JP2003313189A - Optically active isosorbide derivative and method for producing the same, photoreactive chiral agent, liquid crystal composition, liquid crystal color filter, optical film and recording medium, method for changing spiral structure of liquid crystal and method for fixing spiral structure of liquid crystal - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain an optically active compound (optically reactive chiral agent) having photosensitivity and capable of largely changing spiral pitch (distortion force) of a liquid crystal. <P>SOLUTION: The optically active compound is an optically active isosorbide expressed by formula (I) [wherein A<SP>1</SP>and A<SP>2</SP>express each independently an aryl; B<SP>1</SP>and B<SP>2</SP>express each independently H or an alkyl; A<SP>1</SP>and B<SP>1</SP>or A<SP>2</SP>and B<SP>2</SP>can bond to each other to form a 5-membered or 6-membered ring; R<SP>1</SP>and R<SP>2</SP>express each independently H or an alkyl; L<SP>1</SP>and L<SP>2</SP>express each independently a halogen, an alkyl or an alkoxy; (m) and (n) express each independently 0-4 integer, when m ≥2 integer, L<SP>1</SP>may be the same group or different group, and when n ≥2 integer, L<SP>2</SP>may be the same group or different group]. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to an optically active isosorbide derivative having photosensitivity, a method for producing the same, a photoreactive chiral agent which causes a change in liquid crystal structure, a liquid crystal composition containing the same, a liquid crystal color filter, an optical film. And a recording medium, and a method for changing or fixing the helical structure of liquid crystal.

[0002]

2. Description of the Related Art In recent years, liquid crystal materials have attracted attention. For example, cholesteric liquid crystal compounds having a helical structure and exhibiting various selective reflection colors due to the twisting force (twist angle) of the helix have a selective reflectivity or a selective reflectivity. It is widely used for optical films, liquid crystal color filters, recording media, etc. because of its excellent color purity of reflected light.

As a concrete example, a color filter is taken as an example and the present situation is described below. For example, a color filter used in a color liquid crystal display or the like generally includes red (R), green (G), and blue (B) pixels,
A black matrix for the purpose of improving the display contrast is formed in the gap. Conventionally, such a color filter is generally one in which a pigment is dispersed in a resin or one in which a dye is dyed, and its manufacturing method is also such that a colored resin liquid is applied onto a glass substrate by spin coating or the like. A general method is to form a colored resist layer by using the above method and perform patterning by a photolithography method to form a color filter pixel, or to print the colored pixel directly on the substrate.

However, for example, the manufacturing method by the printing method has a drawback that the resolution of pixels is low and it is difficult to cope with the formation of a high-definition image pattern, and the manufacturing method by the spin coating method causes a large material loss and a large amount. There is a drawback that the coating unevenness is large when coating on a substrate having a large area. Further, according to the manufacturing method by the electrodeposition method, a color filter having a relatively high resolution and less unevenness of the colored layer can be obtained, but on the other hand, it has a drawback that the manufacturing process is complicated and liquid management is difficult. From the above, as a manufacturing process of a color filter, there has been a demand for a manufacturing method capable of manufacturing a high-quality color filter with little material loss, highly efficiently and easily.

On the other hand, as the performance of the color filter,
It is required to have high transmittance and high color purity, and in recent years, the method using dyes has improved the above-mentioned requirements by optimizing the type of dye and dyeing resin, and the method using pigments, using finer dispersed pigments. Has been planned. However, in recent liquid crystal display (LCD) panels, the requirements for the transmittance and color purity of color filters are extremely high, and in particular, in the color filters for reflective LCD, white display of paper white, contrast, and color reproducibility are compatible. On the other hand, the color filters produced by dyeing a dye in a resin or dispersing a pigment in a conventional production method are all light-absorption type color filters, so that the transmittance is further improved. The improvement of the color purity by the method has reached the limit.

In view of the above situation, a polarization-use type color filter containing a cholesteric liquid crystal as a main component has recently attracted attention. This polarization-use type color filter reflects a certain amount of light and transmits the other light to display an image. Therefore, the utilization efficiency of light is originally high, and the transmittance and color purity are higher than those of the light-absorption type color filter. It has outstanding performance. On the other hand, as the manufacturing method, a method of forming a film on a substrate by using a spin coating method or the like has been generally performed from the viewpoint of obtaining a uniform thickness, but there is a problem that a material loss is large and cost is high. It was a disadvantage.

