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CN105348849B - A kind of azoic dye and dye liquid crystal compound - Google Patents

A kind of azoic dye and dye liquid crystal compound Download PDF

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Publication number
CN105348849B
CN105348849B CN201510653872.2A CN201510653872A CN105348849B CN 105348849 B CN105348849 B CN 105348849B CN 201510653872 A CN201510653872 A CN 201510653872A CN 105348849 B CN105348849 B CN 105348849B
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formula
liquid crystal
dye
compound
expression
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CN105348849A (en
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王培祥
刘录
唐志林
房凤梅
徐亮
李梅花
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Yantai Xianhua Technology Group Co.,Ltd.
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YANTAI XIANHUA CHEM-TECH Co Ltd
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Abstract

The present invention relates to a kind of azoic dye and dye liquid crystal compound, azoic dye has following structural formula:The azoic dye that the present invention is provided shows that character is beautiful, and good with liquid crystal mixed stability, in liquid crystal, dissolubility is good, can be widely used in mixed liquid crystal material.

Description

A kind of azoic dye and dye liquid crystal compound
Technical field
The present invention relates to a kind of azoic dye and dye liquid crystal compound, belong to technical field of organic synthesis.
Background technology
The species of dyestuff is various, good stability, and the dyestuff that can be used in liquid crystal material needs to carry out from numerous dyestuffs Screening sets.Dye liquid crystal is master-guest's form, nematic liquid crystal as main body display material, dyestuff as additive, with liquid Brilliant material is miscible, and in the case of energization, liquid crystal molecular movement can drive the molecule of dyestuff to move together, reach display effect, Therefore it is required that liquid crystal dyestuff can have good intermiscibility with liquid crystal, molecular structure is similar to liquid crystal molecule structure, and has very well Chemistry, light, heat endurance.Heterogeneous colours liquid crystal is high with its contrast, and it is clear to show, the characteristic such as display content is attractive in appearance, and one High-end product --- the favor of-automobile instrument is directly subject to.In liquid crystal heterogeneous colours, azo compound is with its molecular structure Into bar-shaped, good with liquid crystal material amalgamation, good stability is widely used on dye liquid crystal.
Liquid crystal dyestuff has azo, Anthraquinones, azines and oxa anthracenes etc., it is desirable to can have very well with liquid crystal composition Intermiscibility, be added in mixed liquid crystal, do not reduce the stability of mixed liquid crystal material.Under liquid crystal material power-up field action, Twisting can be synchronized with liquid crystal molecule, be equally directed to swear with liquid crystal molecule, when showing, there can be very bright face Color, colourless under closed mode.
Domestic and foreign literature also has the azo dyes report of dependency structure:
These compounds all have the performance of dyestuff, but when used in liquid crystal, have certain defect, some display words Symbol is not beautiful enough, and having bad with mixed liquid crystal dissolubility, the stability to liquid crystal is poor, the invention provides a kind of azo Compound dyestuff, good with mixed liquid crystal intermiscibility, stability is high, can be widely used on mixed liquid crystal material.
Content of the invention
The deficiency that the present invention is present for heterogeneous colours compound in available liquid crystal, there is provided a kind of azoic dye and dye Feed liquid crystal composite.
The technical scheme that the present invention solves above-mentioned technical problem is as follows:
A kind of azoic dye, it is characterised in that its chemical structural formula is as follows:
N is 0,1 or 2;D is-NH2、-NO2、-OH、-F、-Cl、-H;Alkyl or alkoxyl of the E for C1-C12.
Further, its chemical structural formula is as follows:
The azoic dye that the present invention is provided, its advantage are as follows:The azoic dye that the present invention is provided shows character Beautiful, good with liquid crystal mixed stability, in liquid crystal, dissolubility is good, can be widely used in mixed liquid crystal material.
