 2 , —OCCl 3 , —O — (CH 2 ) 2 —Cl, —OCCl 2 CHCl 2 , —OCH 2 CC
- R 1 are alkyl having 1 to 15 carbons, alkenyl having 2 to 15 carbons, and alkoxy having 2 to 15 carbons. More preferred examples of R 1 are alkyl having 1 to 10 carbons and alkenyl having 2 to 10 carbons.
- R 1 include —CH 3 , —C 2 H 5 , —C 3 H 7 , —C 4 H 9 , —C 5 H 11 , —C 6 H 13, —C 7 H 15 , —CH ⁇ CH 2 , —CH ⁇ CHCH 3 , —CH 2 CH ⁇ CH 2 , —CH ⁇ CHC 2 H 5 , —CH 2 CH ⁇ CHCH 3 , — (CH 2 ) 2 —CH ⁇ CH 2 , —CH ⁇ CHC 3 H 7 , —CH 2 CH ⁇ CHC 2 H 5 , — (CH 2 ) 2 —CH ⁇ CHCH 3 , and — (CH 2 ) 3 —CH ⁇ CH 2 .
- ring A 1 , ring A 2 , ring A 3 , and ring A 4 are independently 1,4-cyclohexylene, 1,4-cyclohexenylene, 1,4-phenylene, 2 -Fluoro-1,4-phenylene, 2,6-difluoro-1,4-phenylene, 2-chloro-1,4-phenylene, 2,6-dichloro-1,4-phenylene, 2-chloro-6-fluoro -1,4-phenylene, tetrahydropyran-2,5-diyl, 1,3-dioxane-2,5-diyl, 2,6,7-trioxabicyclo [2.2.2] octane-1,4- Diyl, pyrimidine-2,5-diyl, or pyridine-2,5-diyl.
- Preferred examples of ring A 1 , ring A 2 , ring A 3 , or ring A 4 include 1,4-cyclohexylene, 1,4-cyclohexenylene, 1,4-phenylene, 2-fluoro-1,4. -Phenylene, 2,6-difluoro-1,4-phenylene, tetrahydropyran-2,5-diyl, 1,3-dioxane-2,5-diyl, 2,6,7-trioxabicyclo [2.2. 2] Octane-1,4-diyl. 1,4-Cyclohexylene has cis and trans configurations. From the viewpoint of a high maximum temperature, a transformer arrangement is preferable.
- 2-Fluoro-1,4-phenylene (A-1 and A-2) is not symmetrical.
- the chemical formula there are a case where fluorine is located on the right end group side (right direction; A-1) and a case where fluorine is located on the left end group side (left direction; A-2).
- Preferred 2-fluoro-1,4-phenylene is (rightward; A-1) for increasing the dielectric anisotropy.
- Tetrahydropyran-2,5-diyl (A-11 and A-12) is not symmetrical. There are cases where —O— is located on the right end group side (rightward; A-11) and cases where it is located on the left end group side (leftward; A-12). Rightward (A-11) is preferable from the viewpoint of large dielectric anisotropy, and leftward (A-12) is preferable from the viewpoint of large dielectric constant in the minor axis direction.
- 1,3-dioxane-2,5-diyl (A-13 and A-14), 2,6,7-trioxabicyclo [2.2.2] octane-1,4-diyl (A-15 and A -16), pyrimidine-2,5-diyl (A-17 and A-18), and pyridine-2,5-diyl (A-19 and A-20) to increase the dielectric anisotropy Further, it is preferable to face right (A-13, A-15, A-17, and A-19).
- ring A 1 , ring A 2 , ring A 3 , and ring A 4 are 1,4-cyclohexylene and 1,4-phenylene.
- the linking group W 1 is a single bond, — (CH 2 ) 2 —, —CH ⁇ CH—, —C ⁇ C—, —COO—, —OCO—, —CH 2 O—, — OCH 2 — or —CF ⁇ CF—.
- Preferred examples of W 1 are a single bond, — (CH 2 ) 2 —, —COO—, —CH 2 O—, and —OCH 2 —.
- a more preferred example of W 1 is a single bond.
- the linking groups Z 1 , Z 2 , Z 3 , and Z 4 are independently a single bond, — (CH 2 ) 2 —, —CH ⁇ CH—, —C ⁇ C—, —COO. —, —OCO—, —CF 2 O—, —CH 2 O—, —OCH 2 —, or —CF ⁇ CF—, Z 1 when a is 1, Z 2 when b is 1, At least one of Z 3 when c is 1 and Z 4 when d is 1 is —CF 2 O—.
- Z 1, Z 2, Z 3 , and Z 4 is a single bond, - (CH 2) 2 - , - COO -, - CF 2 O -, - CH 2 O-, and -OCH 2 - with is there. More preferred examples of Z 1 , Z 2 , Z 3 , and Z 4 are a single bond and —CF 2 O—.
- the terminal group X 1 is halogen, —C ⁇ N, —N ⁇ C ⁇ S, or alkyl having 1 to 10 carbon atoms in which at least one hydrogen is replaced by fluorine, and at least one hydrogen.
- alkyl in which at least one hydrogen is replaced by fluorine examples include —CH 2 F, —CHF 2 , —CF 3 , — (CH 2 ) 2 —F, —CF 2 CH 2 F, —CF 2 CHF 2 , —CH 2 CF 3 , —CF 2 CF 3 , — (CH 2 ) 3 —F, — (CF 2 ) 2 —CF 3 , —CF 2 CHFCF 3 , —CHFCF 2 CF 3 , — (CH 2 ) 4 — F, — (CF 2 ) 3 —CF 3 , — (CH 2 ) 5 —F, and — (CF 2 ) 4 —CF 3 .
- alkoxy in which at least one hydrogen is replaced by fluorine examples include —OCH 2 F, —OCHF 2 , —OCF 3 , —O— (CH 2 ) 2 —F, —OCF 2 CH 2 F, —OCF 2 CHF 2 , —OCH 2 CF 3 , —O— (CH 2 ) 3 —F, —O— (CF 2 ) 2 —CF 3 , —OCF 2 CHFCF 3 , —OCHFCF 2 CF 3 , —O— (CH 2 ) 4- F, —O— (CF 2 ) 3 —CF 3 , —O— (CH 2 ) 5 —F, and —O— (CF 2 ) 4 —CF 3 .
- Preferred examples of X 1 include fluorine, chlorine, —C ⁇ N, —N ⁇ C ⁇ S, —CH 2 F, —CHF 2 , —CF 3 , — (CH 2 ) 2 —F, —CH 2 CF 3.
- X 1 More preferred examples of X 1 include fluorine, chlorine, —C ⁇ N, —CHF 2 , —CF 3 , —OCHF 2 , —OCF 3 , —CH ⁇ CHCF 3 , —CF ⁇ CHCF 3 , and —CF ⁇ CFCF. 3 .
- the most preferred examples of X 1 are fluorine, —CF 3 , and —OCF 3 .
- L 1 and L 2 are independently hydrogen or fluorine. Preferred combinations of L 1 and L 2, both L 1 and L 2 is fluorine, and one is hydrogen and the other is fluorine. A further preferred combination of L 1 and L 2, both L 1 and L 2 are fluorine.
- X 1 is an alkyl having 1 to 10 carbon atoms in which one hydrogen is replaced with fluorine, 1 to 2 carbon alkenyl in which one hydrogen is replaced with fluorine, and one carbon atom in which one hydrogen is replaced with fluorine
- L 1 is fluorine when it is ⁇ 9 alkoxy or alkenyloxy having 2 to 9 carbon atoms in which one hydrogen is replaced by fluorine.
- Y 1 and Y 2 are independently fluorine or chlorine.
- Preferred combinations of Y 1 and Y 2 are both Y 1 and Y 2 is fluorine, and one is fluorine and the other is chlorine. Further preferred combinations of Y 1 and Y 2 are both Y 1 and Y 2 are fluorine.
- a, b, c, and d are independently 0 or 1, and the sum of a, b, c, and d is 1, 2, or 3.
- R 1 When the left end group R 1 is linear, the temperature range of the liquid crystal phase is wide and the viscosity is small. When R 1 is a branched chain, the compatibility with other liquid crystal compounds is good. A compound in which R 1 is optically active is useful as a chiral dopant. By adding this compound to the composition, a reverse twisted domain generated in the liquid crystal display device can be prevented. A compound in which R 1 is not optically active is useful as a component of the composition.
- R 1 When R 1 is alkenyl, the preferred configuration depends on the position of the double bond. An alkenyl compound having a preferred configuration has a low viscosity, a high maximum temperature, or a wide temperature range of the liquid crystal phase. When R 1 is alkoxy, it has a high maximum temperature.
- ring A 1 to ring A 4 When all of ring A 1 to ring A 4 are 1,4-cyclohexylene, the clearing point is high and the viscosity is small. At least one of ring A 1 to ring A 4 is 1,4-phenylene, 2-fluoro-1,4-phenylene, 2,6-difluoro-1,4-phenylene, 2-chloro-1,4-phenylene, 2 , 6-dichloro-1,4-phenylene, or 2-chloro-6-fluoro-1,4-phenylene, the optical anisotropy is relatively large and the orientational order parameter is Relatively large.
- Ring A 1 to Ring A 4 are all 1,4-phenylene, 2-fluoro-1,4-phenylene, 2,6-difluoro-1,4-phenylene, 2-chloro-1,4-phenylene, 2 , 6-dichloro-1,4-phenylene, 2-chloro-6-fluoro-1,4-phenylene, pyrimidine-2,5-diyl, pyridine-2,5-diyl, or combinations thereof,
- the optical anisotropy is particularly large.
- At least one of ring A 1 to ring A 4 is 2-fluoro-1,4-phenylene, 2-chloro-1,4-phenylene, 2,6-difluoro-1,4-phenylene, 2,6-dichloro- 1,4-phenylene, 2-chloro-6-fluoro-1,4-phenylene, tetrahydropyran-2,5-diyl, 1,3-dioxane-2,5-diyl, 2,6,7-trioxabicyclo [2.2.2]
- Octane-1,4-diyl, pyrimidine-2,5-diyl, or pyridine-2,5-diyl has a large dielectric anisotropy.
- W 1 When the bonding group W 1 is a single bond, —CH 2 CH 2 —, or —CH ⁇ CH—, the viscosity is small.
- W 1 When W 1 is —CH ⁇ CH—, —CH 2 O—, or —OCH 2 —, the temperature range of the liquid crystal phase is wide and the elastic constant (K) is large.
- W 1 When W 1 is a single bond, —CH ⁇ CH—, —C ⁇ C—, —COO—, —OCO—, or —CF ⁇ CF—, the clearing point is high.
- W 1 When W 1 is —CH ⁇ CH—, —C ⁇ C—, or —CF ⁇ CF—, the optical anisotropy is large.
- W 1 When W 1 is —COO—, the dielectric anisotropy is large.
- W 1 is —OCH 2 —
- the dielectric constant in the minor axis direction is large.
- W 1 is a single bond, —CH 2 CH 2 —, —CH 2 O—, or —OCH 2 —, the chemical stability is high.
- the bonding groups Z 1 to Z 4 are a single bond, —CH 2 CH 2 —, —CH ⁇ CH—, or —CF 2 O—, the viscosity is small.
- Z 1 to Z 4 are —CH ⁇ CH—, —CH 2 O—, or —OCH 2 —, the temperature range of the liquid crystal phase is wide and the elastic constant (K) is large.
- Z 1 to Z 4 are a single bond, —CH ⁇ CH—, —C ⁇ C—, —COO—, —OCO—, or —CF ⁇ CF—
- the clearing point is high.
- Z 1 to Z 4 are —CH ⁇ CH—, —C ⁇ C—, or —CF ⁇ CF—, the optical anisotropy is large.
- Z 1 to Z 4 are —CF 2 O— or —COO—
- the dielectric anisotropy is large.
- Z 1 to Z 4 are —CH 2 CH 2 —, —CH 2 O—, or —OCH 2 —
- the dielectric constant in the minor axis direction is large.
- Z 1 to Z 4 are a single bond, —CH 2 CH 2 —, —CH 2 O—, or —OCH 2 —, the chemical stability is high.
- X 1 is fluorine, chlorine, —OCH 2 F, —OCHF 2 , or —OCF 3
- X 1 is fluorine, —CF 3 , —CF 2 CF 3 , — (CF 2 ) 3 —F, — (CF 2 ) 4 —F, — (CF 2 ) 5 —F, — (CF 2 ) 6 —F , — (CF 2 ) 7 —F, —OCF 3 , —OCF 2 CF 3 , —O— (CF 2 ) 3 —F, —O— (CF 2 ) 4 —F, —O— (CF 2 ) 5
- the chemical stability is high.
- both L 1 and L 2 are hydrogen, the clearing point is high.
- one of L 1 and L 2 is fluorine, the dielectric anisotropy is relatively large, the dielectric constant in the minor axis direction is large, and the compatibility with other liquid crystal compounds is good.
- both L 1 and L 2 are fluorine, the dielectric anisotropy is particularly large.
- the clearing point is high when both Y 1 and Y 2 are fluorine, or when Y 1 is fluorine and Y 2 is chlorine. When both Y 1 and Y 2 are fluorine, the viscosity is small and the chemical stability is high.
- the compound (1) is useful as a component of a liquid crystal composition used in a liquid crystal display device having a mode such as PC, TN, STN, ECB, OCB, IPS, FFS, and VA.
- Preferred compounds Preferred examples of the compound (1) include compounds represented by the formulas (1-1) to (1-7).
