WO2005093004A1 - ゲル化制御剤及びゲル化制御方法 - Google Patents
ゲル化制御剤及びゲル化制御方法 Download PDFInfo
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- WO2005093004A1 WO2005093004A1 PCT/JP2005/004694 JP2005004694W WO2005093004A1 WO 2005093004 A1 WO2005093004 A1 WO 2005093004A1 JP 2005004694 W JP2005004694 W JP 2005004694W WO 2005093004 A1 WO2005093004 A1 WO 2005093004A1
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C251/00—Compounds containing nitrogen atoms doubly-bound to a carbon skeleton
- C07C251/02—Compounds containing nitrogen atoms doubly-bound to a carbon skeleton containing imino groups
- C07C251/24—Compounds containing nitrogen atoms doubly-bound to a carbon skeleton containing imino groups having carbon atoms of imino groups bound to carbon atoms of six-membered aromatic rings
Definitions
- the present invention relates to a Gelich control agent capable of controlling the fluidity of a fluidity compound, and a Gellie dagger control method using the gelling control agent.
- Ultrasonic irradiation is known to be used when a low-molecular gelling agent is dissolved in a solvent until it becomes supersaturated. Ultrasonic irradiation is also used to break low-molecular gels in the field of softening and transparency of foods such as pectin in food chemistry, and in the use of low-molecular gelatin in the field of photographic science. I have. As described above, ultrasonic irradiation is generally performed for the purpose of destroying molecular assemblies.
- ultrasonic irradiation may be performed as one method of organic synthesis such as synthesis of a polymer gelling agent. That is, for example, as described in Non-Patent Document 1, when a silicon polymer (silica gel) is produced, tetraalkoxy silicon is hydrolyzed and subjected to dehydration condensation polymerization under ultrasonic irradiation.
- a fluid conjugate obtained in a gel state by a low molecular gelling agent is added. It is known that when heated, it returns to a liquid state. While being pressed, the low-molecular-weight gelling agent, which has been brought into a gel state by using such a low-molecular-weight gelling agent, returns to the gel state again when cooled to room temperature after heating.
- the low-molecular gelling agent when heat energy is injected into the flowable compound in the gel state, the force S temporarily returns to the liquid state S, and when the heat energy is no longer injected, the gel state is restored.
- the reason for this is that the low-molecular gelling agent spontaneously forms a molecular assembly, thereby changing the flowable conjugate to a gel state.
- the low-molecular gelling agent forms a molecular assembly by utilizing van der Waals force, hydrogen bonding, and the like as self-cohesive force. Therefore, at room temperature, the low-molecular-weight gelling agent whose self-aggregation force is relatively larger than the energy of molecular motion of the low-molecular-weight gelling agent easily forms a molecular assembly.
- the low-molecular-weight gelling agent forms a molecular assembly to bring the fluidized conjugate into a gel state, and under high-temperature conditions, the molecular assembly of the low-molecular-weight gelling agent is broken, The flowable compound is in a liquid state.
- Patent Document 1 describes that the gel-forming ability is freely controlled by ultrasonic irradiation. Force gelation and liquefaction are performed reversibly, and the flowability of the fluid compound is reduced. There is no mention of controlling liquidity. Furthermore, chemical substances that can control the fluidity of a fluid compound by reversibly gelling and liquefying the fluid compound using a simple method such as ultrasonic irradiation have been discovered. Not.
- the present invention has been made to solve the above-mentioned conventional problems, and an object thereof is to freely adjust the fluidity of a fluid compound by using a simple method such as ultrasonic irradiation and heat treatment. It is an object of the present invention to provide a gelling control agent and a gelling controlling method which can be controlled in a controlled manner.
- the inventors of the present invention have conducted intensive studies in view of the above problems, and as a result, it has been found that ultrasonic irradiation not only promotes gelling of a fluid liquid compound but also causes liquid state without gelation at room temperature. By irradiating ultrasonic waves to the fluidized conjugate, the fluidity conjugate can be instantaneously gelled, and by combining the ultrasonic irradiation and the heat treatment.
- the present inventors have found a gely-dani control agent capable of reversibly controlling the flowability of a flowable dangling product, and have completed the present invention.
- the geli-dani control agent according to the present invention is a geli-dani control agent added to a flowable compound in order to solve the above-mentioned problems, and is in a liquid state by ultrasonic irradiation.