The present invention is also claimed a kind of dye liquid crystal compound, including below formula compound:
In formula (I)~(V), the alkyl of the expression C1-C12 of R independences, alkoxyl or thiazolinyl, the expression 1 or 2 of m independences, The expression 0,1 or the expression of 2, A independence of g independencesOrThe table of X, Y, Z, W independence Show-F ,-Cl or-H, the alkyl or alkoxyl of the independent expression C1-C12 of R ', the expression-COO- or singly-bound of L independences, formula (G) In, n is 0,1 or 2;Expression-the NH of D independences2、-NO2、-OH、-F、-Cl、-H;The alkyl or alcoxyl of the expression C1-C12 of E independences Base;
In above-mentioned composition, the ratio of each component is as follows:By weight, the chemical combination that there is formula (I) one or more Thing:0~40%;The compound that there is formula (II) one or more:5~80%;The change that there is formula (III) one or more Compound:3~50%;The compound that there is formula (IV) one or more:0~50%;There is formula (V) one or more Compound:0~30%;The dye composition that there is formula (G) one or more:0.3~15%.
Further, the compound with formula (I) is:
Further, the compound with formula (II) is:
Further, the compound with formula (III) is:
Further, the compound with formula (IV) is:
Further, the compound with formula (V) is:
Further, the compound with formula (G) is:
Further, a kind of dye liquid crystal compound, it is characterised in that by weight, each component in the composition Ratio is as follows:
The compound that there is formula (I) one or more:3~25%;
The compound that there is formula (II) one or more:10~50%;
The compound that there is formula (III) one or more:12~40%;
The compound that there is formula (IV) one or more:5~40%;
The compound that there is formula (V) one or more:3~20%;
The dye composition that there is formula (G) one or more:0.5~8%.
The invention has the beneficial effects as follows:Liquid-crystal composition low temperature performance well, temperature range width, refractive index are big, good stability, Can be used for the display of onboard instruments.
The synthetic route of the azoic dye that the present invention is provided is as follows:
The dye is described by taking the synthesis of 1- (4 '-(4 "-amino-phenylazo)-phenylazo) -4- epoxide in heptan naphthalenes as an example below The synthetic method of material:
1) synthesis to two ammonium of benzene
15.0 grams (0.109mol) are added in the 250ml there-necked flasks for being furnished with mechanical agitation, thermometer, condenser to nitre Base aniline, 100.0ml DMF, 0.2 gram of Pd/C (5wt%) heat to 60--65 DEG C while stirring, are passed through thereto high-purity Hydrogen, insulation reaction 1.5 hours while stirring, TLC detection raw materials are not detected, and are filtered, and filtrate concentrates, and concentrate is cooled to 0 DEG C Left and right, adds 0 DEG C or so of isopropanol, filters, and dries, obtains 11.22 grams of bronzing p-phenylenediamine product (0.104mol), yield 96.0%.
2) synthesis of 4- (4 '-nitro-azobenzene)-aniline
To with mechanical agitation, add step 1 in the 500ml there-necked flasks of thermometer) in obtain to two ammonium product of benzene It is 5mol/L watery hydrochloric acid with 250.0ml concentration, is cooled to -5 DEG C of temperature while stirring -- 0 DEG C, slowly dripped with constant pressure funnel Solubilization maintains the temperature at -5 DEG C in 7.11 grams of (0.103mol) sodium nitrite in aqueous solution of 40.0ml water, dropwise addition process -- and 0 DEG C, drop Add after finishing in 0--5 DEG C of insulated and stirred 60 minutes, be added dropwise to the urea that 10 grams (0.166mol) are dissolved in 40.0ml water, stirring 0.5 Hour, the dilute hydrochloric acid solution that 14.35 grams of (0.104mol) paranitroanilinum are dissolved in 50.0ml 5mol/L is added dropwise, after completion of dropping Continue reaction 0.5 hour, low temperature with unsaturated carbonate potassium solution neutralize, filter, obtain sediment, be vacuum dried, obtain product 4- (4 '- Nitro-azobenzene) 24.44 grams of-aniline (0.101mol), yield 97.1%.