A photoreactive chiral compound (chiral compound) is a means for solving the above problems, ensuring the uniformity of color purity of the color filter film, and reducing the number of manufacturing steps. The method using is effective. In this method, when a liquid crystal composition containing a photoreactive chiral compound is irradiated with light having a reaction wavelength of the chiral compound in a pattern, the reaction of the chiral compound proceeds in accordance with the intensity of the irradiation energy, and Since the spiral pitch (helix twist angle) changes, the principle is used that a selective reflection color is formed for each pixel only by pattern exposure with a light amount difference. That is, there is an advantage that the number of times of patterning at the time of forming the color filter can be completed by one-time mask exposure using masks having different amounts of transmitted light. Therefore, after patterning by irradiating light like an image,
By immobilizing the patterned cholesteric liquid crystal compound, a film functioning as a color filter can be formed. This technique can also be applied to optical films and image recording.

In particular, when a color filter is manufactured by exposing the mask once, B (blue), G (green),
It is desired that the three primary colors of R (red) can be formed with good color purity by a single exposure. However, when the rate of change in the liquid crystal twist is small, sufficient color purity cannot be obtained. Therefore, from the viewpoint of displaying the three primary colors having high color purity with one exposure, practically, as the photoreactive chiral compound to be used, the twisting change rate that can significantly change the twisting force of the helical structure of the liquid crystal compound, It is necessary to use a chiral compound (chiral agent) having a large value. That is, by using a chiral compound having a large twist change rate, it is possible to widen the range of hues that are selectively reflected by the change in the light amount.

As such a chiral agent, the applicant of the present invention previously applied for a photoreactive chiral agent having an isosorbide skeleton esterified with a cinnamic acid derivative (Japanese Patent Application No.
1-5740, Japanese Patent Application 2000-382515, Japanese Patent Application 20
00-382516, Japanese Patent Application No. 2001-146120). Further, WO00 / 34808 discloses a benzylidene menthon type photoreactive chiral agent. On the other hand, the light source used for mask exposure is generally 36
It is an ultra-high pressure mercury lamp having a bright line at 5 nm, and it is desirable that the chiral agent has a large molar absorption coefficient in this wavelength region with high sensitivity during mask exposure, that is, in order to accelerate the reaction of the chiral compound. However, the above-mentioned chiral agents have a problem that the molar absorption coefficient at 365 nm is small, the sensitivity is low at the time of mask exposure, or the cis isomer after photoisomerization lacks thermal stability. Further, from the viewpoint of synthesizing the chiral agent, it has been desired that the compound can be easily synthesized without using a transition metal catalyst such as a palladium catalyst.

[0010]

As described above, the liquid crystal is provided with photoreactivity capable of changing the alignment structure such as the helical pitch (twisting force, twisting angle of the helix) of the liquid crystal depending on the amount of light irradiated, and for example, nematic liquid crystal. In the case of a cholesteric liquid crystal phase containing a compound, the wavelength range in which selective reflection is possible is wide and various selective reflections are exhibited, and in particular, the three primary colors (B, G, R) can be displayed with high color purity. The present situation is that a photoreactive chiral agent capable of greatly changing the pitch (twisting force) has not been provided yet.

An object of the present invention is to solve the above-mentioned conventional problems and achieve the following objects. That is, the present invention firstly provides a novel optically active compound having photosensitivity, capable of being isomerized by light to change its structure, and having excellent thermal stability of a cis isomer after photoisomerization. With the goal. Second, the orientation of the liquid crystal compound can be controlled, and the rate of change in the helical pitch (twisting force) of the liquid crystal due to light (hereinafter, also referred to as “twist change rate”) is large, for example, in the cholesteric liquid crystal phase. In this case, it is an object of the present invention to provide a photoreactive chiral agent capable of displaying a wide range of selective reflection including the three primary colors (B, G, R) and capable of displaying the three primary colors with high color purity. Thirdly, it contains a photo-reactive chiral agent that can change the helical pitch (twisting force) of the liquid crystal by light and has a large rate of twist change. In the case of a cholesteric liquid crystal capable of changing the color, there is provided a liquid crystal composition which exhibits a wide range of selectively reflected colors including the three primary colors when irradiated with light and is capable of displaying the three primary colors with excellent color purity. The purpose is to