- the compound is changed to a gel state, and the fluid state of the gel state is changed to a liquid state by heating, and the fluidity state once changed to the liquid state by the heat treatment is changed.
- the material has the property of not changing to a gel state even when the temperature is lowered, and the fluidity of the fluid compound is reversibly controlled by the above-mentioned ultrasonic irradiation and heat treatment. I have.
- the gelled fluidized compound When the gelling control agent is added to a fluid compound, the gelled fluidized compound is heated to a liquid state by heating, and then cooled to room temperature. Even if the gel state is maintained, the liquid state is maintained. Further, by subjecting the fluidized conjugate from the gel state to the liquid state to ultrasonic treatment, the flowable compound can be converted back to the gel state.
- the flowability of the flowable conjugated product under the same temperature conditions such as room temperature conditions can be obtained by a simple technique such as ultrasonic irradiation and heat treatment. It can be controlled reversibly.
- the ultrasonic irradiation and the heat treatment can be controlled electrically, a gelation in which a fluid compound changes from a liquid state to a gel state, and a liquid in which a fluid compound changes from a gel state to a liquid state. Can be easily controlled.
- Ml and M2 each represent a divalent metal
- R1 to R8 each independently represent H or a hydrocarbon group
- n is 5 or 7
- the cyclic polynuclear metal complex is used as a gelling agent, gelling of a polar or non-polar fluid compound and a fluid compound having various steric structures and electronic properties can be performed. This makes it possible to reversibly control the fluidity of the various fluids.
- the R-form and the S-form of the compound represented by the general formula (1) are preferable to include the R-form and the S-form of the compound represented by the general formula (1).
- the compound represented by the above general formula (1) promotes gel formation only when it is chiral, and does not progress gel formation when it is achiral. It is necessary for
- the above-mentioned gelling agent is the same as the above-mentioned gelling controlling agent, except that the above-mentioned general formula (1)
- the metals represented by Ml and M2 are both Pd.
- the above-mentioned geli-dani control agent is the same as the above-mentioned geli-dani control agent, except that the It is preferable that the above-mentioned flowable conjugate is gelled with a number of ultrasonic waves.
- the Gerry-Dani control method of the present invention is a Gerry-Dani control method for controlling the flowability of a flowable compound, and comprises the general formula (1)
- Ml and M2 each independently represent a divalent metal
- R1 to R8 each independently represent H or a hydrocarbon group
- n is 5 or 7
- the method is characterized in that the fluid compound is heated in order to irradiate ultrasonic waves to change the fluid compound in a gel state to a liquid state.
- the fluidity of the fluid compound can be controlled by adding the above-mentioned cyclic polynuclear metal complex to the fluid compound and performing irradiation with ultrasonic waves and heat treatment.
- the gelling control method of the present invention in order to change the flowable compound, which has been changed to a liquid state by the heating, to a gel state again, it is necessary to perform a temperature change process to a low temperature rather than to a low temperature. It is preferable to perform a sound wave irradiation treatment.
- the compound represented by the above general formula (1) has a property that, when the gel state is eliminated by heat treatment, the compound does not gel again even if the temperature is lowered thereafter. Therefore, after the gel state is eliminated by the heat treatment, it is preferable to perform the ultrasonic treatment in order to gel again.
- the gelling control method of the present invention is a method of controlling the gelation rate of a fluid compound by controlling the ultrasonic irradiation time in addition to the above gelling control method. .
- the gel formation rate of the flowable compound can be freely controlled. it can.
- the Gery rig control method of the present invention it is preferable to control the Gy ridge speed of the fluid ligature by controlling the sound pressure of the ultrasonic waves. According to the above method, by controlling the sound pressure of the ultrasonic wave applied to the flowable conjugate having the cyclic polynuclear metal complex added thereto, the gel formation rate of the flowable conjugate can be freely controlled. can do.
- 6 is a graph showing the change over time in the absorbance of a measurement liquid after the measurement.
- FIG. 6 is a view schematically showing a state of gel formation of the compound in the present invention.
- FIG. 8 (a)] of 1. 25 X 10- 3 hexane d solution into M cyclo anti- la super
- FIG. 12 is a graph showing the dependence of mobile-zero on -ln ([anti-la] / [anti-la]) in gel formation after sonication (44 kHz, 5 seconds), showing the ultrasonic irradiation sound per unit area
- FIG. 9 is a view showing a result when the pressure is 0.31 WZcm 2 .