3) synthesis of 4- amino -1- naphthalene heptyl ethers
30.00 grams of (0.153mol) 4- are added in mechanical agitation, thermometer, the 500ml there-necked flasks of condenser Amino -1- naphthalenol hydrochlorides, add 200.0ml DMF, add 30.00 grams of (0.217mol) potassium carbonate, add 1.00 grams of 18- Crown- 6, is heated while stirring, treats that temperature rises to 70 DEG C -- and 75 DEG C, it is added dropwise with constant pressure funnel and is dissolved in 50.0ml DMF's 35.00 grams of (0.154mol) 1- iodine heptane, after completion of dropping, continue reaction 4.5 hours, and reaction terminates, and filters, and concentration is dried, Obtain 38.43 grams of product 4- amino -1- naphthalene heptyl ethers (1.3.3) (0.149mol), yield 97.3%.
4) synthesis of 1- (4 '-(4 "-nitro-phenylazo)-phenylazo) -4- epoxide in heptan naphthalenes
4- (4 '-nitros-idol are added in the 1000ml there-necked flasks for being furnished with mechanical agitation, thermometer, constant pressure funnel Pyridine)-aniline and 500.0ml 5mol/L watery hydrochloric acid, be cooled to 0--5 DEG C while stirring, be added dropwise with constant pressure funnel 9.00 grams of natrium nitrosums for being dissolved in 60.0ml water, are added dropwise 0--5 DEG C of process control temp, after completion of dropping, continue stirring 0.5 little When, during 10.00 grams of (0.166) urea for being dissolved in 40.0ml water are also added dropwise into mixed reaction solution, continue stirring 0.5 hour, drop Plus 26.08 grams (0.101mol) is dissolved in the product (1.3.3) of 200.0ml acetic acid, after completion of dropping, temperature is controlled at 0--5 DEG C, Reaction 3.5 hours.After completion of the reaction, the wet chemical adjustment PH with saturation is filtered, sediment isopropyl to alkalescent Alcohol:Water=1:2 mixed solvent recrystallization, be vacuum dried product 1- (4 '-(4 "-nitro-phenylazo)-phenylazo)- 43.10 grams of naphthalene of 4- epoxides in heptan (0.087mol), yield 86.1%.
5) synthesis of 1- (4 '-(4 "-amino-phenylazo)-phenylazo) -4- epoxide in heptan naphthalenes
To in the 1L there-necked flasks for being furnished with mechanical agitation, thermometer, condenser add step 4) in gained product, add 300.0ml DMF, heat while stirring, when temperature rises to 55 DEG C -- 0.45 gram 5% of Pd/C when 60 DEG C, is added, is imported high-purity Hydrogen, reacts 4.5 hours, and TLC is tracked, and filters catalyst after raw material reaction is finished while hot, and filtrate is transferred to the dense sulphur of 130.0ml In the mixture of acid/ice, it is cooled to below room temperature, filters, solids isopropanol:Water=5:8 ratio recrystallization, obtains product 1- (4 '-(4 "-amino-phenylazo)-phenylazo) 23.57 grams of naphthalene of -4- epoxides in heptan (0.0506mol), yield 58.2%.
Description of the drawings
Fig. 1 is the UV absorption of 1- (4 '-(4 "-amino-phenylazo)-phenylazo) -4- epoxide in the heptan naphthalenes of the present invention (wavelength of maximum absorption band is 433nm to spectrogram, and the absorbance of maximum absorption band is for 0.91).
Fig. 2 is that the IR spectrograms of 1- (4 '-(4 "-amino-phenylazo)-phenylazo) -4- epoxide in the heptan naphthalenes of the present invention (go out Peak position is set to 3030~3000cm-1,2810cm-1, 1630~1600cm-1, 1590~1575cm-1, 1480~1470cm-1, 1470~1430cm-1,1300cm-1,1240cm-1,1100cm-1,846cm-1,740cm-1,610cm1, 500~400cm-1).