- R 1 is alkyl having 1 to 10 carbons, alkenyl having 2 to 10 carbons, or alkoxy having 1 to 9 carbons
- Ring A 1 , Ring A 2 , Ring A 3 , and Ring A 4 are independently 1,4-cyclohexylene, 1,4-cyclohexenylene, 1,4-phenylene, 2-fluoro-1,4 -Phenylene, 2,6-difluoro-1,4-phenylene, tetrahydropyran-2,5-diyl, or 1,3-dioxane-2,5-diyl
- Z 1, Z 2, Z 3 , and Z 4 are independently a single bond, - (CH 2) 2 - , - COO -, - CF 2 O -, - CH 2 O-, or -OCH 2 - with Yes
- W 1 is a single bond, - (CH 2)
- R 1 is alkyl having 1 to 10 carbons, alkenyl having 2 to 10 carbons, or alkoxy having 1 to 9 carbons
- Ring A 1 , Ring A 2 , Ring A 3 , and Ring A 4 are independently 1,4-cyclohexylene, 1,4-cyclohexenylene, 1,4-phenylene, 2-fluoro-1,4 -Phenylene, 2,6-difluoro-1,4-phenylene, tetrahydropyran-2,5-diyl, or 1,3-dioxane-2,5-diyl
- X 1 is fluorine, —CF 3 , or —OCF 3
- L 1 and L 2 are independently hydrogen or fluorine.
- R 1 is alkyl having 1 to 10 carbons, alkenyl having 2 to 10 carbons, or alkoxy having 1 to 9 carbons;
- X 1 is fluorine, —CF 3 , or —OCF 3 ;
- L 1 , L 2 , L 3 , L 4 , L 5 , and L 6 are independently hydrogen or fluorine.
- R 1 is alkyl having 1 to 10 carbons, alkenyl having 2 to 10 carbons, or alkoxy having 1 to 9 carbons;
- X 1 is fluorine, -CF 3 or -OCF 3 ;
- L 1 , L 2 , and L 3 are independently hydrogen or fluorine.
- MSG 1 (or MSG 2 ) is a monovalent organic group having at least one ring.
- the monovalent organic groups represented by a plurality of MSG 1 (or MSG 2 ) may be the same or different.
- Compounds (1A) to (1G) correspond to compound (1) or an intermediate of compound (1).
- ring A 1 and ring A 2 1,4-cyclohexylene, 1,4-cyclohexenylene, 1,4-phenylene, 2-fluoro-1,4-phenylene, 2,6-difluoro-1,4- Phenylene, 2-chloro-1,4-phenylene, 2,6-dichloro-1,4-phenylene, 2-chloro-6-fluoro-1,4-phenylene, tetrahydropyran-2,5-diyl, 1,3 -Dioxane-2,5-diyl, 2,6,7-trioxabicyclo [2.2.2] octane-1,4-diyl, pyrimidine-2,5-diyl, pyridine-2,5-diyl, etc.
- starting materials are commercially available or synthetic methods are well known.
- the compound (443) synthesized by a known method and the compound (42) synthesized by a known method are dehydrated in the presence of DCC and DMAP to obtain a compound (443).
- the compound (43) is sulfurated with a Lawson reagent to obtain the compound (44).
- it can be led to the compound (1-41) by fluorination using a hydrogen fluoride pyridine complex and a fluorination reagent such as NBS or DAST.
- Compound (45) is obtained by allowing propanedithiol and trifluoromethanesulfonic acid to act on compound (41) synthesized by a known method.
- compound (42) synthesized by a known method and compound (45) are converted into compound (1-41) by reacting with triethylamine, a triethylamine hydrogen fluoride complex, and bromine. it can.
- the compound (46) synthesized by the method described in JP2011-98942A and the compound (42) synthesized by a known method are reacted in the presence of a base such as potassium carbonate to give a compound ( 47).
- the compound (48) synthesized by a known method and the compound (47) are reacted in the presence of a palladium catalyst such as tetrakis (triphenylphosphine) palladium and a base such as potassium carbonate to give a compound (1- 42).
- a palladium catalyst such as tetrakis (triphenylphosphine) palladium
- a base such as potassium carbonate
- a base such as potassium carbonate
- compound (1-45) in which 2 O— and ring A 3 is 1,4-cyclohexylene can also be synthesized by the following method. Trisdiethylaminophosphine and dibromodifluoromethane are allowed to act on compound (51) synthesized by a known method to obtain compound (52). Next, bromine is allowed to act to obtain compound (53). Next, compound (42) and compound (53) can be reacted in the presence of a base such as potassium carbonate to give compound (1-44).
- a base such as potassium carbonate
- the compound (1-44) can be led to the compound (1-45) by catalytic hydrogenation using a catalyst such as palladium carbon.
- composition (1) contains at least one compound (1) as component A.
- the composition (1) may contain two or more compounds (1).
- the component of the liquid crystal compound may be only the compound (1).
- the composition (1) preferably contains at least one compound (1) in the range of 1 to 99% by weight in order to develop excellent physical properties.
- the preferred content of compound (1) is in the range of 5 to 60% by weight.
- the preferred content of compound (1) is 30% by weight or less.
- the composition (1) may contain the compound (1) and various liquid crystal compounds not described in the present specification.
- compositions contain a compound selected from components B, C, D and E shown below.
- the components can be selected in consideration of the dielectric anisotropy of the compound (1).
- the main components are components A, B and E.
- the main components are components A, C and E.
- the main components are components D and E, and component A is for the purpose of adjusting the voltage-transmittance curve of the device.
- a composition with appropriately selected components has a high maximum temperature, a low minimum temperature, a small viscosity, a suitable optical anisotropy, a large dielectric anisotropy, and a suitable elastic constant.
- Component B is compounds (2) to (4).
- Component C is compound (5).
- Component D is compounds (6) to (12).
- Component E is compounds (13) to (15). These components will be described in order.
- Component B is a compound having a halogen- or fluorine-containing group at the right end.
- Preferable examples of component B include compounds (2-1) to (2-16), compounds (3-1) to (3-113), and compounds (4-1) to (4-57). .
- the definitions of R 11 and X 11 are the same as in item 9 above.
- Component B has a positive dielectric anisotropy and is very excellent in stability to heat, light, etc., and therefore is used when preparing a composition for a mode such as TFT, IPS, FFS.
- the content of component B is suitably in the range of 1 to 99% by weight based on the weight of the composition, but is preferably in the range of 10 to 97% by weight, more preferably in the range of 40 to 95% by weight.
- the viscosity of this composition can be adjusted by further adding compounds (13) to (15) (component E).
- Component C is a compound (5) in which the right terminal group is —C ⁇ N or —C ⁇ C—C ⁇ N.
- Preferable examples of component C include compounds (5-1) to (5-64). In these compounds (component C), the definitions of R 12 and X 12 are the same as in item 10 above.
- Component C is mainly used when preparing a composition for STN mode, TN mode, or PSA mode because of its positive dielectric anisotropy and a large value. By adding this component C, the dielectric anisotropy of the composition can be increased.
- Component C has the effect of expanding the temperature range of the liquid crystal phase, adjusting the viscosity, or adjusting the optical anisotropy.
- Component C is also useful for adjusting the voltage-transmittance curve of the device.
- the content of Component C is suitably in the range of 1 to 99% by weight, preferably 10 to 97% by weight, based on the weight of the composition. %, More preferably 40 to 95% by weight.
- the temperature range, viscosity, optical anisotropy, dielectric anisotropy, etc. of the liquid crystal phase can be adjusted by adding Component E.
- Component D is compounds (6) to (12). These compounds have a benzene ring in which the lateral position is substituted with two halogens, such as 2,3-difluoro-1,4-phenylene.
- Preferred examples of component D include compounds (6-1) to (6-8), compounds (7-1) to (7-17), compound (8-1), compounds (9-1) to (9- 3), compounds (10-1) to (10-11), compounds (11-1) to (11-3), and compounds (12-1) to (12-3).
- the definitions of R 13 , R 14 and R 15 are the same as in item 11 above.
- Component D is a compound having a negative dielectric anisotropy.
- Component D is mainly used when preparing a composition for VA mode or PSA mode.
- the compound (6) since the compound (6) is a bicyclic compound, it mainly has the effect of adjusting the viscosity, adjusting the optical anisotropy, or adjusting the dielectric anisotropy.
- the compounds (7) and (8) are tricyclic compounds, there are effects of increasing the maximum temperature, increasing the optical anisotropy, or increasing the dielectric anisotropy.
- Compounds (9) to (12) have the effect of increasing the dielectric anisotropy.
- the content of component D is preferably 40% by weight or more, more preferably 50 to 95% by weight, based on the weight of the composition. It is a range.
- the content of component D is preferably 30% by weight or less based on the weight of the composition.
- Component E is a compound in which two terminal groups are alkyl or the like.
- Preferred examples of component E include compounds (13-1) to (13-11), compounds (14-1) to (14-19), and compounds (15-1) to (15-7). it can.
- the definitions of R 16 and R 17 are the same as in item 12 above.
- Component E is a compound close to neutrality because the absolute value of dielectric anisotropy is small.
- Compound (13) is mainly effective in adjusting viscosity or optical anisotropy.
- Compounds (14) and (15) have the effect of increasing the temperature range of the nematic phase by increasing the maximum temperature, or the effect of adjusting the optical anisotropy.
- the content of component E decreases the dielectric anisotropy of the composition but decreases the viscosity. Therefore, as long as the required value of the threshold voltage of the element is satisfied, the content is preferably large. Therefore, when preparing a composition, the content of component E is preferably 30% by weight or more, more preferably 40% by weight or more, based on the weight of the composition.
- Preparation of the composition (1) is performed by a method of dissolving necessary components at a high temperature.
- additives may be added to the composition.
- the additive include an optically active compound, a polymerizable compound, a polymerization initiator, an antioxidant, an ultraviolet absorber, a light stabilizer, a heat stabilizer, an antifoaming agent, and a dye.
- Such additives are well known to those skilled in the art and are described in the literature.
- Composition (1) may further contain at least one optically active compound.
- the optically active compound has an effect of preventing reverse twisting by inducing a helical structure in liquid crystal molecules to give a necessary twist angle.
- Preferred examples of the optically active compound include the following compounds (Op-1) to (Op-18).
- ring F is 1,4-cyclohexylene or 1,4-phenylene
- R 21 is alkyl having 1 to 10 carbons.
- Composition (1) adjusts the helical pitch by adding such an optically active compound.
- the helical pitch is preferably adjusted in the range of 40 to 200 ⁇ m for the TFT mode and TN mode compositions. In the case of an STN mode composition, it is preferably adjusted to a range of 6 to 20 ⁇ m. In the case of a composition for the BTN mode, it is preferably adjusted to a range of 1.5 to 4 ⁇ m.
- Two or more optically active compounds may be added for the purpose of adjusting the temperature dependence of the helical pitch.
- Composition (1) can also be used for the PSA mode by adding a polymerizable compound.
- the polymerizable compound include acrylate, methacrylate, vinyl compound, vinyloxy compound, propenyl ether, epoxy compound (oxirane, oxetane), vinyl ketone and the like.
- the polymerizable compound is polymerized by ultraviolet irradiation or the like.
- An initiator such as a photopolymerization initiator may be added. Appropriate conditions for polymerization, the appropriate type of initiator, and the appropriate amount are known to those skilled in the art and are described in the literature.
- Preferable examples of the polymerizable compound include compounds (M-1) to (M-12).
- R 25 , R 26 and R 27 are independently hydrogen or methyl; u, x and y are independently 0 or 1; v And w are independently integers from 1 to 10; L 21 , L 22 , L 23 , L 24 , L 25 , and L 26 are independently hydrogen or fluorine.
- An antioxidant is effective for maintaining a large voltage holding ratio.
- Preferred examples of the antioxidant include the following compounds (AO-1) and (AO-2), IRGANOX 415, IRGANOX 565, IRGANOX 1010, IRGANOX 1035, IRGANOX 3114, and IRGANOX 1098 (trade name: BASF). be able to.
- the ultraviolet absorber is effective for preventing a decrease in the maximum temperature.
- Preferred examples of the ultraviolet absorber include benzophenone derivatives, benzoate derivatives, triazole derivatives and the like.
- the following compounds (AO-3) and (AO-4), TINUVIN 329, TINUVIN P, TINUVIN 326, TINUVIN 234, TINUVIN 213, TINUVIN 400, TINUVIN 328, TINUVIN 99-2 (trade name: BASF) And 1,4-diazabicyclo [2.2.2] octane (DABCO).
- Light stabilizers such as sterically hindered amines are preferred in order to maintain a large voltage holding ratio.
- Preferred examples of the light stabilizer include the following compounds (AO-5) and (AO-6), TINUVIN 144, TINUVIN 765, and TINUVIN 770DF (trade name: BASF).
- a thermal stabilizer is also effective for maintaining a large voltage holding ratio, and a preferred example is IRGAFOS 168 (trade name: BASF).
- Antifoaming agents are effective for preventing foaming.
- Preferred examples of the antifoaming agent include dimethyl silicone oil and methylphenyl silicone oil.
- R 30 is alkyl having 1 to 20 carbons, alkoxy having 1 to 20 carbons, —COOR 31 or —CH 2 CH 2 COOR 31 , and R 31 is carbon having 1 to 20 carbons.
- R 32 is alkyl having 1 to 20 carbons.
- R 33 is hydrogen, methyl or O ⁇ (oxygen radical);
- ring G is xylene or 1 1,4-cyclohexylene, 4-phenylene; z is 1, 2 or 3.
- Composition (1) can be used for GH (guest host) mode if dichroic dyes such as merocyanine, styryl, azo, azomethine, azoxy, quinophthalone, anthraquinone, and tetrazine are added. You can also
- Liquid crystal display element Composition (1) has operation modes, such as PC mode, TN mode, STN mode, OCB mode, and PSA mode, and can be used for the liquid crystal display element driven by an active matrix (AM system).
- the composition (1) has operation modes such as a PC mode, a TN mode, an STN mode, an OCB mode, a VA mode, and an IPS mode, and can also be used for a liquid crystal display element driven by a passive matrix (PM) method. it can.
- AM and PM elements can be applied to any of a reflection type, a transmission type, and a transflective type.
- the composition (1) includes an NCAP (nematic curvilinear aligned phase) element produced by encapsulating nematic liquid crystal, a polymer dispersed liquid crystal display element (PDLCD) produced by forming a three-dimensional network polymer in the liquid crystal, It can also be used for a polymer network liquid crystal display element (PNLCD).