- FIG. 12 is a graph showing the dependence of mobile-zero on -ln ([anti-la] / [anti-la]) in gel formation after sonication (44 kHz, 5 seconds), showing the ultrasonic irradiation sound per unit area
- FIG. 9 is a view showing a result when the pressure is 0.36 WZcm 2 .
- FIG. 12 is a graph showing the dependence of mobile-zero on -ln ([anti-la] / [anti-la]) in gel formation after sonication (44 kHz, 5 seconds), showing the ultrasonic irradiation sound per unit area
- FIG. 9 is a view showing a result when a pressure is 0.41 WZcm 2 .
- FIG. 12 is a graph showing the dependence of mobile-zero on -ln ([anti-la] / [anti-la]) in gel formation after sonication (44 kHz, 5 seconds), showing the ultrasonic irradiation sound per unit area
- FIG. 9 is a view showing a result when the pressure is 0.46 WZcm 2 .
- FIG. 12 is a graph showing the dependence of mobile-zero on -ln ([anti-la] / [anti-la]) in gel formation after sonication (44 kHz, 5 seconds), showing the ultrasonic irradiation sound per unit area
- FIG. 9 is a view showing a result when the pressure is 0.51 WZcm 2 .
- FIG. 9 is a graph showing the results of examining the dependence of the apparent first-order reaction rate constant k ⁇ on the unit sound pressure per unit area, with the sound pressure (WZcm 2 ) as the horizontal axis in this example.
- the gelling controlling agent of the present invention is added to the fluidity conjugate to make the fluidity liquefied compound in a liquid state by ultrasonic irradiation into a gel state (hereinafter, referred to as gelation).
- gelation a gel state
- the property of heating the gelled fluid compound into a liquid state by heating hereinafter, sometimes referred to as liquefaction
- the gelation controlling agent of the present invention is characterized by Once changed to a liquid state by heat treatment, it does not change to a gel state even if the temperature is lowered thereafter.
- the gel state and the liquid state will be described later in detail in Examples.
- the gelling agent of the present invention when the gelling agent of the present invention is added to the flowable conjugate, and the mixture is irradiated with ultrasonic waves, the flowable tangled product can be instantaneously gelled.
- the gel-i-dani control agent is added to the fluidity-dominated product at an extremely low concentration of 0.8 mmol ZL or less (about 1% by weight), the gel-i-dani can be favorably performed.
- the gel formation rate can be controlled by controlling the ultrasonic irradiation time.
- the gelling control agent of the present invention has high responsiveness to ultrasonic irradiation, is excellent in gelling efficiency, and can control the gelling rate of the fluidity conjugate. Things.
- the liquid compound in a liquid state before the ultrasonic irradiation is performed.
- the fluid compound that has been converted to a liquid state by the heat treatment maintains a liquid state without gelling even when cooled to room temperature (about 20 ° C to 25 ° C).
- gelling of the fluidized compound occurs.
- the gelling control agent of the present invention is added to a fluid compound, and is subjected to ultrasonic irradiation and heat treatment, whereby the gelling and liquefaction of the fluid compound are reversibly performed. It is caused by Therefore, by appropriately switching between the ultrasonic irradiation treatment and the heating treatment, the fluidity of the fluidity-conjugated product can be freely controlled. In addition, since the ultrasonic irradiation treatment and the heat treatment can be performed by using an electric device or the like, the fluidity of the fluid compound can be controlled by a simple method.
- the flowable compound is a liquid substance and may be any liquid substance that can dissolve the gelling control agent.
- Specific examples thereof include a liquid organic solvent, an organic compound such as a mixture of the organic solvent, and the like; a solution or a dispersion in which an organic compound is used as a solvent and a solute is dissolved or dispersed in the solvent.
- organic solvent for example, acetone And ketones such as cyclohexanone; esters such as ethyl acetate and methyl acetate; ethers such as 1,4-dioxane and THF (tetrahydrofuran); halogenated compounds such as tetrachlorosilane and chloroform; Saturated hydrocarbons such as cyclohexane and cycloheptane; olefins such as cyclohexene; aromatic hydrocarbons such as benzene, toluene, o-xylene and p-xylene; sulfoxides such as DMSO (dimethylsulfoxide) And the like.