Fig. 3 is 1- (4 '-(4 "-amino-phenylazo)-phenylazo) -4- epoxide in the heptan naphthalenes of the present invention13C-NMR is composed Figure;Signal data is as follows:
δ 125.8,128.6,142.5,144.1,148.9,154.7,157.5 (s)
δ103.9,115.4,119.9,121.9,123,123.5,125.0,126.2,127.3(d)
δ23.1,26.6,30.2,30.6,32.5,72.7(t)
δ14.0(q)
Specific embodiment
The principle and feature of the present invention are described below in conjunction with example, example is served only for explaining the present invention, and Non- for limiting the scope of the present invention.
The code description of compound used therefor in liquid-crystal composition:
E- ——COO—— T- ——C≡C——
n- CnH2n+1—— On- ——O
V- CH=CH2
nV- CnH2nCH=CH2N- ——CN
nVm- ——CnH2nCH=CHCmH2m+1F- ——F
K- NH2——
The use of compound code is described with instantiation below:
Embodiment 1:
A kind of dye liquid crystal compound, by weight, its formula is as follows:
Sequence number Compound code Ratio
1 2VPEG-N 6
2 2CPEG-N 3
3 4CPEG-N 5
4 5PEG-N 8
5 3CPEG-N 5
6 5CPEG-N 5
7 2PEG-N 3
8 3PEG-N 5
9 4PEG-N 10
10 3UTPP2 5
11 VCP-N 10
12 3PP-N 3
13 5PP-N 5
14 VCC3 12
15 3CPPC5 5
16 3CPPC4 5
17 3CCEPC5 5
KAzAzNpO3 1
KAzAzNhO3 0.5
KAzAzNnO2 0.5
The test physical parameter of above-mentioned composition is as follows:
Test event Test data
Tni(℃) 98
△n(589nm,20℃) 0.205
ne(589nm,20℃) 1.712
no(589nm,20℃) 1.507
△ε(1KHz,25℃) 31.2
ε⊥(1KHz,25℃) 7.8
Vth(25℃,1/1D,1/1B) 1.14
Vsat(25℃,1/1D,1/1B) 1.73
ST 1.52
η(25℃) 56
- 40 DEG C of low-temperature storage pass
Embodiment 2:
A kind of dye liquid crystal compound, by weight, its formula is as follows:
The test physical parameter of above-mentioned composition is as follows:
Test event Test data
Tni(℃) 101
△n(589nm,20℃) 0.260
ne(589nm,20℃) 1.774
no(589nm,20℃) 1.514
△ε(1KHz,25℃) 32.8
ε⊥(1KHz,25℃) 8.3
Vth(25℃,1/1D,1/1B) 1.11
Vsat(25℃,1/1D,1/1B) 1.61
ST 1.45
η(25℃) 52
- 40 DEG C of low-temperature storage pass
Embodiment 3:
A kind of dye liquid crystal compound, by weight, its formula is as follows:
Sequence number Compound code Ratio
1 VCPU-N 5
2 3CPU-N 5
3 3PEG-N 3
4 5PEG-N 5
5 2VPEG-N 5
6 2VPEU-N 3
7 3PTP02 3
8 2UTPP3 5
9 3UTPP2 2
10 4UTPP3 2
11 3UTPP4 3
12 VCP-N 12
13 1VCP-N 8
14 3CP-N 6
15 5PP-N 14
KAzAzNpO7 5
KAzAzNa3 8
KAzAzNhO3 2
The test physical parameter of above-mentioned composition is as follows:
Test event Test data
Tni(℃) 105
△n(589nm,20℃) 0.205
ne(589nm,20℃) 1.719
no(589nm,20℃) 1.514
△ε(1KHz,25℃) 21.2
ε⊥(1KHz,25℃) 5.8
Vth(25℃,1/1D,1/1B) 1.31
Vsat(25℃,1/1D,1/1B) 1.83
ST 1.40
η(25℃) 43