- NCAP nematic curvilinear aligned phase
- Example of Compound (1) Compound (1) was synthesized by the following procedure. The synthesized compound was identified by a method such as NMR analysis. The physical properties of the compounds were measured by the methods described below.
- NMR analysis For measurement, DRX-500 manufactured by Bruker BioSpin Corporation was used. In the 1 H-NMR measurement, the sample was dissolved in a deuterated solvent such as CDCl 3 and measured at room temperature under conditions of 500 MHz and 16 integrations. Tetramethylsilane was used as an internal standard. For 19 F-NMR measurement, CFCl 3 was used as an internal standard and the number of integrations was 24.
- s is a singlet
- d is a doublet
- t is a triplet
- q is a quartet
- quint is a quintet
- sex a sextet
- m is a multiplet
- br is broad.
- the ratio between the compound and the mother liquid crystal is this ratio, when the crystal (or smectic phase) precipitates at 25 ° C., the ratio between the compound and the mother liquid crystal is 10% by weight: 90% by weight, 5% by weight. %: 95% by weight, 1% by weight: 99% by weight, and the physical properties of the samples were measured at a rate at which crystals (or smectic phases) did not precipitate at 25 ° C. Unless otherwise specified, the ratio of the compound to the mother liquid crystal is 15% by weight: 85% by weight.
- the mother liquid crystal As the mother liquid crystal, the following mother liquid crystal (i) was used. The ratio of the component of the mother liquid crystal (i) is indicated by weight%.
- Measurement method Physical properties were measured by the following methods. Many of these methods are described in the JEITA standard (JEITA ED-2521B) established by the Japan Electronics and Information Technology Industries Association (JEITA), or It was a modified method. No TFT was attached to the TN device used for measurement.
- Phase structure A sample is placed on a hot plate (Mettler FP-52 hot stage) of a melting point measurement apparatus equipped with a polarizing microscope, and the phase state and its change are observed with a polarizing microscope while heating at a rate of 3 ° C / min. Observed and identified the type of phase.
- the crystal was represented as C. When the types of crystals can be distinguished, they are expressed as C 1 or C 2 , respectively.
- the smectic phase is represented as S and the nematic phase is represented as N.
- the smectic phase when a smectic A phase, a smectic B phase, a smectic C phase, or a smectic F phase can be distinguished, they are represented as S A , S B , S C , or S F , respectively.
- the liquid (isotropic) was designated as I.
- the transition temperature is expressed as “C 50.0 N 100.0 I”, for example. This indicates that the transition temperature from the crystal to the nematic phase is 50.0 ° C., and the transition temperature from the nematic phase to the liquid is 100.0 ° C.
- T C Minimum Temperature of a Nematic Phase
- a sample having a nematic phase was stored in a freezer at 0 ° C., ⁇ 10 ° C., ⁇ 20 ° C., ⁇ 30 ° C., and ⁇ 40 ° C. for 10 days, and then the liquid crystal phase was observed.
- TC was described as ⁇ ⁇ 20 ° C.
- the lower limit temperature of the nematic phase may be abbreviated as “lower limit temperature”.
- Viscosity Bulk viscosity; ⁇ ; measured at 20 ° C .; mPa ⁇ s
- An E-type viscometer manufactured by Tokyo Keiki Co., Ltd. was used for the measurement.
- Viscosity (Rotational viscosity; ⁇ 1; measured at 25 ° C .; mPa ⁇ s) The measurement followed the method described in M. Imai et al., Molecular Crystals and Liquid Crystals, Vol. 259, 37 (1995). A sample was put in a TN device having a twist angle of 0 ° and a distance (cell gap) between two glass substrates of 5 ⁇ m. A voltage was applied to this device in steps of 0.5 V in the range of 16 V to 19.5 V. After no application for 0.2 seconds, the application was repeated under the condition of only one rectangular wave (rectangular pulse; 0.2 seconds) and no application (2 seconds). The peak current and peak time of the transient current generated by this application were measured.
- Threshold voltage (Vth; measured at 25 ° C .; V) An LCD5100 luminance meter manufactured by Otsuka Electronics Co., Ltd. was used for the measurement.
- the light source is a halogen lamp.
- a sample was put in a normally white mode TN device in which the distance between two glass substrates (cell gap) was about 0.45 / ⁇ n ( ⁇ m) and the twist angle was 80 degrees.
- the voltage (32 Hz, rectangular wave) applied to this element was increased stepwise from 0V to 10V by 0.02V.
- the device was irradiated with light from the vertical direction, and the amount of light transmitted through the device was measured.
- a voltage-transmittance curve was created in which the transmittance was 100% when the light amount reached the maximum and the transmittance was 0% when the light amount was the minimum.
- the threshold voltage was expressed as a voltage when the transmittance reached 90%.
- VHR-1 Voltage holding ratio
- the TN device used for the measurement has a polyimide alignment film, and the distance (cell gap) between the two glass substrates is 5 ⁇ m. This element was sealed with an adhesive that was cured with ultraviolet rays after the sample was placed. The device was charged by applying a pulse voltage (5 V, 60 microseconds) at 25 ° C. The decaying voltage was measured for 16.7 milliseconds with a high-speed voltmeter, and the area A between the voltage curve and the horizontal axis in a unit cycle was determined. The area B is an area when it is not attenuated. The voltage holding ratio was expressed as a percentage of area A with respect to area B.
- VHR-2 Voltage holding ratio
- VHR-2 measured at 80 ° C .
- VHR-2 The voltage holding ratio
- VHR-2 was determined by the same method as VHR-1, except that measurement was performed at 80 ° C.
- Raw material Solmix A-11 (trade name) is a mixture of ethanol (85.5%), methanol (13.4%) and isopropanol (1.1%), and was obtained from Nippon Alcohol Sales Co., Ltd. [Example 1]
- reaction mixture was poured into water and the aqueous layer was extracted with ethyl acetate. The combined organic layers were washed with brine and dried over anhydrous magnesium sulfate. The solution was concentrated under reduced pressure and purified by recrystallization from heptane to give compound (T-3) (11.0 g; 86%).
- Step 3 Compound (T-4) (50.0 g), compound (T-5) (31.1 g), potassium carbonate (72) synthesized by the method described in JP2011-98942A under a nitrogen atmosphere 0.5 g), TBAB (tetrabutylammonium bromide) (11.3 g), and DMF (500 ml) were placed in the reactor and stirred at 90 ° C. for 2 hours. The reaction mixture was poured into water and the aqueous layer was extracted with toluene. The combined organic layers were washed with brine and dried over anhydrous magnesium sulfate. The solution was concentrated under reduced pressure, and the residue was purified by silica gel chromatography (heptane) to obtain compound (T-6) (52.1 g; 84%).
- Step 1 Compound (T-10) was prepared in the same manner as in Step 3 of Example 1, using Compound (T-4) (10.0 g) and Compound (T-9) (7.63 g) as raw materials. (9.45 g; 67%) was obtained.
- Step 4 Under a nitrogen atmosphere, dichlorobis (triphenylphosphine) palladium (0.430 g), triphenylphosphine (0.322 g), and IPA (30.0 ml) were placed in a reactor and heated under reflux for 1 hour. .
- compound (T-17) (6.88 g), compound (T-18) (4.27 g), potassium carbonate (5.65 g), TBAB (1.32 g), and IPA (70.0 ml) were added. The mixture was heated to reflux for 5 hours.
- the reaction mixture was poured into 3N hydrochloric acid (100 ml), and the aqueous layer was extracted with toluene.
- Step 5 Compound (T-20) was prepared in the same manner as in Step 3 of Example 1 using Compound (T-14) (7.33 g) and Compound (T-19) (6.48 g) as raw materials. (5.20 g; 53%) was obtained.
- Step 1 Compound (T-4-) (4.00 g) and Compound (T-22) (3.20 g) were used as starting materials in the same manner as in Step 1 of Example 2 to obtain compound (1-4- 21) (4.97 g; 86%).
- Step 1 Under a nitrogen atmosphere, compound (T-23) (15.0 g), compound (T-24) (11.7 g), potassium carbonate (12.5 g), and DMF (100 ml) were placed in a reactor. And stirred at 120 ° C. for 7 hours. The reaction mixture was poured into water and the aqueous layer was extracted with toluene. The combined organic layers were washed with brine and dried over anhydrous magnesium sulfate. The solution was concentrated under reduced pressure, and the residue was purified by silica gel chromatography (heptane) to obtain compound (T-25) (15.9 g; 69%).
- Step 2 Compound (T-34) was prepared in the same manner as in Step 1 of Example 1, using Compound (T-32) (17.0 g) and Compound (T-33) (22.0 g) as raw materials. (19.7 g; 99%) was obtained.
- Step 3 Compound (T-35) (17.7 g; 88%) was obtained in the same manner as in Step 5 of Example 1, using Compound (T-34) (19.7 g) as a starting material.
- Step 4 Compound (T-36) (14.4 g; 89%) was obtained in the same manner as in Step 1 of Example 9, using compound (T-35) (17.7 g) as a starting material.
- Step 5 Compound (1-2-15) was prepared in the same manner as in Step 1 of Example 1 using Compound (T-36) (3.00 g) and methyltriphenylphosphonium bromide (2.91 g) as raw materials. ) (2.01 g; 67%).
- Step 1 Compound (T-38) was prepared in the same manner as in Step 3 of Example 1, using Compound (T-4) (10.0 g) and Compound (T-37) (9.31 g) as raw materials. (13.9 g; 89%) was obtained.
- Step 2 Compound (1-5-21) (2.44 g; 50%) was obtained in the same manner as in Step 1 of Example 2, using Compound (T-38) (4.15 g) as a starting material. It was.
- the following compounds (No. 1-1-1) to (No. 1-1-20) and compounds (No. 1-1-20) are prepared according to the synthesis method of compound (1) already described and the synthesis procedures described in Examples 1 to 11. 1-2-1) to (No. 1-2-53), compounds (No. 1-3-1) to (No. 1-3-35), compounds (No. 1-4-1) to (No. No. 1-4-75), compounds (No. 1-5-1) to (No. 1-5-33), compounds (No. 1-6-1) to (No. 1-6-4) And compounds (No. 1-7-1) to (No. 1-7-3) can be synthesized.
- Table 1 summarizes the physical properties of the compound (No. 1-2-2) obtained in Example 1 and the comparative compound (S-1). From Table 1, the compound (No. 1-2-2) has a dielectric constant in the minor axis direction that is almost the same as that of the comparative compound (S-1), although the dielectric anisotropy is almost the same. It turns out that it is excellent in a big point.
- the tricyclic compound (No. 1-2-19), the compound (No. 1-2-10), and the compound (No. 1-2-15) shown in Example 2, Example 3, and Example 9 were used.
- All have a larger dielectric constant in the minor axis direction than the comparative compound (S-1). Therefore, it was found that the compound of the present invention is an excellent compound that can improve the transmittance of the liquid crystal composition used in the FFS mode liquid crystal display element.
- Table 2 summarizes the physical properties of the compound (No. 1-4-21) obtained in Example 6 and the comparative compound (S-2). From Table 2, the compound (No. 1-4-21) has a dielectric constant in the minor axis direction that is almost the same as that of the comparative compound (S-2), although the dielectric anisotropy is almost the same. It turns out that it is excellent in a big point.
- the tetracyclic compounds (No. 1-3-16), the compounds (No. 1-4-1), the compounds (Examples) shown in Example 4, Example 5, Example 7, Example 8, and Example 10 No. 1-4-38), the compound (No. 1-4-4-54), and the compound (No. 1-5-21) are all short-dielectric compared to the comparative compound (S-2). The rate is large. Therefore, it was found that the compound of the present invention is an excellent compound that can improve the transmittance of the liquid crystal composition used in the FFS mode liquid crystal display element.
- Table 3 summarizes the physical properties of the compound (No. 1-2-2) obtained in Example 1 and the comparative compound (S-3). From Table 3, the compound (No. 1-2-2) has a large dielectric anisotropy and a short axis compared with the comparative compound (S-3) although the maximum temperature is almost the same. It was found that the dielectric constant in the direction was large and the viscosity was small.
- the tricyclic compound (No. 1-2-19), the compound (No. 1-2-10), and the compound (No. 1-2-15) shown in Example 2, Example 3, and Example 9 were used.
- All have a larger dielectric anisotropy, a larger dielectric constant in the minor axis direction, and a lower viscosity than the comparative compound (S-3). Therefore, it was found that the compound of the present invention is an excellent compound that can shorten the response time of the element while improving the transmittance of the liquid crystal composition used in the FFS mode liquid crystal display element.
- Example of Composition (1) The liquid crystal composition (1) of the present invention will be described in detail by way of examples.
- the compounds in Examples were represented by symbols based on the definitions in Table 2 below.
- Table 2 the configuration regarding 1,4-cyclohexylene is trans.
- the number in parentheses after the symbol corresponds to the compound number.
- the symbol ( ⁇ ) means other liquid crystal compounds.
- the ratio (percentage) of the liquid crystal compound is a weight percentage (% by weight) based on the weight of the liquid crystal composition.
- the liquid crystalline compound of the present invention has high stability to heat, light, etc., high clearing point, low minimum temperature of liquid crystal phase, small viscosity, appropriate optical anisotropy, large dielectric anisotropy, minor axis direction At least one of physical properties such as a large dielectric constant, an appropriate elastic constant, and excellent compatibility with other liquid crystal compounds is satisfied.
- the liquid crystal composition of the present invention contains this compound, and has a high maximum temperature, a low minimum temperature, a small viscosity, an appropriate optical anisotropy, a large dielectric anisotropy, a large dielectric constant in the minor axis direction, an appropriate Satisfy at least one of physical properties such as elastic constant. This composition has an appropriate balance with respect to at least two physical properties.
- the liquid crystal display element of the present invention contains this composition and has a wide temperature range in which the element can be used, a short response time, a large voltage holding ratio, a low threshold voltage, a large contrast ratio, and a long lifetime. Therefore, it can be widely used for liquid crystal display elements used in personal computers and televisions.