- acetone And ketones such as cyclohexanone
- esters such as ethyl acetate and methyl acetate
- ethers such as 1,4-dioxane and THF (tetrahydrofuran); halogenated compounds such as
- the gelling control agent cannot be dissolved alone (pure solvent), but even a liquid substance can be dissolved by mixing with the organic solvent described above. If it can be used, it can be used as the above-mentioned fluidity conjugate. Specifically, one or more selected from the group consisting of water, alcohols such as methanol and ethanol; -tolyls such as acetonitrile; and linear saturated hydrocarbons such as hexane; A mixed solvent mixed with a solvent can also be used as the fluidity conjugate.
- the gelling control agent of the present invention in the case where the liquid is applied after gelling, in principle, the gelling is not performed unless ultrasonic irradiation is performed again.
- Benzene and cyclohexane have different properties from other solvents. That is, unlike benzene and cyclohexane, which are not gelled unless subjected to ultrasonic irradiation with another solvent, the reactivity of the gelling agent is exceptionally high, and the reaction is extremely slow (stands for several hours). However, they do not irradiate ultrasonic waves.
- gelyidani control agent is specifically represented by the general formula (1)
- Ml and M2 each independently represent a divalent metal, R1 to R8 each independently represent H or a hydrocarbon group, and n is 5 or 7 ), And preferably comprises a cyclic polynuclear metal complex having an anti (anti) conformation.
- the cyclic polynuclear metal complex has the general formula (2)
- R 9 -R 12 each independently represent H or a hydrocarbon group, and n is 5 or 7
- a ligand This is a binuclear metal complex in which the ligand is coordinated to metals Ml and M2.
- the above-mentioned cyclic polynuclear metal complex is composed of two metal Ml, M2 and two aromatic rings containing an aromatic ring. It has a structure in which a plane is connected so as to be trans via two bonding chains-(CR5R6)-and (CR7R8)-which form a spacer.
- the two binding chains (CR5R6) and (CR7R8)- are derived from one (CR11R12)-of a ligand having a structure represented by the general formula (2). .
- the anti conformation refers to a structure in which, when the two planes are viewed from one side, the plane including the metal Ml and the plane including the metal M2 are in a front-to-back relationship with each other. .
- the metals Ml and M2 serving as nuclei of the cyclic polynuclear metal complex are not particularly limited as long as they can form a complex with the ligand to be used, but may be divalent metals. It is good. Specifically, there may be mentioned divalent palladium (Pd), divalent nickel (Ni), divalent platinum (Pt) and the like.
- the metals Ml and M2 may be the same metal or different metals.
- R1-R8 in bissalicylaldiamine which is a ligand of the cyclic polynuclear metal complex is, for example, hydrogen (H); methyl, ethyl, propyl, ipropyl, t Alkyl groups such as butyl group; nitrogen-containing groups such as nitrile group, nitro group and amino group; alkoxy group, acyl group and acyloxy group.
- R1 to R8 may be the same or different. Of these, R1—R4 are preferably hydrogen, and it is particularly preferred that R1—R8 are all hydrogen.
- the cyclic polynuclear metal complex when used as a gelling controlling agent, the cyclic polynuclear metal complex may be used in an amount of 0.8 mmol ZL per 1 L of the fluid compound, depending on the type of the liquid compound to be gelled. (about 1% by weight) or more. Since the cyclic polynuclear metal complex is excellent in gelling efficiency, sufficient gel-forming ability can be expected at the concentration of 0.8 mmol ZL. In addition, the upper limit is not particularly limited, but as long as it is 20 mmolZL or less, it can be suitably used as a gelling agent. The speed of gelling depends on the amount of the cyclic polynuclear metal complex added. Therefore, when the gelation is performed instantaneously by ultrasonic irradiation for about several seconds, it is generally preferable to add the above-mentioned cyclic polynuclear metal complex so that the concentration becomes 10 mmol ZL.
- the cyclic polynuclear metal complex having the above structure is irradiated with ultrasonic waves, the plane is stacked between the molecules due to ⁇ - ⁇ stacking between the two molecules. This and Then, the R-form and S-form of the cyclic polynuclear metal complex associate to form a dimer. When the dimer is formed, the R-form and the S-form of the cyclic polynuclear metal complex are alternately and continuously stacked on the dimer. In this way, when a linked body of a cyclic polynuclear metal complex in which R-forms and S-forms are alternately and regularly arranged in a heterochiral arrangement is formed, a fluid compound is incorporated into the linked body. As a result, the fluidity of the fluidized conjugate becomes significantly reduced, and the fluidity of the ligated product becomes gelled.