- 40 DEG C of low-temperature storage pass
Embodiment 4:
A kind of dye liquid crystal compound, by weight, its formula is as follows:
The test physical parameter of above-mentioned composition is as follows:
Test event Test data
Tni(℃) 108
△n(589nm,20℃) 0.258
ne(589nm,20℃) 1.768
no(589nm,20℃) 1.510
△ε(1KHz,25℃) 23.3
ε⊥(1KHz,25℃) 5.9
Vth(25℃,1/1D,1/1B) 1.32
Vsat(25℃,1/1D,1/1B) 1.81
ST 1.37
η(25℃) 58
- 40 DEG C of low-temperature storage pass
Embodiment 5:
A kind of dye liquid crystal compound, by weight, its formula is as follows:
Sequence number Compound code Ratio
1 2UTPP3 10
2 4CPTP3 4
3 3CPTP02 4
4 3UTPP4 9
5 3UTPP2 10
6 VCP-N 3
7 VCC3 20
8 3CC4 5
9 5CC3 5
10 VCC5 15
11 VCC4 5
12 3CCEPC4 3
KAzAzNp3 1
KAzAzNpO5 2
KAzAzNpO7 2
The test physical parameter of above-mentioned composition is as follows:
Test event Test data
Tni(℃) 103
△n(589nm,20℃) 0.259
ne(589nm,20℃) 1.773
no(589nm,20℃) 1.514
△ε(1KHz,25℃) 6.3
ε⊥(1KHz,25℃) 3.7
Vth(25℃,1/1D,1/1B) 2.45
Vsat(25℃,1/1D,1/1B) 3.36
ST 1.37
η(25℃) 25
- 40 DEG C of low-temperature storage pass
Embodiment 6:
A kind of dye liquid crystal compound, by weight, its formula is as follows:
The test physical parameter of above-mentioned composition is as follows:
Embodiment 7:
A kind of dye liquid crystal compound, by weight, its formula is as follows:
The test physical parameter of above-mentioned composition is as follows:
Test event Test data
Tni(℃) 108
△n(589nm,20℃) 0.205
ne(589nm,20℃) 1.727
no(589nm,20℃) 1.522
△ε(1KHz,25℃) 3.3
ε⊥(1KHz,25℃) 3.4
Vth(25℃,1/1D,1/1B) 3.45
Vsat(25℃,1/1D,1/1B) 4.86
ST 1.41
η(25℃) 22.1
- 40 DEG C of low-temperature storage pass
Embodiment 8:
A kind of dye liquid crystal compound, by weight, its formula is as follows:
Sequence number Compound code Ratio
1 2VPEU-N 3
2 5PTP03 5
3 3PTP1 3
4 3PTP2 3
5 4PTP03 5
6 3PTP4 3
7 4PTP3 3
8 3CPTP02 3
9 2UTPP3 12
10 3UTPP2 12
11 3UTPP4 15
12 4UTPP3 16
13 VCP-N 5
14 VCC3 7
15 VCC5 5
KAzAzNh3 0.5
KAzAzNpO7 0.5
KAzAzNaO5 0.2
The test physical parameter of above-mentioned composition is as follows:
Test event Test data
Tni(℃) 105
△n(589nm,20℃) 0.260
ne(589nm,20℃) 1.773
no(589nm,20℃) 1.513
△ε(1KHz,25℃) 3.2
ε⊥(1KHz,25℃) 3.4
Vth(25℃,1/1D,1/1B) 3.35
Vsat(25℃,1/1D,1/1B) 4.75
ST 1.42
η(25℃) 26.3
- 40 DEG C of low-temperature storage pass
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all spirit in the present invention and Within principle, any modification, equivalent substitution and improvements that is made etc. are should be included within the protection domain of invention.