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Abstract
Description
(1)熱、光などに対する高い安定性
(2)高い透明点
(3)液晶相の低い下限温度
(4)小さな粘度(η)
(5)適切な光学的異方性(Δn)
(6)大きな誘電率異方性(Δε)
(7)適切な弾性定数(K)
(8)他の液晶性化合物との優れた相溶性
(9)短軸方向の大きな誘電率(ε⊥)
式(1)において、
R1は、炭素数1~15のアルキルであり、このアルキルにおいて、少なくとも1つの-CH2-は-O-または-S-で置き換えられてもよく、少なくとも1つの-(CH2)2-は-CH=CH-で置き換えられてもよく、これらの基において、少なくとも1つの水素はハロゲンで置き換えられてもよく;
環A1、環A2、環A3、および環A4は独立して、1,4-シクロへキシレン、1,4-シクロヘキセニレン、1,4-フェニレン、2-フルオロ-1,4-フェニレン、2,6-ジフルオロ-1,4-フェニレン、2-クロロ-1,4-フェニレン、2,6-ジクロロ-1,4-フェニレン、2-クロロ-6-フルオロ-1,4-フェニレン、テトラヒドロピラン-2,5-ジイル、1,3-ジオキサン-2,5-ジイル、2,6,7-トリオキサビシクロ[2.2.2]オクタン-1,4-ジイル、ピリミジン-2,5-ジイル、またはピリジン-2,5-ジイルであり;
X1は、ハロゲン、-C≡N、-N=C=S、または少なくとも1つの水素がフッ素で置き換えられた炭素数1~10のアルキル、少なくとも1つの水素がフッ素で置き換えられた炭素数2~10のアルケニル、少なくとも1つの水素がフッ素で置き換えられた炭素数1~9のアルコキシ、または少なくとも1つの水素がフッ素で置き換えられた炭素数2~9のアルケニルオキシであり;
L1およびL2は独立して、水素またはフッ素であり;
Y1およびY2は独立して、フッ素または塩素であり;
W1は、単結合、-(CH2)2-、-CH=CH-、-C≡C-、-COO-、-OCO-、-CH2O-、-OCH2-、または-CF=CF-であり;
Z1、Z2、Z3、およびZ4は独立して、単結合、-(CH2)2-、-CH=CH-、-C≡C-、-COO-、-OCO-、-CF2O-、-CH2O-、-OCH2-、または-CF=CF-であり、
a、b、c、およびdは独立して、0または1であり、a、b、c、およびdの和は、1、2、または3であり;
aが1のときのZ1、bが1のときのZ2、cが1のときのZ3、およびdが1のときのZ4のうち、少なくとも1つは-CF2O-である。
式(1)において、
R1は、炭素数1~15のアルキルであり、このアルキルにおいて、少なくとも1つの-CH2-は-O-または-S-で置き換えられてもよく、少なくとも1つの-(CH2)2-は-CH=CH-で置き換えられてもよく、これらの基において、少なくとも1つの水素はハロゲンで置き換えられてもよく;
環A1、環A2、環A3、および環A4は独立して、1,4-シクロへキシレン、1,4-シクロヘキセニレン、1,4-フェニレン、2-フルオロ-1,4-フェニレン、2,6-ジフルオロ-1,4-フェニレン、2-クロロ-1,4-フェニレン、2,6-ジクロロ-1,4-フェニレン、2-クロロ-6-フルオロ-1,4-フェニレン、テトラヒドロピラン-2,5-ジイル、1,3-ジオキサン-2,5-ジイル、2,6,7-トリオキサビシクロ[2.2.2]オクタン-1,4-ジイル、ピリミジン-2,5-ジイル、またはピリジン-2,5-ジイルであり;
X1は、ハロゲン、-C≡N、-N=C=S、または少なくとも1つの水素がフッ素で置き換えられた炭素数1~10のアルキル、少なくとも1つの水素がフッ素で置き換えられた炭素数2~10のアルケニル、少なくとも1つの水素がフッ素で置き換えられた炭素数1~9のアルコキシ、または少なくとも1つの水素がフッ素で置き換えられた炭素数2~9のアルケニルオキシであり;
L1およびL2は独立して、水素またはフッ素であり;
Y1およびY2は独立して、フッ素または塩素であり;
W1は、単結合、-(CH2)2-、-CH=CH-、-C≡C-、-COO-、-OCO-、-CH2O-、-OCH2-、または-CF=CF-であり;
Z1、Z2、Z3、およびZ4は独立して、単結合、-(CH2)2-、-CH=CH-、-C≡C-、-COO-、-OCO-、-CF2O-、-CH2O-、-OCH2-、または-CF=CF-であり;
a、b、c、およびdは独立して、0または1であり、a、b、c、およびdの和は、1、2、または3であり;
aが1のときのZ1、bが1のときのZ2、cが1のときのZ3、およびdが1のときのZ4のうち、少なくとも1つは-CF2O-である。
式(1-1)~(1-7)において、
R1は、炭素数1~10のアルキル、炭素数2~10のアルケニル、または炭素数1~9のアルコキシであり;
環A1、環A2、環A3、および環A4は独立して、1,4-シクロへキシレン、1,4-シクロヘキセニレン、1,4-フェニレン、2-フルオロ-1,4-フェニレン、2,6-ジフルオロ-1,4-フェニレン、テトラヒドロピラン-2,5-ジイル、または1,3-ジオキサン-2,5-ジイルであり;
Z1、Z2、Z3、およびZ4は独立して、単結合、-(CH2)2-、-COO-、-CF2O-、-CH2O-、または-OCH2-であり;
W1は、単結合、-(CH2)2-、または-OCH2-であり;
X1は、フッ素、-CF3、または-OCF3であり;
L1およびL2は独立して、水素またはフッ素であり;
Y1およびY2は独立して、フッ素または塩素であり;
式(1-3)において、Z1およびZ2のうちいずれか一方は-CF2O-であり;
式(1-4)において、Z1およびZ3のうちいずれか一方は-CF2O-であり;
式(1-5)において、Z3およびZ4のうちいずれか一方は-CF2O-であり;
式(1-6)において、Z1、Z2、およびZ3のうちいずれか1つは-CF2O-であり;
式(1-7)において、Z1、Z3、およびZ4のうちいずれか1つは-CF2O-である。
式(1-8)~(1-12)において、
R1は炭素数1~10のアルキル、炭素数2~10のアルケニル、または炭素数1~9のアルコキシであり;
環A1、環A2、環A3、および環A4は独立して、1,4-シクロへキシレン、1,4-シクロヘキセニレン、1,4-フェニレン、2-フルオロ-1,4-フェニレン、2,6-ジフルオロ-1,4-フェニレン、テトラヒドロピラン-2,5-ジイル、または1,3-ジオキサン-2,5-ジイルであり;
X1は、フッ素、-CF3、または-OCF3であり;
L1およびL2は独立して、水素またはフッ素である。
式(1-13)~(1-22)において、R1は炭素数1~10のアルキル、炭素数2~10のアルケニル、または炭素数1~9のアルコキシであり;X1は、フッ素、-CF3、または-OCF3であり;L1、L2、L3、L4、L5、およびL6は独立して、水素またはフッ素である。
式(1-23)~(1-25)において、R1は炭素数1~10のアルキル、炭素数2~10のアルケニル、または炭素数1~9のアルコキシであり;X1は、フッ素、-CF3、または-OCF3であり;L1、L2、およびL3は独立して、水素またはフッ素である。
式(2)~(4)において、
R11は、炭素数1~10のアルキルまたは炭素数2~10のアルケニルであり、このアルキルおよびアルケニルにおいて、少なくとも1つの水素はフッ素で置き換えられてもよく、少なくとも1つの-CH2-は-O-で置き換えられてもよく;
X11は、フッ素、塩素、-OCF3、-OCHF2、-CF3、-CHF2、-CH2F、-OCF2CHF2、または-OCF2CHFCF3であり;
環B1、環B2、および環B3は独立して、1,4-シクロヘキシレン、1,4-フェニレン、2-フルオロ-1,4-フェニレン、2,6-ジフルオロ-1,4-フェニレン、テトラヒドロピラン-2,5-ジイル、1,3-ジオキサン-2,5-ジイル、またはピリミジン-2,5-ジイルであり;
Z11、Z12、およびZ13は独立して、単結合、-CH2CH2-、-CH=CH-、-C≡C-、-COO-、-CF2O-、-OCF2-、-CH2O-、または-(CH2)4-であり;
L11およびL12は独立して、水素またはフッ素である。
式(5)において、
R12は、炭素数1~10のアルキルまたは炭素数2~10のアルケニルであり、このアルキルおよびアルケニルにおいて、少なくとも1つの水素はフッ素で置き換えられてもよく、少なくとも1つの-CH2-は-O-で置き換えられてもよく;
X12は、-C≡Nまたは-C≡C-C≡Nであり;
環C1は、1,4-シクロヘキシレン、1,4-フェニレン、2-フルオロ-1,4-フェニレン、2,6-ジフルオロ-1,4-フェニレン、テトラヒドロピラン-2,5-ジイル、1,3-ジオキサン-2,5-ジイル、またはピリミジン-2,5-ジイルであり;
Z14は、単結合、-CH2CH2-、-C≡C-、-COO-、-CF2O-、-OCF2-、または-CH2O-であり;
L13およびL14は独立して、水素またはフッ素であり;
iは、1、2、3、または4である。
式(6)~(12)において、
R13およびR14は独立して、炭素数1~10のアルキルまたは炭素数2~10のアルケニルであり、このアルキルおよびアルケニルにおいて、少なくとも1つの-CH2-は-O-で置き換えられてもよく;
R15は、水素、フッ素、炭素数1~10のアルキル、または炭素数2~10のアルケニルであり、このアルキルおよびアルケニルにおいて、少なくとも1つの-CH2-は-O-で置き換えられてもよく、少なくとも1つの水素はフッ素で置き換えられてもよく;
S11は、水素またはメチルであり;
Xは、-CF2-、-O-、または-CHF-であり;
環D1、環D2、環D3、および環D4は独立して、1,4-シクロヘキシレン、1,4-シクロヘキセニレン、少なくとも1つの水素がフッ素で置き換えられてもよい1,4-フェニレン、テトラヒドロピラン-2,5-ジイル、またはデカヒドロナフタレン-2,6-ジイルであり;
環D5および環D6は独立して、1,4-シクロヘキシレン、1,4-シクロヘキセニレン、1,4-フェニレン、テトラヒドロピラン-2,5-ジイル、またはデカヒドロナフタレン-2,6-ジイルであり;
Z15、Z16、Z17、およびZ18は独立して、単結合、-CH2CH2-、-COO-、-CH2O-、-OCF2-、または-OCF2CH2CH2-であり;
L15およびL16は独立して、フッ素または塩素であり;
j、k、m、n、p、q、r、およびsは独立して、0または1であり、k、m、n、およびpの和は、1または2であり、q、r、およびsの和は、0、1、2、または3であり、tは、1、2、または3である。
式(13)~(15)において、
R16およびR17は独立して、炭素数1~10のアルキルまたは炭素数2~10のアルケニルであり、このアルキルおよびアルケニルにおいて、少なくとも1つの-CH2-は-O-で置き換えられてもよく、少なくとも1つの水素はフッ素で置き換えられてもよく;
環E1、環E2、環E3、および環E4は独立して、1,4-シクロヘキシレン、1,4-フェニレン、2-フルオロ-1,4-フェニレン、2,5-ジフルオロ-1,4-フェニレン、またはピリミジン-2,5-ジイルであり;
Z19、Z20、およびZ21は独立して、単結合、-CH2CH2-、-CH=CH-、-C≡C-、または-COO-である。
本発明の化合物(1)は、環として2位および3位の水素がハロゲンで置き換えられた1,4-フェニレンを有し、かつ結合基としてジフルオロメチレンオキシを有しているので、大きな誘電率異方性と、短軸方向の大きな誘電率を併せ持つという特徴を有する。本発明の化合物(1)の好ましい例について説明する。化合物(1)における末端基、環構造、結合基、および置換基の好ましい例は、化合物(1)の下位式にも適用される。
式(1)において、
R1は、炭素数1~15のアルキルであり、このアルキルにおいて、少なくとも1つの-CH2-は-O-または-S-で置き換えられてもよく、少なくとも1つの-(CH2)2-は-CH=CH-で置き換えられてもよく、これらの基において、少なくとも1つの水素はハロゲンで置き換えられてもよい。
Z1、Z2、Z3、およびZ4の好ましい例は、単結合、-(CH2)2-、-COO-、-CF2O-、-CH2O-、および-OCH2-である。Z1、Z2、Z3、およびZ4のさらに好ましい例は、単結合および-CF2O-である。
化合物(1)において、R1、環A1~環A4、W1、Z1~Z4、X1、L1、L2、Y1、およびY2の種類、-CF2O-の位置、a、b、c、およびdの組合せを適切に選択することによって、透明点、光学的異方性、誘電率異方性などの物性を任意に調整することが可能である。化合物の物性に大きな差異がないので、化合物(1)は、2H(重水素)、13Cなどの同位体を天然存在比の量より多く含んでもよい。R1などの種類が化合物(1)の物性に及ぼす主要な効果を以下に説明する。
化合物(1)の好ましい例としては、式(1-1)~(1-7)で表される化合物を挙げることができる。
式(1-1)~(1-7)において、
R1は、炭素数1~10のアルキル、炭素数2~10のアルケニル、または炭素数1~9のアルコキシであり;
環A1、環A2、環A3、および環A4は独立して、1,4-シクロへキシレン、1,4-シクロヘキセニレン、1,4-フェニレン、2-フルオロ-1,4-フェニレン、2,6-ジフルオロ-1,4-フェニレン、テトラヒドロピラン-2,5-ジイル、または1,3-ジオキサン-2,5-ジイルであり;
Z1、Z2、Z3、およびZ4は独立して、単結合、-(CH2)2-、-COO-、-CF2O-、-CH2O-、または-OCH2-であり;
W1は、単結合、-(CH2)2-、または-OCH2-であり;
X1は、フッ素、-CF3、または-OCF3であり;
L1およびL2は独立して、水素またはフッ素であり;
Y1およびY2は独立して、フッ素または塩素であり;