- the above ultrasonic irradiation is performed to generate a dimer, which is an active chemical species that triggers the initiation of the connection of the cyclic polynuclear metal complex. That is, if a sufficient amount of the dimer is formed, the stacking of the cyclic polynuclear metal complex on the dimer proceeds regardless of the irradiation of the ultrasonic wave. Therefore, the ultrasonic irradiation may be performed at an early stage of starting the gelling, which is not necessary to be performed during the gel formation of the fluid compound.
- the irradiation time of the ultrasonic wave depends on the frequency of the ultrasonic wave, the type of the fluid compound, and the desired gelation rate of the fluid compound, but is preferably 1 second or more. Gel formation can usually be advanced by irradiation for about 3 seconds. Furthermore, when performing gelling at a high gelation rate, it is sufficient to set the ultrasonic irradiation time relatively long, for example, 3 seconds or more, more specifically, 3 seconds to 15 seconds, 10 seconds. The irradiation time may be increased, such as 20 seconds. Thus, by controlling the irradiation time of the ultrasonic wave, the gelling speed of the fluid compound can be controlled.
- the frequency of the ultrasonic waves to be applied may be set according to the type of the fluid compound and the desired gelling speed of the fluid compound. Specifically, the frequency of the ultrasonic wave may be 20 kHz to 100 MHz or more. Of this range, the upper limit is particularly preferably 100 kHz or less, more preferably 45 kHz or less.
- the ultrasonic irradiation is generally performed using an apparatus in which an ultrasonic oscillator is attached to the bottom of a metal container. Specifically, water is poured into a metal container of the above-described apparatus, and a sample container containing a fluidity ligating substance to which a gelling agent is added is immersed in the water in the metal container, and the water is immersed. The vibration of the ultrasonic wave is transmitted to the gelling agent through the above. At this time, by immersing the sample solution in a position near the water surface where the ultrasonic waves are effectively applied, ultrasonic irradiation to the gelling control agent can be performed more effectively.
- the ultrasonic irradiation is performed using water as a medium.
- the ultrasonic irradiation may be performed through a medium other than water, or the flowable compound to which the gelling control agent is added may be used.
- the ultrasonic irradiation may be performed by directly inputting an ultrasonic oscillator.
- the linked body in which the heterochiral arrangement is stacked with the cyclic polynuclear metal complex by irradiating ultrasonic waves is heated again to a state where the cyclic polynuclear metal complex is not interconnected again, that is, the cyclic polynuclear metal complex is heated. Dissociates into complexes. Thereby, the fluidity is remarkably reduced by being taken into the connected body, and the fluidity is returned to the liquid state before the irradiation with the ultrasonic wave, which has been in the gel state.
- the above-mentioned heating refers to a heating treatment performed to raise the temperature of the gelled flowable conjugate, and refers to heating to a temperature equal to or higher than the sol-gel phase transition temperature Tgel. Since the sol-gel phase transition temperature Tgel differs depending on the amount of the gelling control agent used and the type of the fluidity bonding material used, the heat treatment is performed so that the temperature of the fluid compound is higher than the sol-gel phase transition temperature Tgel.
- the heating can be performed so that the temperature of the fluid compound is usually 70 ° C to 100 ° C, and the gelled fluidized conjugate can be brought into a liquid state. .
- the heat treatment may be any heat treatment capable of injecting thermal energy into the fluidity conjugate, for example, heating with a hot water bath, heating with thermal power, or a heater or a heater such as a heater or a dryer. Heating, microwave heating, oil bath, or the like may be used.
- the heating time depends on the heating method and the heating temperature as long as the fluid compound can be changed into a gel state force and a liquid state, but it is usually 15 seconds to 1 minute.
- Heat treatment may be performed.
- the heating time is such that the higher the heating temperature, the shorter the time the fluid compound can be brought into the liquid state, and the longest heating time when heating to the sol-gel phase transition temperature Tgel. Required.
- the heat treatment when the heat treatment is performed while stirring the fluid compound in the gel state, the fluid compound can be returned to the liquid state by a shorter heat treatment. Further, the heating time may be shorter as the force S of the container in which the fluidity conjugate is put is smaller.
- the fluid compound that has returned to the liquid state by the above-described heat treatment does not undergo gelling even when cooled to room temperature.