Fourthly, the present invention relates to a spiral of liquid crystal capable of significantly changing the spiral pitch (twisting force) of the liquid crystal by irradiating a liquid crystal composition containing a photoreactive chiral agent having a large twist change rate with light. It is intended to provide a method of changing the structure. Fifth, a liquid crystal composition containing a photoreactive chiral agent having a large twist change rate can be fixed in a state of being maintained without damaging a patterned spiral pitch after imagewise exposure. When is a cholesteric liquid crystal phase, by fixing the helical structure of the liquid crystal to a desired selective reflection color, it is possible to obtain a hue of high color purity, the object is to provide a method of fixing the helical structure of the liquid crystal. To do.

A sixth object of the present invention is to provide a liquid crystal color filter having a high color purity, which contains a photoreactive chiral agent capable of largely changing the helical pitch (twisting force) of liquid crystal by light irradiation. To do. Seventh, in the case of a non-light-absorption type optical film containing a photoreactive chiral agent capable of largely changing the twisting power of liquid crystal by light irradiation, for example, in the case of a cholesteric liquid crystal phase, the selective reflection region is wide and the color purity is high. It is intended to provide an optical film. Eighth, a recording medium containing a photoreactive chiral agent capable of largely changing the twisting power of liquid crystal by light irradiation and capable of forming a clear image by changing the light amount like an image, for example, a liquid crystal phase is a cholesteric liquid crystal phase. In this case, it is an object of the present invention to provide a recording medium capable of forming an image composed of a selective reflection color having a wide hue and a high color purity.

[0014]

The means of the present invention for solving the above-mentioned problems are as follows. <1> An optically active isosorbide derivative represented by the following general formula (I).

[Chemical 2] [In the general formula (I), A ¹ and A ² each independently represent an aryl group, and B ¹ and B ² each independently represent a hydrogen atom or an alkyl group. Further, A ¹ and B ¹ or A ² and B ² represent a group capable of binding to each other to form a 5-membered ring or a 6-membered ring. R ¹ and R ² each independently represent a hydrogen atom or an alkyl group. L ¹
And L ² each independently represent a halogen atom, an alkyl group or an alkoxy group. m and n each independently represent an integer of 0 to 4, when m represents an integer of 2 or more, L ¹ may be the same group or different groups, and when n represents an integer of 2 or more, L ² May be the same group or different groups. <2> A photoreactive chiral agent comprising the optically active isosorbide derivative described in <1> above. <3> A liquid crystal composition containing at least a liquid crystal compound and at least one of the optically active isosorbide derivatives described in <1>. <4> A liquid crystal composition comprising a liquid crystal compound having at least one polymerizable group, at least one kind of the optically active isosorbide derivative described in <1>, and a photopolymerization initiator. <5> The liquid crystal composition according to <4>, wherein the optically active isosorbide derivative according to <1> and the photopolymerization initiator have different photosensitive wavelength regions. <6> A helical structure of liquid crystal in which the liquid crystal composition according to any one of <3> to <5> is irradiated with light to change the structure of the optically active isosorbide derivative represented by the general formula (I). How to change. <7> After the liquid crystal composition according to any one of <3> to <5> above is imagewise irradiated with light in the photosensitive wavelength region of the optically active isosorbide derivative represented by the general formula (I). ,
A method for fixing a helical structure of liquid crystal, which comprises a step of performing photopolymerization by irradiating light in a photosensitive wavelength region of a photopolymerization initiator. <8> A liquid crystal color filter containing at least a liquid crystal compound and at least one kind of the optically active isosorbide derivative described in <1>. <9> An optical film containing at least a liquid crystal compound and at least one of the optically active isosorbide derivatives described in <1>. <10> A recording medium containing at least a liquid crystalline compound and at least one of the optically active isosorbide derivatives described in <1>.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION (Optically active isosorbide derivative)
First, the optically active isosorbide derivative of the present invention will be described in detail. The optically active isosorbide derivative of the present invention is an optically active compound represented by the following general formula (I), which itself undergoes cis-trans isomerization by light and undergoes a structural change, particularly in the wavelength region near 365 nm. It has photosensitivity.