式(1-3)において、Z1およびZ2のうちいずれか一方は-CF2O-であり;
式(1-4)において、Z1およびZ3のうちいずれか一方は-CF2O-であり;
式(1-5)において、Z3およびZ4のうちいずれか一方は-CF2O-であり;
式(1-6)において、Z1、Z2、およびZ3のうちいずれか1つは-CF2O-であり;
式(1-7)において、Z1、Z3、およびZ4のうちいずれか1つは-CF2O-である。
式(1-8)~(1-12)において、
R1は炭素数1~10のアルキル、炭素数2~10のアルケニル、または炭素数1~9のアルコキシであり;
環A1、環A2、環A3、および環A4は独立して、1,4-シクロへキシレン、1,4-シクロヘキセニレン、1,4-フェニレン、2-フルオロ-1,4-フェニレン、2,6-ジフルオロ-1,4-フェニレン、テトラヒドロピラン-2,5-ジイル、または1,3-ジオキサン-2,5-ジイルであり;
X1は、フッ素、-CF3、または-OCF3であり;
L1およびL2は独立して、水素またはフッ素である。
式(1-13)~(1-22)において、R1は炭素数1~10のアルキル、炭素数2~10のアルケニル、または炭素数1~9のアルコキシであり;X1は、フッ素、-CF3、または-OCF3であり;L1、L2、L3、L4、L5、およびL6は独立して、水素またはフッ素である。
式(1-23)~(1-25)において、R1は炭素数1~10のアルキル、炭素数2~10のアルケニル、または炭素数1~9のアルコキシであり;X1は、フッ素、-CF3、または-OCF3であり;L1、L2、およびL3は独立して、水素またはフッ素である。
化合物(1)の合成法について説明する。化合物(1)は有機合成化学の方法を適切に組み合わせることにより合成できる。出発物に目的の末端基、環および結合基を導入する方法は、「オーガニック・シンセシス」(Organic Syntheses, John Wiley & Sons, Inc.)、「オーガニック・リアクションズ」(Organic Reactions, John Wiley & Sons, Inc.)、「コンプリヘンシブ・オーガニック・シンセシス」(Comprehensive Organic Synthesis, Pergamon Press)、「新実験化学講座」(丸善)などの成書に記載されている。
化合物(1)における結合基を生成する方法の例は、下記のスキームのとおりである。このスキームにおいて、MSG1(またはMSG2)は、少なくとも1つの環を有する一価の有機基である。複数のMSG1(またはMSG2)が表す一価の有機基は、同一であってもよいし、または異なってもよい。化合物(1A)~(1G)は、化合物(1)または化合物(1)の中間体に相当する。
アリールホウ酸(21)と化合物(22)を、炭酸塩、テトラキス(トリフェニルホスフィン)パラジウム触媒の存在下で反応させ、化合物(1A)を合成する。この化合物(1A)は、化合物(23)にn-ブチルリチウムを、次いで塩化亜鉛を反応させ、ジクロロビス(トリフェニルホスフィン)パラジウム触媒の存在下で化合物(22)を反応させても合成される。
化合物(23)にn-ブチルリチウムを、次いで二酸化炭素を反応させ、カルボン酸(24)を得る。このカルボン酸(24)と、化合物(21)から誘導したフェノール(25)とをDCC(1,3-ジシクロヘキシルカルボジイミド)とDMAP(4-ジメチルアミノピリジン)の存在下で脱水させて-COO-を有する化合物(1B)を合成する。この方法によって-OCO-を有する化合物も合成する。
化合物(1B)をローソン試薬で硫黄化し、化合物(26)を得る。化合物(26)をフッ化水素ピリジン錯体とNBS(N-ブロモスクシンイミド)でフッ素化し、-CF2O-を有する化合物(1C)を合成する。M. Kuroboshi et al., Chem. Lett., 1992,827.を参照。化合物(1C)は化合物(26)をDAST((ジエチルアミノ)サルファートリフルオリド)でフッ素化しても合成される。W. H. Bunnelle et al., J. Org. Chem. 1990, 55, 768.を参照。。
化合物(22)をn-ブチルリチウム、次いでDMF(N,N-ジメチルホルムアミド)と反応させてアルデヒド(27)を得る。ホスホニウム塩(28)とカリウムtert-ブトキシドを反応させて発生させたリンイリドを、アルデヒド(27)と反応させて化合物(1D)を合成する。反応条件によってはシス体が生成するので、必要に応じて公知の方法によりシス体をトランス体に異性化する。
化合物(1D)をパラジウム炭素触媒の存在下で水素化し、化合物(1E)を合成する。
ジクロロパラジウムとヨウ化銅の触媒存在下で、化合物(23)に2-メチル-3-ブチン-2-オールを反応させたのち、塩基性条件下で脱保護して化合物(29)を得る。ジクロロビス(トリフェニルホスフィン)パラジウムとハロゲン化銅との触媒存在下、化合物(29)を化合物(22)と反応させて、化合物(1F)を合成する。
化合物(27)を水素化ホウ素ナトリウムで還元して化合物(30)を得る。これを臭化水素酸で臭素化して化合物(31)を得る。炭酸カリウムの存在下、化合物(25)と化合物(31)を反応させて、化合物(1G)を合成する。この方法によって-OCH2-を有する化合物も合成する。
化合物(23)をn-ブチルリチウムで処理したあと、テトラフルオロエチレンを反応させて化合物(32)を得る。化合物(22)をn-ブチルリチウムで処理したあと化合物(32)と反応させて、化合物(1H)を合成する。
1,4-シクロヘキシレン、1,4-シクロヘキセニレン、1,4-フェニレン、2-フルオロ-1,4-フェニレン、2,6-ジフルオロ-1,4-フェニレン、2-クロロ-1,4-フェニレン、2,6-ジクロロ-1,4-フェニレン、2-クロロ-6-フルオロ-1,4-フェニレン、テトラヒドロピラン-2,5-ジイル、1,3-ジオキサン-2,5-ジイル、2,6,7-トリオキサビシクロ[2.2.2]オクタン-1,4-ジイル、ピリミジン-2,5-ジイル、ピリジン-2,5-ジイルなどの環に関しては出発物が市販されているか、または合成法がよく知られている。
化合物(1)を合成する方法の例は、次のとおりである。これらの化合物において、R1、環A1~環A4、W1、Z1~Z4、X1、L1、L2、Y1、Y2、a、b、c、およびdの定義は、前記の項1と同一である。
本発明の液晶組成物(1)について説明をする。この組成物(1)は、少なくとも1つの化合物(1)を成分Aとして含む。組成物(1)は、2つ以上の化合物(1)を含んでいてもよい。液晶性化合物の成分が化合物(1)のみであってもよい。組成物(1)は、化合物(1)の少なくとも1つを1~99重量%の範囲で含有することが、優良な物性を発現させるために好ましい。誘電率異方性が正である組成物において、化合物(1)の好ましい含有量は5~60重量%の範囲である。誘電率異方性が負である組成物において、化合物(1)の好ましい含有量は30重量%以下である。組成物(1)は、化合物(1)と、本明細書中に記載しなかった種々の液晶性化合物とを含んでもよい。
組成物(1)は、PCモード、TNモード、STNモード、OCBモード、PSAモードなどの動作モードを有し、アクティブマトリックス(AM方式)で駆動する液晶表示素子に使用できる。組成物(1)は、PCモード、TNモード、STNモード、OCBモード、VAモード、IPSモードなどの動作モードを有し、パッシブマトリクス(PM)方式で駆動する液晶表示素子にも使用することができる。これらのAM方式およびPM方式の素子は、反射型、透過型、半透過型のいずれのタイプにも適用ができる。
化合物(1)は、下記の手順により合成した。合成した化合物は、NMR分析などの方法により同定した。化合物の物性は、下記に記載した方法により測定した。
測定には、ブルカーバイオスピン社製のDRX-500を用いた。1H-NMRの測定では、試料をCDCl3などの重水素化溶媒に溶解させ、室温で、500MHz、積算回数16回の条件で測定した。テトラメチルシランを内部標準として用いた。19F-NMRの測定では、CFCl3を内部標準として用い、積算回数24回で行った。核磁気共鳴スペクトルの説明において、sはシングレット、dはダブレット、tはトリプレット、qはカルテット、quinはクインテット、sexはセクステット、mはマルチプレット、brはブロードであることを意味する。
相構造および転移温度を測定するときには、液晶性化合物そのものを試料として用いた。ネマチック相の上限温度、粘度、光学的異方性、誘電率異方性などの物性を測定するときには、化合物を母液晶に混合して調製した組成物を試料として用いた。
物性の測定は下記の方法で行った。これらの多くは、社団法人電子情報技術産業協会(Japan Electronics and Information Technology Industries Association;以下、JEITAと略す)で審議制定されるJEITA規格(JEITA・ED-2521B)に記載された方法、またはこれを修飾した方法であった。測定に用いたTN素子には、TFTを取り付けなかった。
偏光顕微鏡を備えた融点測定装置のホットプレート(メトラー社FP-52型ホットステージ)に試料を置き、3℃/分の速度で加熱しながら相状態とその変化を偏光顕微鏡で観察し、相の種類を特定した。
測定には、パーキンエルマー社製の示差走査熱量計Diamond DSCシステム、またはエスエスアイ・ナノテクノロジー社製の高感度示差走査熱量計X-DSC7000を用いた。3℃/分速度で昇降温し、試料の相変化に伴う吸熱ピーク、または発熱ピークの開始点を外挿により求め、転移温度を決定した。化合物が固体からスメクチック相、ネマチック相などの液晶相に転移する温度を「液晶相の下限温度」と略すことがある。化合物が液晶相から等方性液体に転移する温度を「透明点」と略すことがある。
化合物の割合が、20重量%、15重量%、10重量%、5重量%、3重量%、および1重量%となるように母液晶と化合物とを混合した試料を調製し、試料をガラス瓶に入れた。このガラス瓶を、-10℃または-20℃のフリーザー中に一定期間保管したあと、結晶またはスメクチック相が析出しているかどうか観察をした。
偏光顕微鏡を備えた融点測定装置のホットプレートに試料を置き、1℃/分の速度で加熱した。試料の一部がネマチック相から等方性液体に変化したときの温度を測定した。ネマチック相の上限温度を「上限温度」と略すことがある。試料が化合物と母液晶との混合物であるときは、TNIの記号で示した。試料が化合物と成分Bなどとの混合物であるときは、NIの記号で示した。
ネマチック相を有する試料を0℃、-10℃、-20℃、-30℃、および-40℃のフリーザー中に10日間保管したあと、液晶相を観察した。例えば、試料が-20℃ではネマチック相のままであり、-30℃では結晶またはスメクチック相に変化したとき、TCを≦-20℃と記載した。ネマチック相の下限温度を「下限温度」と略すことがある。
測定には東京計器株式会社製のE型回転粘度計を用いた。
測定は、M. Imai et al., Molecular Crystals and Liquid Crystals, Vol. 259, 37 (1995) に記載された方法に従った。ツイスト角が0°であり、そして2枚のガラス基板の間隔(セルギャップ)が5μmであるTN素子に試料を入れた。この素子に16Vから19.5Vの範囲で0.5V毎に段階的に印加した。0.2秒の無印加のあと、ただ1つの矩形波(矩形パルス;0.2秒)と無印加(2秒)の条件で印加を繰り返した。この印加によって発生した過渡電流(transient current)のピーク電流(peak current)とピーク時間(peak time)を測定した。これらの測定値とM. Imaiらの論文、40頁の計算式(8)とから回転粘度の値を得た。この計算に必要な誘電率異方性の値は、この回転粘度を測定した素子を用い、下に記載した方法で求めた。
測定は、波長589nmの光を用い、接眼鏡に偏光板を取り付けたアッベ屈折計により行なった。主プリズムの表面を一方向にラビングしたあと、試料を主プリズムに滴下した。屈折率(n∥)は偏光の方向がラビングの方向と平行であるときに測定した。屈折率(n⊥)は偏光の方向がラビングの方向と垂直であるときに測定した。光学的異方性(Δn)の値は、Δn=n∥-n⊥、の式から計算した。
2枚のガラス基板の間隔(セルギャップ)が9μmであり、そしてツイスト角が80度であるTN素子に試料を入れた。この素子にサイン波(10V、1kHz)を印加し、2秒後に液晶分子の長軸方向における誘電率(ε∥)を測定した。この素子にサイン波(0.5V、1kHz)を印加し、2秒後に液晶分子の短軸方向における誘電率(ε⊥)を測定した。誘電率異方性の値は、Δε=ε∥-ε⊥、の式から計算した。
測定には横河・ヒューレットパッカード株式会社製のHP4284A型LCRメータを用いた。2枚のガラス基板の間隔(セルギャップ)が20μmである水平配向素子に試料を入れた。この素子に0ボルトから20ボルト電荷を印加し、静電容量および印加電圧を測定した。測定した静電容量(C)と印加電圧(V)の値を「液晶デバイスハンドブックク」(日刊工業新聞社)、75頁にある式(2.98)、式(2.101)を用いてフィッティングし、式(2.99)からK11およびK33の値を得た。次に171頁にある式(3.18)に、先ほど求めたK11およびK33の値を用いてK22を算出した。弾性定数Kは、このようにして求めたK11、K22、およびK33の平均値で表した。
測定には大塚電子株式会社製のLCD5100型輝度計を用いた。光源はハロゲンランプである。2枚のガラス基板の間隔(セルギャップ)が約0.45/Δn(μm)であり、ツイスト角が80度であるノーマリーホワイトモード(normally white mode)のTN素子に試料を入れた。この素子に印加する電圧(32Hz、矩形波)は0Vから10Vまで0.02Vずつ段階的に増加させた。この際に、素子に垂直方向から光を照射し、素子を透過した光量を測定した。この光量が最大になったときが透過率100%であり、この光量が最小であったときが透過率0%である電圧-透過率曲線を作成した。しきい値電圧は透過率が90%になったときの電圧で表した。