- the reason for this is that the above-mentioned cyclic polynuclear metal complex is formed by ⁇ - ⁇ stacking by two planes containing metals Ml and M2 and an aromatic ring in the molecule. In other words, it has a stable structure.
- the conventional low-molecular gelling agent a molecular assembly is spontaneously formed using the van der Waals force, hydrogen bonding, and the like as a self-aggregating force, thereby gelling the fluidized compound. Therefore, even when the gelled liquor is heated to a liquid state under high-temperature conditions by heating, when cooled to room temperature, the low-molecular-weight gelling agent forms a molecular assembly, thereby causing a re-assembly. Return to gel state. That is, the conventional low-molecular gelling agent stabilizes by forming a molecular assembly under room temperature conditions, and thus freely controls the gelation and liquefaction of a fluid compound under room temperature conditions. I can't.
- the above-mentioned cyclic polynuclear metal complex can be stabilized by ⁇ - ⁇ stacking in the molecule, and can be stabilized by ⁇ - ⁇ stacking between the molecules. That is, the above-mentioned cyclic polynuclear metal complex is stable even at a room temperature, even if it is a monomer. Even if the cyclic polynuclear metal complex is a linked product having a heterochiral arrangement, it is stable. Therefore, when gelling a fluid compound using the above-mentioned cyclic polynuclear metal complex, it is necessary to inject energy for converting the cyclic polynuclear metal complex from a stable monomer to a stable conjugate. In the present invention, as described above, energy for forming a dimer of a cyclic polynuclear metal complex serving as a trigger for forming a linked body is supplied by ultrasonic treatment.
- the linked body when heat is applied to the above-mentioned linked body to supply energy, the linked body is dissociated into monomers.
- the cyclic polynuclear metal complex dissociated into the monomer is stabilized by the ⁇ - ⁇ stacking in the molecule as described above. Is not formed. That is, once the liquid state is changed by the above-mentioned heat treatment, the liquid state is not changed to a gel state even if the temperature is lowered thereafter.
- the gelling control agent of the present invention brings the fluidized conjugate into a gel state in a predetermined temperature range such as under room temperature conditions, which was not possible with a conventional gelling agent.
- a predetermined temperature range such as under room temperature conditions
- the flowable compound In both cases and when the flowable compound is in the liquid state, it has a stable structure, so by repeating ultrasonic irradiation and calo heat treatment, the gelation and liquefaction of the flowable compound are reversible.
- the above-mentioned "predetermined temperature range” refers to a temperature range in which the gelling is performed.
- the lower limit of the temperature range may be any temperature in the definition of gel, but can be set to a temperature higher than the freezing temperature of the solvent.
- the upper limit of the temperature range can be set to the maximum temperature at which the gel is maintained by the gelling agent of the present invention, that is, Tgel.
- the predetermined temperature range is preferably in the range of 5 ° C to 35 ° C.
- the gelling control agent of the present invention has a high response to ultrasonic irradiation and heat treatment, and thus can freely control the flowability of the flowable compound. it can. Therefore, utilizing the property of instantaneously changing a flowable compound from a liquid state to a gel state, it can be used to prevent the leakage of dangerous substances and the diffusion of volatile substances and aroma components in a solution. Can be. In addition, since the gel state force and the liquid state can be freely changed, by reversibly controlling the fluidity of the flowable compound, for example, the liquid substance gels when transported, and returns to the liquid state when used. , Easy transportation and carrying of liquid materials
- the cyclic polynuclear metal complex associates by ultrasonic irradiation, and the associated cyclic polynuclear metal complex is formed by heat treatment.
- the polynuclear metal complex dissociates and the fluidity of the fluid compound is reversibly controlled.
- the cyclic polynuclear metal complex does not change its structure as a simple substance.Thus, even when added to a fluid compound, it does not react with the fluid compound and does not change the properties of the fluid compound. ,.
- the gely ridge control agent of the present invention by performing the ultrasonic irradiation and the heat treatment as described above, changes the fluidity of the fluid ridge and the fluid ridge It also changes the elasticity of the fluid and the light transmittance (absorbance) of the fluidized conjugate. Specifically, when the fluid compound is gelled, the fluid compound exhibits elasticity and the light transmittance decreases. On the other hand, when the flowable conjugate changes from the gel state to the liquid state, the elasticity is lost and the light transmittance increases.