Claims (10)

1. a kind of azoic dye, it is characterised in that its chemical structural formula is as follows:
The expression 0,1 or 2 of n independences;Expression-the NH of D independences2、-NO2、-OH、-F、-Cl、-H;The alkane of the expression C1-C12 of E independences Base or alkoxyl.
2. a kind of azoic dye according to claim 1, it is characterised in that its chemical structural formula is:
3. a kind of dye liquid crystal compound, it is characterised in that including the compound of below formula:
In formula (I)~(V), the alkyl of the expression C1-C12 of R independences, alkoxyl or thiazolinyl, the expression 1 or 2 of m independences, g are only Vertical expression 0,1 or the expression of 2, A independence Expression-the F of X, Y, Z, W independence ,- Cl or-H, R ' independent expression C1-C12 alkyl or alkoxyl, the expression-COO- or singly-bound of L independences, in formula (G), n is only Vertical expression 0,1 or 2;Expression-the NH of D independences2、-NO2、-OH、-F、-Cl、-H;The alkyl or alkane of the expression C1-C12 of E independences Epoxide;
In above-mentioned composition, the ratio of each component is as follows:By weight, the compound that there is formula (I) one or more:0~ 40%;The compound that there is formula (II) one or more:5~80%;The compound that there is formula (III) one or more:3 ~50%;The compound that there is formula (IV) one or more:0~50%;The compound that there is formula (V) one or more: 0~30%;The dye composition that there is formula (G) one or more:0.3~15%.
4. a kind of dye liquid crystal compound according to claim 3, it is characterised in that the chemical combination with formula (I) Thing is:
5. a kind of dye liquid crystal compound according to claim 3, it is characterised in that the chemical combination with formula (II) Thing is:
6. a kind of dye liquid crystal compound according to claim 3, it is characterised in that the chemical combination with formula (III) Thing is:
7. a kind of dye liquid crystal compound according to claim 3, it is characterised in that the chemical combination with formula (IV) Thing is:
8. a kind of dye liquid crystal compound according to claim 3, it is characterised in that the chemical combination with formula (V) Thing is:
9. a kind of dye liquid crystal compound according to claim 3, it is characterised in that the chemical combination with formula (G) Thing is:
10. a kind of dye liquid crystal compound according to claim 3, it is characterised in that by weight, the composition The ratio of middle each component is as follows:
The compound that there is formula (I) one or more:3~25%;
The compound that there is formula (II) one or more:10~50%;
The compound that there is formula (III) one or more:12~40%;
The compound that there is formula (IV) one or more:5~40%;
The compound that there is formula (V) one or more:3~20%;
The azoic dye that there is formula (G) one or more:0.5~8%.
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EP3529334B1 (en) * 2016-10-19 2020-10-07 Merck Patent GmbH Liquid-crystalline medium

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* Cited by examiner, † Cited by third party
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CH594897A5 (en) * 1976-06-23 1978-01-31 Bbc Brown Boveri & Cie
DE3529988A1 (en) * 1985-08-22 1987-02-26 Basf Ag TRISAZO DYES AND THEIR USE IN LIQUID CRYSTAL MATERIALS
JPH0517776A (en) * 1991-06-18 1993-01-26 Mitsubishi Kasei Corp Light modulating material and light modulating element containing the same material
JP5029032B2 (en) * 2007-01-23 2012-09-19 三菱化学株式会社 Dichroic dye composition, liquid crystal composition containing the same, and liquid crystal element
CN101698802B (en) * 2009-10-09 2013-03-20 江苏和成显示科技股份有限公司 Liquid crystal mixture with low negative dielectric
CN103347958B (en) * 2011-02-07 2014-11-12 日本化药株式会社 Azo compound, salt thereof, and dye-based polarizing film and polarizing plate containing same
CN103305022A (en) * 2012-03-16 2013-09-18 上海汇友精密化学品有限公司 Azo type direct dye and preparation method thereof

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