測定に用いたTN素子はポリイミド配向膜を有し、そして2枚のガラス基板の間隔(セルギャップ)は5μmである。この素子は試料を入れたあと紫外線で硬化する接着剤で密閉した。この素子に25℃でパルス電圧(5Vで60マイクロ秒)を印加して充電した。減衰する電圧を高速電圧計で16.7ミリ秒のあいだ測定し、単位周期における電圧曲線と横軸との間の面積Aを求めた。面積Bは減衰しなかったときの面積である。電圧保持率は面積Bに対する面積Aの百分率で表した。
電圧保持率(VHR-2)は、80℃で測定した以外はVHR-1と同様の方法で求めた。
ソルミックスA-11(商品名)は、エタノール(85.5%)、メタノール(13.4%)とイソプロパノール(1.1%)の混合物であり、日本アルコール販売(株)から入手した。
[実施例1]
窒素雰囲気下、エチルトリフェニルホスホニウムブロミド(61.8g)およびTHF(600ml)を反応器に入れ、-30℃に冷却した。そこへカリウムt-ブトキシド(17.9g)をゆっくりと加え、30分間撹拌した。次に化合物(T-1)(18.9g)のTHF(100ml)溶液をゆっくりと加え、室温に戻しつつ3時間撹拌した。反応混合物を氷水に注ぎ込み、水層をジエチルエーテルで抽出した。一緒にした有機層を食塩水で洗浄し、無水硫酸マグネシウムで乾燥した。この溶液を減圧下で濃縮し、残渣をシリカゲルクロマトグラフィー(ヘキサン)で精製して、化合物(T-2)(16.4g;80%)を得た。
窒素雰囲気下、化合物(T-2)(10.0g)およびTHF(100ml)を反応器に入れ、-70℃に冷却した。そこへsec-ブチルリチウム(1.07M;シクロヘキサン、n-ヘキサン溶液;66.7ml)をゆっくりと加え2時間撹拌した。次にホウ酸トリメチル(9.73g)のTHF(20.0ml)溶液をゆっくりと加え室温に戻しつつ12時間撹拌した。次に-30℃に冷却し、6N塩酸(65.0ml)をゆっくりと加え、室温に戻しつつ3時間撹拌した。反応混合物を水に注ぎ込み、水層を酢酸エチルで抽出した。一緒にした有機層を食塩水で洗浄し、無水硫酸マグネシウムで乾燥した。この溶液を減圧下で濃縮し、ヘプタンからの再結晶により精製して、化合物(T-3)(11.0g;86%)を得た。
窒素雰囲気下、特開2011-98942号公報に記載された方法により合成した化合物(T-4)(50.0g)、化合物(T-5)(31.1g)、炭酸カリウム(72.5g)、TBAB(テトラブチルアンモニウムブロミド)(11.3g)、およびDMF(500ml)を反応器に入れて、90℃で2時間撹拌した。反応混合物を水に注ぎ込み、水層をトルエンで抽出した。一緒にした有機層を食塩水で洗浄し、無水硫酸マグネシウムで乾燥した。この溶液を減圧下で濃縮し、残渣をシリカゲルクロマトグラフィー(ヘプタン)で精製して、化合物(T-6)(52.1g;84%)を得た。
窒素雰囲気下、化合物(T-6)(10.0g)、化合物(T-3)(6.73g)、テトラキス(トリフェニルホスフィン)パラジウム(0.330g)、炭酸カリウム(7.83g)、TBAB(1.83g)、トルエン(50.0ml)、ソルミックス(登録商標)A-11(50.0ml)、および水(50.0ml)を反応器に入れて、3時間加熱還流を行った。反応混合物を水に注ぎ込み、水層をトルエンで抽出した。一緒にした有機層を水で洗浄し、無水硫酸マグネシウムで乾燥した。この溶液を減圧下で濃縮し、残渣をシリカゲルクロマトグラフィー(ヘプタン)で精製して、化合物(T-7)(6.79g;56%)を得た。
化合物(T-7)(6.79g)、パラジウムカーボン触媒(5%Pd/CのNXタイプ(50%湿潤品);エヌ・イー・ケムキャット製;0.340g)、トルエン(50.0ml)、およびIPA(50.0ml)を反応器に入れ、水素雰囲気下で8時間撹拌した。濾過により触媒を除去したのち、減圧下で濃縮し、残渣をシリカゲルクロマトグラフィー(ヘプタン)で精製した。さらにソルミックス(登録商標)A-11からの再結晶により精製して、化合物(No.1-2-2)(5.08g;75%)を得た。
転移温度:C 31.1 I.
上限温度(TNI)=-0.3℃;光学的異方性(Δn)=0.117;誘電率異方性(Δε)=19.4;短軸方向の誘電率(ε⊥)=9.2;粘度(η)=38.9mPa・s.
[実施例2]
窒素雰囲気下、化合物(T-6)(10.0g)、化合物(T-8)(6.86g)、テトラキス(トリフェニルホスフィン)パラジウム(0.330g)、炭酸カリウム(7.83g)、TBAB(1.83g)、トルエン(70.0ml)、ソルミックス(登録商標)A-11(70.0ml)、および水(70.0ml)を反応器に入れて、3時間加熱還流を行った。反応混合物を水に注ぎ込み、水層をトルエンで抽出した。一緒にした有機層を水で洗浄し、無水硫酸マグネシウムで乾燥した。この溶液を減圧下で濃縮し、残渣をシリカゲルクロマトグラフィー(体積比、ヘプタン:トルエン=2:1)で精製した。さらにヘプタンとトルエンとの混合溶媒(体積比、1:1)からの再結晶により精製して、化合物(No.1-2-19)(8.14g;67%)を得た。
転移温度:C 101 I.
上限温度(TNI)=33.7℃;光学的異方性(Δn)=0.157;誘電率異方性(Δε)=21.9;短軸方向の誘電率(ε⊥)=8.5;粘度(η)=55.5mPa・s.
[実施例3]
化合物(T-4)(10.0g)および化合物(T-9)(7.63g)を原料として用い、実施例1の第3工程と同様の手法により、化合物(T-10)(9.45g;67%)を得た。
化合物(T-10)(6.00g)および化合物(T-11)(3.16g)を原料として用い、実施例2の第1工程と同様の手法により、化合物(1-2-10)(3.70g;52%)を得た。
転移温度:C 44.8 I.
上限温度(TNI)=-0.3℃;光学的異方性(Δn)=0.117;誘電率異方性(Δε)=27.2;短軸方向の誘電率(ε⊥)=8.5;粘度(η)=51.5mPa・s.
[実施例4]
窒素雰囲気下、ジブロモジフルオロメタン(18.7g)およびTHF(55.0ml)を反応器に入れ、-10℃に冷却した。そこへトリスジエチルアミノホスフィン(44.1g)のTHF(100ml)溶液をゆっくりと加え、室温に戻しつつ1時間撹拌した。次にP. Kirsch et al., European Journal of Organic Chemistry. 2008, 20, 3479.に記載された手法に従い合成した化合物(T-12)(10.0g)のTHF(45.0ml)溶液をゆっくりと加え、5時間撹拌した。反応混合物を氷水に注ぎ込み、水層をヘプタンで抽出した。一緒にした有機層を3N塩酸、食塩水で順次洗浄し、無水硫酸マグネシウムで乾燥した。この溶液を減圧下で濃縮し、残渣をシリカゲルクロマトグラフィー(ヘプタン)で精製して、化合物(T-13)(10.0g;87%)を得た。
窒素雰囲気下、化合物(T-13)(10.0g)およびクロロホルム(130ml)を反応器に入れ、-10℃に冷却した。そこへ臭素(2.09ml)のクロロホルム(20.0ml)溶液をゆっくりと加え、室温に戻しつつ30分間撹拌した。反応混合物を水に注ぎ込み、水層をジクロロメタンで抽出した。一緒にした有機層を飽和チオ硫酸ナトリウム水溶液、水で順次洗浄し、無水硫酸マグネシウムで乾燥した。この溶液を減圧下で濃縮し、残渣をシリカゲルクロマトグラフィー(体積比、ヘプタン:酢酸エチル=20:1)で精製して、化合物(T-14)(15.7g;97%)を得た。
窒素雰囲気下、化合物(T-15)(20.0g)、化合物(T-16)(21.6g)、テトラキス(トリフェニルホスフィン)パラジウム(1.34g)、酢酸カリウム(21.6g)、および1,4-ジオキサン(100ml)を反応器に入れて、100℃で3時間撹拌した。反応混合物を水に注ぎ込み、水層をトルエンで抽出した。一緒にした有機層を食塩水で洗浄し、無水硫酸マグネシウムで乾燥した。この溶液を減圧下で濃縮し、残渣をシリカゲルクロマトグラフィー(トルエン)で精製した。さらにヘプタンからの再結晶により精製して、化合物(T-17)(13.0g;55%)を得た。
窒素雰囲気下、ジクロロビス(トリフェニルホスフィン)パラジウム(0.430g)、トリフェニルホスフィン(0.322g)、およびIPA(30.0ml)を反応器に入れて、1時間加熱還流を行った。次に化合物(T-17)(6.88g)、化合物(T-18)(4.27g)、炭酸カリウム(5.65g)、TBAB(1.32g)、およびIPA(70.0ml)を加え、5時間加熱還流を行った。反応混合物を3N塩酸(100ml)に注ぎ込み、水層をトルエンで抽出した。一緒にした有機層を食塩水で洗浄し、無水硫酸マグネシウムで乾燥した。この溶液を減圧下で濃縮し、残渣をシリカゲルクロマトグラフィー(体積比、トルエン:酢酸エチル=10:1)で精製して、化合物(T-19)(6.72g;99%)を得た。
化合物(T-14)(7.33g)および化合物(T-19)(6.48g)を原料として用い、実施例1の第3工程と同様の手法により、化合物(T-20)(5.20g;53%)を得た。
化合物(T-20)(5.20g)、パラジウムカーボン触媒(5%Pd/CのEタイプ(50%湿潤品);エヌ・イー・ケムキャット製;0.520g)、トルエン(26.0ml)、およびIPA(26.0ml)を反応器に入れ、水素雰囲気下、50℃で48時間撹拌した。濾過により触媒を除去したのち、減圧下で濃縮し、残渣をシリカゲルクロマトグラフィー(体積比、ヘプタン:酢酸エチル=10:1)で精製した。さらにIPAと酢酸エチルとの混合溶媒(体積比、1:1)からの再結晶により精製して、化合物(No.1-3-16)(1.74g;33%)を得た。
転移温度:C 55.6 SA 130 N 222 I.
上限温度(TNI)=145℃;光学的異方性(Δn)=0.130;誘電率異方性(Δε)=12.8;短軸方向の誘電率(ε⊥)=5.8;粘度(η)=74.2mPa・s.
[実施例5]
化合物(T-6)(4.00g)および化合物(T-21)(3.13g)を原料として用い、実施例2の第1工程と同様の手法により、化合物(1-4-1)(2.87g;50%)を得た。
転移温度:C 117 SA 136 N 169 I.
上限温度(TNI)=116℃;光学的異方性(Δn)=0.179;誘電率異方性(Δε)=21.9;短軸方向の誘電率(ε⊥)=4.5;粘度(η)=54.3mPa・s.
[実施例6]
化合物(T-6)(4.00g)および化合物(T-22)(3.20g)を原料として用い、実施例2の第1工程と同様の手法により、化合物(1-4-21)(4.97g;86%)を得た。
転移温度:C 72.0 N 158 I.
上限温度(TNI)=113℃;光学的異方性(Δn)=0.150;誘電率異方性(Δε)=16.8;短軸方向の誘電率(ε⊥)=5.8;粘度(η)=63.8mPa・s.
[実施例7]
窒素雰囲気下、化合物(T-23)(15.0g)、化合物(T-24)(11.7g)、炭酸カリウム(12.5g)、およびDMF(100ml)を反応器に入れて、120℃で7時間撹拌した。反応混合物を水に注ぎ込み、水層をトルエンで抽出した。一緒にした有機層を食塩水で洗浄し、無水硫酸マグネシウムで乾燥した。この溶液を減圧下で濃縮し、残渣をシリカゲルクロマトグラフィー(ヘプタン)で精製して、化合物(T-25)(15.9g;69%)を得た。
化合物(T-25)(15.9g)を原料として用い、実施例1の第2工程と同様の手法により、化合物(T-26)(12.5g;68%)を得た。
化合物(T-6)(4.71g)および化合物(T-26)(5.00g)を原料として用い、実施例2の第1工程と同様の手法により、化合物(1-4-38)(4.24g;59%)を得た。
転移温度:C 103 N 144 I.
上限温度(TNI)=111℃;光学的異方性(Δn)=0.157;誘電率異方性(Δε)=11.8;短軸方向の誘電率(ε⊥)=8.5;粘度(η)=80.6mPa・s.
[実施例8]
窒素雰囲気下、化合物(T-27)(50.0g)、化合物(T-28)(62.4g)、PTSA(パラトルエンスルホン酸一水和物)(6.69g)、およびトルエン(250ml)を反応器に入れて、留出してくる水を除去しつつ、2時間加熱還流を行った。反応混合物を水で洗浄し、無水硫酸マグネシウムで乾燥した。この溶液を減圧下で濃縮し、残渣をシリカゲルクロマトグラフィー(体積比、ヘプタン:トルエン=1:1)で精製して、化合物(T-29)(71.6g;84%)を得た。
窒素雰囲気下、化合物(T-29)(35.0g)およびTHF(450ml)を反応器に入れ、-70℃に冷却した。そこへsec-ブチルリチウム(1.01M;シクロヘキサン、n-ヘキサン溶液;172ml)をゆっくりと加え1時間撹拌した。次にヨウ素(47.7g)のTHF(270ml)溶液をゆっくりと加え、室温に戻しつつ8時間撹拌した。反応混合物を水に注ぎ込み、水層をトルエンで抽出した。一緒にした有機層を飽和チオ硫酸ナトリウム水溶液、食塩水で順次洗浄し、無水硫酸マグネシウムで乾燥した。この溶液を減圧下で濃縮し、残渣をシリカゲルクロマトグラフィー(体積比、ヘプタン:トルエン=1:1)で精製した。さらにヘプタンからの再結晶により精製して、化合物(T-30)(37.6g;71%)を得た。
化合物(T-6)(30.0g)を原料として用い、実施例4の第3工程と同様の手法により、化合物(T-31)(26.9g;79%)を得た。
化合物(T-30)(23.6g)および化合物(T-31)(26.9g)を原料として用い、実施例2の第1工程と同様の手法により、化合物(1-4-54)(27.2g;83%)を得た。
転移温度:C 117 N 138 I.