- the compound represented by the above general formula (1) forms a specific gel by heterochiral association. More specifically, when irradiated with ultrasonic waves, the cyclic polynuclear metal complex having the above structure is in a state where the planes are stacked between the molecules due to ⁇ - ⁇ stacking between the two molecules. At this time, the R-form and the S-form of the cyclic polynuclear metal complex associate to form a dimer. When the dimer is formed, the R-form and the S-form of the cyclic polynuclear metal complex are alternately and continuously stacked on the dimer.
- the compound represented by the above general formula (1) has a gel-forming ability only when it is in a chiral state containing an R-form and an S-form, and when the enantiomer has the same achiral state. Does not have gel forming ability. That is, the compound represented by the general formula (1) has a unique property that gel formation does not occur at all, regardless of the presence or absence of ultrasonic irradiation and the type of solvent, unless it is in a chiral state.
- the compound represented by the general formula (1) may be chiral, and the content ratio of the R-form and the S-form is not particularly limited.
- the racemic body included only in 50 can be used. R physical strength It does not work even when one of the S bodies is included in a larger amount.
- the gel formation by the compound represented by the general formula (1) is considered to proceed by extremely precise heterochiral association, as shown in FIG. 6, because the R-form and the S-form are alternately juxtaposed. Racemic is more preferred.
- the racemic form is also excellent in that the gelling speed and Z or gel strength are the highest. [0070]
- the gelling speed can be freely controlled by the sound pressure of ultrasonic waves.
- the sound pressure of the ultrasonic wave per unit area is calculated based on the voltage A (W) input to the ultrasonic vibrator, without being output as an ultrasonic wave from the ultrasonic vibrator. Difference of voltage B (W) to return: A—B (W) is divided by the area (cm 2 ) of the diaphragm (WZcm 2 ).
- the gelation rate includes (a) a long ultrasonic irradiation time, and (b) a unit area of the ultrasonic wave. The bigger the sound pressure is, the faster it is.
- UV-visible Gel formation was also confirmed by measuring the absorbance of the baseline at a wavelength of 700 nm at predetermined time intervals using a photometer (SHIMADZU MultiSpec-1500, manufactured by Shimadzu Corporation).
- the liquefaction was evaluated based on the visibility of the test solution in the test tube and the presence or absence of fluidity of the test solution in the test tube. The presence or absence of fluidity was judged based on the criteria described in the evaluation of gelation. If the test solution moved in the direction of gravity immediately after the test tube was turned over, it was determined that there was fluidity and the solution was subjected to liquid filtration. When the measured liquid did not move in the direction of gravity and stayed at least temporarily at the bottom of the test tube, it was determined that there was no fluidity and no liquid was drawn.
- the gelled solution was heated in an oil bath at 100 ° C for 15 seconds. After the heat treatment, the measurement solution was cooled to room temperature (20 ° C.), and evaluation of liquid measurement of the measurement solution was performed. As a result, it was confirmed that the measurement solution had returned from the gelled state to a completely transparent liquid state before ultrasonic irradiation.
- each measurement solution subjected to gelling was heated in an oil bath at 100 ° C for 30 seconds. After the heat treatment, each measurement solution was cooled to room temperature (20 ° C.), and liquefaction of each measurement solution was evaluated. As a result, it was confirmed that the measurement solution returned from the gelled state to the completely transparent liquid state before the ultrasonic irradiation.
- the measurement liquid obtained in Example 14 was left at room temperature without performing ultrasonic treatment and heat treatment.
- a measurement solution was prepared, and the measurement solution was irradiated with ultrasonic waves for 3 seconds.
- the time-dependent change in absorbance (Abs.) was measured at time intervals of 1 minute, and the correlation between the ultrasonic irradiation time and gel formation was measured.
- Figure 1 shows the results.
- the degree of light absorption is rapidly increased by ultrasonic irradiation, and instantaneous gelling occurs.
- the measurement liquid was irradiated with an ultrasonic wave for an irradiation time within a range of 0 second to 20 seconds, and the ultraviolet-visible spectrophotometer described in the evaluation of Geldani was used for 1 minute interval.
- the change with time of the absorbance (Abs.) was measured by using, and the correlation between the ultrasonic irradiation time and gel formation was examined. The results are shown in FIG. 2 and FIG.
- the measurement solution was irradiated with ultrasonic waves, and the change with time in absorbance (Abs.) was measured at time intervals of 3 minutes using the ultraviolet-visible spectrophotometer described in the above-mentioned evaluation of Gelyidani.
- the correlation between the sound wave irradiation time and gel formation was examined.
- Fig. 4 shows the results.
- Ml and M2 are Pd
- R1 to R8 are both H
- the relationship between tees was examined in detail.
- the solution (3.0% by weight) was charged, and ultrasonic waves were irradiated for 3 minutes in a water bath at a water temperature of 20 ° C. using an ultrasonic cleaner (W-221, 40 kHz, 0.45 W / cm 2 , manufactured by Nissan Electronics). Even after standing for a long time after ultrasonic irradiation, formation of a gel-pregel structure was not observed, and it was confirmed that the solution remained in the original transparent state.
- an ultrasonic cleaner W-221, 40 kHz, 0.45 W / cm 2 , manufactured by Nissan Electronics
- organic solvent benzene, toluene, 0-xylene, p-xylene, cyclohexene, ethyl acetate, acetone, 1,2-dimethoxyethane, carbon tetrachloride, and dimethyl sulfoxide were confirmed to maintain the above stable solution. .
- the gelling profile of the optically active anti-la was measured, and the change in the optical purity of the gel and the solution at the time of gel formation in a sample with a low and enantiomeric excess was examined.
- the diameter 12 mm, height 75 mm, the glass test tube having a thickness of 0. 8 mm, (-) placed 1.50 X 10- 2 M benzene solution of -ant preparative la (42% ee), ultrasonic Ultrasonic waves were irradiated for 10 seconds in a water bath at a water temperature of 20 ° C. with a washing machine (Honda Electronics, W-221, 40 kHz, 0.45 W / cm 2 ).
- the obtained pre-gel structure is separated from the solution by filtration, weighed, dried under reduced pressure, put into a foam at the outlet, and heated to return to the original stable solution. After removing benzene under reduced pressure, the solution is made into a form-form solution. Measure the specific rotation of the anti-la sample prepared from the gel and the remaining solution, and calibrate the linear rotation of the specific rotation and ee% linearly prepared in advance. From the line, 66% of the anti-la collected from each sample was determined. This operation is repeated until the end of the initial force of gel formation, thereby obtaining a profile of the change in optical activity in geli-dani shown in FIG. Created a file.
- the gel formation reaction rate at each ultrasonic irradiation sound pressure was measured. Specifically, hexanes 1. 25 X 10- 3 M cyclo anti-la (ee 0%) - d solution and an internal standard
- FIG. 9 shows the results of plotting apparent reaction rate constants calculated from the slopes of the straight lines by the least squares method in terms of sound pressure per unit area. As shown in Fig. 9, the obtained "apparent first-order reaction rate constant" is proportional to the sound pressure per unit area of the ultrasonic wave. Dependencies were shown.
- the gelation controlling agent according to the present invention changes a liquid compound in a liquid state to a gel state by ultrasonic irradiation, and heats the liquid compound in the gel state.
- the fluid compound is brought into a gel state or a liquid state by appropriately selecting the ultrasonic irradiation and the heat treatment.
- the geli-dani control agent is added to the flowable conjugate to easily enhance the flowability of the flowable compound by a simple method of ultrasonic irradiation and heat treatment. In addition, there is an effect that reversible control can be performed.
- a cyclic polynuclear metal complex having a structure represented by the general formula (1) when used as the gelling agent, the structure of the cyclic polynuclear metal complex is irreversible during gelation or liquefaction. Since there is no change, there is no adverse effect such as a change in the physical properties of the fluidity conjugate.
- the above-mentioned cyclic polynuclear metal complex it is not necessary to add a substance other than the gelich control agent during gelation or liquefaction, so that the fluidity of the fluid compound can be easily controlled. To play.
- the gelling control agent of the present invention instantaneously responds to ultrasonic irradiation, It shows excellent gel-forming ability even with a small amount added to the hydrophilic compound. Further, the fluidity can be restored by the heat treatment.
- the use of the above-mentioned Gelich control agent makes it possible to freely control the flowability of the flowable mixture, thereby instantaneously avoiding leakage of dangerous substances, and eliminating volatile substances in the solution.
- the divergence can be controlled instantaneously. It can also be used to create portable combustibles that can convert liquid combustibles to portable form and return them to liquid form when used, to safely transport combustibles, and to suppress the emission of aroma components. can do.
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