上限温度(TNI)=114℃;光学的異方性(Δn)=0.157;誘電率異方性(Δε)=29.9;短軸方向の誘電率(ε⊥)=4.5;粘度(η)=73.5mPa・s.
[実施例9]
窒素雰囲気下、化合物(1-4-54)(24.2g)、ギ酸(121ml)、TBAB(4.55g)、およびトルエン(240ml)を反応器に入れて、72時間撹拌した。反応混合物を水に注ぎ込み、水層をトルエンで抽出した。一緒にした有機層を飽和炭酸水素ナトリウム水溶液、食塩水で順次洗浄し、無水硫酸マグネシウムで乾燥した。この溶液を減圧下で濃縮し、残渣をシリカゲルクロマトグラフィー(体積比、ヘプタン:トルエン=1:2)で精製して、化合物(T-32)(17.0g;87%)を得た。
化合物(T-32)(17.0g)および化合物(T-33)(22.0g)を原料として用い、実施例1の第1工程と同様の手法により、化合物(T-34)(19.7g;99%)を得た。
化合物(T-34)(19.7g)を原料として用い、実施例1の第5工程と同様の手法により、化合物(T-35)(17.7g;88%)を得た。
化合物(T-35)(17.7g)を原料として用い、実施例9の第1工程と同様の手法により、化合物(T-36)(14.4g;89%)を得た。
化合物(T-36)(3.00g)およびメチルトリフェニルホスホニウムブロミド(2.91g)を原料として用い、実施例1の第1工程と同様の手法により、化合物(1-2-15)(2.01g;67%)を得た。
転移温度:C 37.5 I.
上限温度(TNI)=9.0℃;光学的異方性(Δn)=0.130;誘電率異方性(Δε)=18.9;短軸方向の誘電率(ε⊥)=8.5;粘度(η)=29.7mPa・s.
[実施例10]
化合物(T-4)(10.0g)および化合物(T-37)(9.31g)を原料として用い、実施例1の第3工程と同様の手法により、化合物(T-38)(13.9g;89%)を得た。
化合物(T-38)(4.15g)を原料として用い、実施例2の第1工程と同様の手法により、化合物(1-5-21)(2.44g;50%)を得た。
転移温度:C 74.4 N 122 I.
上限温度(TNI)=85.0℃;光学的異方性(Δn)=0.184;誘電率異方性(Δε)=23.9;短軸方向の誘電率(ε⊥)=7.8;粘度(η)=78.8mPa・s.
[実施例11]
化合物(T-38)(5.00g)およびWO2009/150966A1に記載された手法に従い合成した化合物(T-39)(3.82g)を原料として用い、実施例2の第1工程と同様の手法により、化合物(1-7-2)(3.92g;55%)を得た。
転移温度:C 94.5 N 256 I.
上限温度(TNI)=174℃;光学的異方性(Δn)=0.190;誘電率異方性(Δε)=17.9;短軸方向の誘電率(ε⊥)=5.2;粘度(η)=94.8mPa・s.
比較化合物として、化合物(S-1)を合成した。この化合物は、特開2002-327175号公報に記載されており、本発明の化合物に類似しているからである。
転移温度:C 80.3 I.
上限温度(TNI)=35.0℃;光学的異方性(Δn)=0.144;誘電率異方性(Δε)=19.6;短軸方向の誘電率(ε⊥)=5.2;粘度(η)=19.6mPa・s.
比較化合物として、化合物(S-2)を合成した。この化合物は、特開平10-251186号公報に記載されており、本発明の化合物に類似しているからである。
転移温度:C 67.1 SA 93.8 N 188 I.
上限温度(TNI)=156℃;光学的異方性(Δn)=0.170;誘電率異方性(Δε)=19.2;短軸方向の誘電率(ε⊥)=3.8;粘度(η)=55.2mPa・s.
比較化合物として、化合物(S-3)を合成した。この化合物は、特開2002-80452号公報に記載されており、本発明の化合物に類似しているからである。
転移温度:C 53.8 I.
上限温度(TNI)=3.7℃;光学的異方性(Δn)=0.0703;誘電率異方性(Δε)=16.4;短軸方向の誘電率(ε⊥)=7.2;粘度(η)=71.8mPa・s.
実施例により本発明の液晶組成物(1)を詳細に説明する。実施例における化合物は、下記の表2の定義に基づいて記号により表した。表2において、1,4-シクロヘキシレンに関する立体配置はトランスである。実施例において記号の後にあるかっこ内の番号は化合物の番号に対応する。(-)の記号はその他の液晶性化合物を意味する。液晶性化合物の割合(百分率)は、液晶組成物の重量に基づいた重量百分率(重量%)である。最後に、組成物の物性値をまとめた。物性は、先に記載した方法にしたがって測定し、測定値を(外挿することなく)そのまま記載した。
3-B(2F,3F)BXB(F,F)-F (1-2-2) 17%
3-H2HB(F,F)-F (3-15) 8%
5-H2HB(F,F)-F (3-15) 8%
3-HBB(F,F)-F (3-24) 21%
5-HBB(F,F)-F (3-24) 20%
3-H2BB(F,F)-F (3-27) 10%
5-HHBB(F,F)-F (4-6) 3%
5-HHEBB-F (4-17) 2%
3-HH2BB(F,F)-F (4-15) 3%
1O1-HBBH-4 (15-1) 4%
1O1-HBBH-5 (15-1) 4%
NI=83.2℃;Δn=0.123;Δε=11.0;η=36.9mPa・s.
上記組成物100部に化合物(Op-05)を0.25部添加したときのピッチは61.7μmであった。
2O-B(2F,3F)BXB(F,F)-F (1-2-19) 5%
2-HB-C (5-1) 5%
3-HB-C (5-1) 12%
3-HB-O2 (13-5) 15%
2-BTB-1 (13-10) 3%
3-HHB-F (3-1) 4%
3-HHB-1 (14-1) 8%
3-HHB-O1 (14-1) 5%
3-HHB-3 (14-1) 14%
3-HHEB-F (3-10) 4%
5-HHEB-F (3-10) 4%
2-HHB(F)-F (3-2) 7%
3-HHB(F)-F (3-2) 7%
5-HHB(F)-F (3-2) 7%
NI=98.4℃;Δn=0.104;Δε=5.1;η=19.2mPa・s.
3-HB(2F,3F)BXB(F,F)-F (1-4-21) 4%
5-HB-CL (2-2) 16%
3-HH-4 (13-1) 12%
3-HH-5 (13-1) 4%
3-HHB-CL (3-1) 3%
4-HHB-CL (3-1) 4%
3-HHB(F)-F (3-2) 10%
4-HHB(F)-F (3-2) 9%
5-HHB(F)-F (3-2) 9%
7-HHB(F)-F (3-2) 8%
5-HBB(F)-F (3-23) 4%
1O1-HBBH-5 (15-1) 3%
3-HHBB(F,F)-F (4-6) 2%
4-HHBB(F,F)-F (4-6) 3%
5-HHBB(F,F)-F (4-6) 3%
3-HH2BB(F,F)-F (4-15) 3%
4-HH2BB(F,F)-F (4-15) 3%
NI=114.0℃;Δn=0.093;Δε=4.3;η=21.1mPa・s.
3-HB(2F,3F)BXB(F,F)-F (1-4-21) 4%
3-B(2F,3F)BXB(F,F)-F (1-2-2) 5%
5-HB-F (2-2) 12%
6-HB-F (2-2) 9%
7-HB-F (2-2) 7%
2-HHB-OCF3 (3-1) 7%
3-HHB-OCF3 (3-1) 7%
4-HHB-OCF3 (3-1) 7%
5-HHB-OCF3 (3-1) 5%
3-HH2B-OCF3 (3-4) 4%
5-HH2B-OCF3 (3-4) 4%
3-HH2B(F)-F (3-5) 3%
3-HBB(F)-F (3-23) 10%
5-HBB(F)-F (3-23) 10%
5-HBBH-3 (15-1) 3%
3-HB(F)BH-3 (15-2) 3%
NI=82.6℃;Δn=0.096;Δε=5.0;η=15.2mPa・s.
3-HB(2F,3F)BXB(F,F)-F (1-4-21) 3%
5-HB-CL (2-2) 11%
3-HH-4 (13-1) 8%
3-HHB-1 (14-1) 5%
3-HHB(F,F)-F (3-3) 8%
3-HBB(F,F)-F (3-24) 20%
5-HBB(F,F)-F (3-24) 15%
3-HHEB(F,F)-F (3-12) 10%
5-HHEB(F,F)-F (3-12) 3%
2-HBEB(F,F)-F (3-39) 3%
3-HBEB(F,F)-F (3-39) 5%
5-HBEB(F,F)-F (3-39) 3%
3-HHBB(F,F)-F (4-6) 6%
NI=80.8℃;Δn=0.105;Δε=8.9;η=23.1mPa・s.
3-B(2F,3F)BXB(F,F)-CF3
(1-2-10) 9%
2-HB-C (5-1) 5%
3-HB-C (5-1) 9%
3-HB-O2 (13-5) 12%
2-BTB-1 (13-10) 3%
3-HHB-F (3-1) 4%
3-HHB-1 (14-1) 8%
3-HHB-O1 (14-1) 5%
3-HHB-3 (14-1) 11%
3-HHEB-F (3-10) 4%
5-HHEB-F (3-10) 4%
2-HHB(F)-F (3-2) 7%
3-HHB(F)-F (3-2) 7%
5-HHB(F)-F (3-2) 7%
3-HHB(F,F)-F (3-3) 5%
NI=94.2℃;Δn=0.101;Δε=6.6;η=21.7mPa・s.
3-dhHXB(2F,3F)B(F)-OCF3
(1-3-16) 3%
5-HB-CL (2-2) 14%
3-HH-4 (13-1) 11%
3-HH-5 (13-1) 4%
3-HHB-F (3-1) 4%
3-HHB-CL (3-1) 3%
4-HHB-CL (3-1) 4%
3-HHB(F)-F (3-2) 10%
4-HHB(F)-F (3-2) 9%
5-HHB(F)-F (3-2) 9%
7-HHB(F)-F (3-2) 8%
5-HBB(F)-F (3-23) 4%
1O1-HBBH-5 (15-1) 3%
3-HHBB(F,F)-F (4-6) 2%
4-HHBB(F,F)-F (4-6) 3%
5-HHBB(F,F)-F (4-6) 3%
3-HH2BB(F,F)-F (4-15) 3%
4-HH2BB(F,F)-F (4-15) 3%
NI=118.7℃;Δn=0.093;Δε=4.1;η=21.9mPa・s.
3-BB(2F,3F)BXB(F,F)-F
(1-4-1) 3%
3-HHB(F,F)-F (3-3) 9%
3-H2HB(F,F)-F (3-15) 8%
4-H2HB(F,F)-F (3-15) 8%
5-H2HB(F,F)-F (3-15) 8%
3-HBB(F,F)-F (3-24) 19%
5-HBB(F,F)-F (3-24) 19%
3-H2BB(F,F)-F (3-27) 10%
5-HHBB(F,F)-F (4-6) 3%
5-HHEBB-F (4-17) 2%
3-HH2BB(F,F)-F (4-15) 3%
1O1-HBBH-4 (15-1) 4%
1O1-HBBH-5 (15-1) 4%
NI=99.7℃;Δn=0.118;Δε=9.3;η=35.5mPa・s.
V2-B(2F,3F)BXB(F,F)-F
(1-2-15) 8%
5-HB-F (2-2) 12%
6-HB-F (2-2) 9%
7-HB-F (2-2) 7%
2-HHB-OCF3 (3-1) 7%
3-HHB-OCF3 (3-1) 7%
4-HHB-OCF3 (3-1) 7%
5-HHB-OCF3 (3-1) 5%
3-HH2B-OCF3 (3-4) 4%
5-HH2B-OCF3 (3-4) 4%
3-HHB(F,F)-OCF2H (3-3) 4%
3-HHB(F,F)-OCF3 (3-3) 5%
3-HH2B(F)-F (3-5) 3%
3-HBB(F)-F (3-23) 6%
5-HBB(F)-F (3-23) 6%
5-HBBH-3 (15-1) 3%
3-HB(F)BH-3 (15-2) 3%
NI=79.1℃;Δn=0.092;Δε=5.3;η=14.7mPa・s.
3-B(2F,3F)BXB(F)B(F,F)-F
(1-5-21) 9%
5-HB-CL (2-2) 10%
3-HH-4 (13-1) 8%
3-HHB-1 (14-1) 5%
3-HHB(F,F)-F (3-3) 8%
3-HBB(F,F)-F (3-24) 16%
5-HBB(F,F)-F (3-24) 11%
3-HHEB(F,F)-F (3-12) 10%
4-HHEB(F,F)-F (3-12) 3%
5-HHEB(F,F)-F (3-12) 3%
2-HBEB(F,F)-F (3-39) 3%
3-HBEB(F,F)-F (3-39) 5%5-HBEB(F,F)-F (3-39) 3%
3-HHBB(F,F)-F (4-6) 6%
NI=83.6℃;Δn=0.109;Δε=9.9;η=26.4mPa・s.
3-B(2F,3F)BXB(F)-F (1-2-7) 3%
3-HH-4 (13-1) 4%
3-HBB(F,F)-F (3-24) 31%
5-HBB(F,F)-F (3-24) 31%
3-H2HB(F,F)-F (3-15) 10%
4-H2HB(F,F)-F (3-15) 10%
5-H2HB(F,F)-F (3-15) 8%
3-HHBB(F,F)-F (4-6) 3%
3-HB(2F,3F)BXB(F)-OCF3
(1-4-28) 3%
5-HB-CL (2-2) 15%
7-HB(F,F)-F (2-4) 3%
3-HH-4 (13-1) 10%
3-HH-5 (13-1) 5%
3-HB-O2 (13-5) 14%
3-HHB-1 (14-1) 8%
3-HHB-O1 (14-1) 5%
2-HHB(F)-F (3-2) 7%
3-HHB(F)-F (3-2) 7%
5-HHB(F)-F (3-2) 7%
3-HHB(F,F)-F (3-3) 6%3-H2HB(F,F)-F (3-15) 5%
4-H2HB(F,F)-F (3-15) 5%
3-chB(2F,3F)BXB(F,F)-F
(1-4-47) 3%
5-HB-CL (2-2) 3%
7-HB(F)-F (2-3) 7%
3-HH-4 (13-1) 9%
3-HH-EMe (13-2) 20%
3-HHEB-F (3-10) 8%
5-HHEB-F (3-10) 8%
3-HHEB(F,F)-F (3-12) 10%
4-HHEB(F,F)-F (3-12) 5%
4-HGB(F,F)-F (3-103) 5%
5-HGB(F,F)-F (3-103) 6%
2-H2GB(F,F)-F (3-106) 4%
3-H2GB(F,F)-F (3-106) 5%
5-GHB(F,F)-F (3-109) 7%
1V2-B(2F,3F)BXB(F,F)-CF3
(1-2-18) 3%
3-HH-4 (13-1) 4%
3-HBB(F,F)-F (3-24) 31%
5-HBB(F,F)-F (3-24) 31%
3-H2HB(F,F)-F (3-15) 10%
4-H2HB(F,F)-F (3-15) 10%
5-H2HB(F,F)-F (3-15) 8%
3-HHBB(F,F)-F (4-6) 3%
Claims (14)
- 式(1)で表される化合物。
式(1)において、
R1は、炭素数1~15のアルキルであり、このアルキルにおいて、少なくとも1つの-CH2-は-O-または-S-で置き換えられてもよく、少なくとも1つの-(CH2)2-は-CH=CH-で置き換えられてもよく、これらの基において、少なくとも1つの水素はハロゲンで置き換えられてもよく;
環A1、環A2、環A3、および環A4は独立して、1,4-シクロへキシレン、1,4-シクロヘキセニレン、1,4-フェニレン、2-フルオロ-1,4-フェニレン、2,6-ジフルオロ-1,4-フェニレン、2-クロロ-1,4-フェニレン、2,6-ジクロロ-1,4-フェニレン、2-クロロ-6-フルオロ-1,4-フェニレン、テトラヒドロピラン-2,5-ジイル、1,3-ジオキサン-2,5-ジイル、2,6,7-トリオキサビシクロ[2.2.2]オクタン-1,4-ジイル、ピリミジン-2,5-ジイル、またはピリジン-2,5-ジイルであり;
X1は、ハロゲン、-C≡N、-N=C=S、または少なくとも1つの水素がフッ素で置き換えられた炭素数1~10のアルキル、少なくとも1つの水素がフッ素で置き換えられた炭素数2~10のアルケニル、少なくとも1つの水素がフッ素で置き換えられた炭素数1~9のアルコキシ、または少なくとも1つの水素がフッ素で置き換えられた炭素数2~9のアルケニルオキシであり;
L1およびL2は独立して、水素またはフッ素であり;
Y1およびY2は独立して、フッ素または塩素であり;
W1は、単結合、-(CH2)2-、-CH=CH-、-C≡C-、-COO-、-OCO-、-CH2O-、-OCH2-、または-CF=CF-であり;
Z1、Z2、Z3、およびZ4は独立して、単結合、-(CH2)2-、-CH=CH-、-C≡C-、-COO-、-OCO-、-CF2O-、-CH2O-、-OCH2-、または-CF=CF-であり;
a、b、c、およびdは独立して、0または1であり、a、b、c、およびdの和は、1、2、または3であり;
aが1のときのZ1、bが1のときのZ2、cが1のときのZ3、およびdが1のときのZ4のうち、少なくとも1つは-CF2O-である。 - 請求項1に記載の式(1)において、R1が、炭素数1~15のアルキル、炭素数2~15のアルケニル、炭素数1~14のアルコキシ、または炭素数2~14のアルケニルオキシであり;X1が、フッ素、塩素、-C≡N、-N=C=S、-CH2F、-CHF2、-CF3、-(CH2)2-F、-CH2CF3、-CF2CF3、-(CH2)3-F、-(CH2)2-CF3、-(CF2)3-F、-(CH2)4-F、-(CH2)3-CF3、-(CF2)4-F、-(CF2)5-F、-(CF2)6-F、-(CF2)7-F、-OCH2F、-OCHF2、-OCF3、-O-(CH2)2-F、-OCH2CF3、-OCF2CF3、-O-(CH2)3-F、-O-(CH2)2-CF3、-O-(CF2)3-F、-O(CH2)4-F、-O-(CH2)3-CF3、-O-(CF2)4-F、-O-(CF2)5-F、-O-(CF2)6-F、-CH=CHF、-CH=CF2、-CF=CHF、-CF=CF2、-CH=CHCH2F、-CH=CHCF3、-CF=CHCF3、-CF=CFCF3、-(CH2)2-CH=CF2、-(CH2)2-CF=CF2、-(CH2)2-CH=CHCF3、-(CH2)2-CF=CHCF3、または-(CH2)2-CF=CFCF3である請求項1に記載の化合物。
- 請求項1に記載の式(1)において、R1が、炭素数1~10のアルキル、炭素数2~10のアルケニル、炭素数1~9のアルコキシ、または炭素数2~9のアルケニルオキシであり;X1が、フッ素、塩素、-C≡N、-CF3、-CHF2、-OCF3、-OCHF2、-CH=CHCF3、-CF=CHCF3、または-CF=CFCF3である請求項1に記載の化合物。
- 式(1-1)~(1-7)のいずれか1つで表される、請求項1に記載の化合物。
式(1-1)~(1-7)において、
R1は、炭素数1~10のアルキル、炭素数2~10のアルケニル、または炭素数1~9のアルコキシであり;
環A1、環A2、環A3、および環A4は独立して、1,4-シクロへキシレン、1,4-シクロヘキセニレン、1,4-フェニレン、2-フルオロ-1,4-フェニレン、2,6-ジフルオロ-1,4-フェニレン、テトラヒドロピラン-2,5-ジイル、または1,3-ジオキサン-2,5-ジイルであり;
Z1、Z2、Z3、およびZ4は独立して、単結合、-(CH2)2-、-COO-、-CF2O-、-CH2O-、または-OCH2-であり;
W1は、単結合、-(CH2)2-、または-OCH2-であり;
X1は、フッ素、-CF3、または-OCF3であり;
L1およびL2は独立して、水素またはフッ素であり;
Y1およびY2は独立して、フッ素または塩素であり;
式(1-3)において、Z1およびZ2のうちいずれか一方は-CF2O-であり;
式(1-4)において、Z1およびZ3のうちいずれか一方は-CF2O-であり;
式(1-5)において、Z3およびZ4のうちいずれか一方は-CF2O-であり;
式(1-6)において、Z1、Z2、およびZ3のうちいずれか1つは-CF2O-であり;
式(1-7)において、Z1、Z3、およびZ4のうちいずれか1つは-CF2O-である。 - 式(1-8)~(1-12)のいずれか1つで表される、請求項1に記載の化合物。
式(1-8)~(1-12)において、
R1は炭素数1~10のアルキル、炭素数2~10のアルケニル、または炭素数1~9のアルコキシであり;
環A1、環A2、環A3、および環A4は独立して、1,4-シクロへキシレン、1,4-シクロヘキセニレン、1,4-フェニレン、2-フルオロ-1,4-フェニレン、2,6-ジフルオロ-1,4-フェニレン、テトラヒドロピラン-2,5-ジイル、または1,3-ジオキサン-2,5-ジイルであり;
X1は、フッ素、-CF3、または-OCF3であり;
L1およびL2は独立して、水素またはフッ素である。 - 請求項1~7のいずれか1項に記載の化合物を少なくとも1つ含有する液晶組成物。
- 式(2)~(4)で表される化合物の群から選択される少なくとも1つの化合物をさらに含有する、請求項8に記載の液晶組成物。
式(2)~(4)において、
R11は、炭素数1~10のアルキルまたは炭素数2~10のアルケニルであり、このアルキルおよびアルケニルにおいて、少なくとも1つの水素はフッ素で置き換えられてもよく、少なくとも1つの-CH2-は-O-で置き換えられてもよく;
X11は、フッ素、塩素、-OCF3、-OCHF2、-CF3、-CHF2、-CH2F、-OCF2CHF2、または-OCF2CHFCF3であり;
環B1、環B2、および環B3は独立して、1,4-シクロヘキシレン、1,4-フェニレン、2-フルオロ-1,4-フェニレン、2,6-ジフルオロ-1,4-フェニレン、テトラヒドロピラン-2,5-ジイル、1,3-ジオキサン-2,5-ジイル、またはピリミジン-2,5-ジイルであり;
Z11、Z12、およびZ13は独立して、単結合、-CH2CH2-、-CH=CH-、-C≡C-、-COO-、-CF2O-、-OCF2-、-CH2O-、または-(CH2)4-であり;
L11およびL12は独立して、水素またはフッ素である。 - 式(5)で表される化合物の群から選択される少なくとも1つの化合物をさらに含有する、請求項8または請求項9に記載の液晶組成物。
式(5)において、
R12は、炭素数1~10のアルキルまたは炭素数2~10のアルケニルであり、このアルキルおよびアルケニルにおいて、少なくとも1つの水素はフッ素で置き換えられてもよく、少なくとも1つの-CH2-は-O-で置き換えられてもよく;
X12は、-C≡Nまたは-C≡C-C≡Nであり;
環C1は、1,4-シクロヘキシレン、1,4-フェニレン、2-フルオロ-1,4-フェニレン、2,6-ジフルオロ-1,4-フェニレン、テトラヒドロピラン-2,5-ジイル、1,3-ジオキサン-2,5-ジイル、またはピリミジン-2,5-ジイルであり;
Z14は、単結合、-CH2CH2-、-C≡C-、-COO-、-CF2O-、-OCF2-、または-CH2O-であり;
L13およびL14は独立して、水素またはフッ素であり;
iは、1、2、3、または4である。 - 式(6)~(12)で表される化合物の群から選択される少なくとも1つの化合物をさらに含有する、請求項8~10のいずれか1項に記載の液晶組成物。
式(6)~(12)において、
R13およびR14は独立して、炭素数1~10のアルキルまたは炭素数2~10のアルケニルであり、このアルキルおよびアルケニルにおいて、少なくとも1つの-CH2-は-O-で置き換えられてもよく;
R15は、水素、フッ素、炭素数1~10のアルキル、または炭素数2~10のアルケニルであり、このアルキルおよびアルケニルにおいて、少なくとも1つの-CH2-は-O-で置き換えられてもよく、少なくとも1つの水素はフッ素で置き換えられてもよく;
S11は、水素またはメチルであり;
Xは、-CF2-、-O-、または-CHF-であり;
環D1、環D2、環D3、および環D4は独立して、1,4-シクロヘキシレン、1,4-シクロヘキセニレン、少なくとも1つの水素がフッ素で置き換えられてもよい1,4-フェニレン、テトラヒドロピラン-2,5-ジイル、またはデカヒドロナフタレン-2,6-ジイルであり;
環D5および環D6は独立して、1,4-シクロヘキシレン、1,4-シクロヘキセニレン、1,4-フェニレン、テトラヒドロピラン-2,5-ジイル、またはデカヒドロナフタレン-2,6-ジイルであり;
Z15、Z16、Z17、およびZ18は独立して、単結合、-CH2CH2-、-COO-、-CH2O-、-OCF2-、または-OCF2CH2CH2-であり;
L15およびL16は独立して、フッ素または塩素であり;
j、k、m、n、p、q、r、およびsは独立して、0または1であり、k、m、n、およびpの和は、1または2であり、q、r、およびsの和は、0、1、2、または3であり、tは、1、2、または3である。 - 式(13)~(15)で表される化合物の群から選択される少なくとも1つの化合物をさらに含有する、請求項8~11のいずれか1項に記載の液晶組成物。
式(13)~(15)において、
R16およびR17は独立して、炭素数1~10のアルキルまたは炭素数2~10のアルケニルであり、このアルキルおよびアルケニルにおいて、少なくとも1つの-CH2-は-O-で置き換えられてもよく、少なくとも1つの水素はフッ素で置き換えられてもよく;
環E1、環E2、環E3、および環E4は独立して、1,4-シクロヘキシレン、1,4-フェニレン、2-フルオロ-1,4-フェニレン、2,5-ジフルオロ-1,4-フェニレン、またはピリミジン-2,5-ジイルであり;
Z19、Z20、およびZ21は独立して、単結合、-CH2CH2-、-CH=CH-、-C≡C-、または-COO-である。 - 重合可能な化合物、光学活性化合物、酸化防止剤、紫外線吸収剤、光安定剤、熱安定剤、および消泡剤の少なくとも1つをさらに含有する、請求項8~12に記載の液晶組成物。
- 請求項8~13のいずれか1項に記載の液晶組成物を含有する液晶表示素子。
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Also Published As
Publication number | Publication date |
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KR20150123848A (ko) | 2015-11-04 |
JPWO2014129268A1 (ja) | 2017-02-02 |
EP2960226A4 (en) | 2016-12-07 |
US20150376504A1 (en) | 2015-12-31 |
EP2960226B1 (en) | 2018-09-26 |
CN105143164B (zh) | 2018-05-15 |
TWI626298B (zh) | 2018-06-11 |
JP6213556B2 (ja) | 2017-10-18 |
US10023799B2 (en) | 2018-07-17 |
TW201435049A (zh) | 2014-09-16 |
EP2960226A1 (en) | 2015-12-30 |
CN105143164A (zh) | 2015-12-09 |
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