[0016]

[Chemical 3]

In the above formula (I), A ¹ and A ² each independently represent an aryl group, and B ¹ and B ² each independently represent a hydrogen atom or an alkyl group. Also, A ¹ and B ¹ or A ² and B ²
May combine with each other to form a 5- or 6-membered ring.
R ¹ and R ² each independently represent a hydrogen atom or an alkyl group. L ¹ and L ² each independently represent a halogen atom, an alkyl group or an alkoxy group. m and n are independently 0 to
When m represents an integer of 2 or more, L ¹ may be the same group or different groups, and when n represents an integer of 2 or more, L ² may be the same group or different groups. Good.

The compound represented by the above general formula (I) will be described. The aryl group represented by A ¹ and A ² includes
It may have a substituent and preferably has a total carbon number of 6 to 40, particularly preferably 6 to 30. Examples of the substituent include a halogen atom, an alkyl group, an alkenyl group, an alkynyl group, an alkoxy group, a hydroxyl group, an acyl group, an alkoxycarbonyl group, an aryloxycarbonyl group, an acyloxy group, an acylamino group, a carboxyl group, a cyano group, A heterocyclic group is preferable, and a halogen atom, an alkyl group, an alkenyl group, an alkoxy group, a hydroxyl group, an acyloxy group, an acylamino group, an alkoxycarbonyl group, and an aryloxycarbonyl group are particularly preferable.

Among the above aryl groups, the aryl group represented by the following general formula (II) or general formula (III) is preferable.

[Chemical 4]

In the above formula (II) or (III), R ³ and R ⁴ are
Independently hydrogen atom, halogen atom, alkyl group,
Alkenyl group, alkynyl group, aryl group, heterocyclic group,
It represents an alkoxy group, a hydroxyl group, an acyl group, an alkoxycarbonyl group, an aryloxycarbonyl group, an acyloxy group, an acylamino group, a carboxyl group, and a cyano group. Among these, a hydrogen atom, a halogen atom, an alkyl group, an alkenyl group, an aryl group, an alkoxy group, a hydroxyl group, an alkoxycarbonyl group, an aryloxycarbonyl group, an acyloxy group and an acylamino group are preferable, and an alkoxy group, a hydroxyl group and an acyloxy group are particularly preferable. Groups are preferred.

In the above formula (II) or (III), L ³ and L ⁴ each independently represent a halogen atom, an alkyl group or an alkoxy group, and an alkoxy group having 1 to 10 carbon atoms is particularly preferable. p represents an integer of 0 to 4, and 0 or 1 is particularly preferable. q represents an integer of 0 to 6, and 0 or 1 is particularly preferable. When p and q are integers of 2 or more, L ³ and L ⁴ may represent the same group or different groups.

Examples of the above aryl group include an aryl group represented by the following formula.

[Chemical 5]

Among the aryl groups represented by A ¹ and A ² , the aryl groups represented by the following formulas are particularly preferable.

[Chemical 6] Further, it is particularly preferable that A ¹ and A ² represent the same group.

As the alkyl group represented by B ¹ and B ² ,
It may be unsubstituted or substituted with a substituent, and the total carbon number is 1
The alkyl group having 20 to 20 carbon atoms is preferable, and the alkyl group having 1 to 8 carbon atoms is particularly preferable. As the substituent, for example, a halogen atom or an alkoxy group is preferable. Specific examples of the alkyl group include a methyl group, a butyl group, a trifluoromethyl group, a methoxyethyl group and the like.

Of these groups represented by B ¹ and B ² , a hydrogen atom and an unsubstituted alkyl group are preferable, and a hydrogen atom is particularly preferable. Further, it is preferable that B ¹ and B ² represent the same group.

A ¹ and B ¹ or A ² and B ² are bonded to each other to form 5
When forming a 6-membered ring, a ring containing a carbon atom, an oxygen atom or a nitrogen atom is preferable, and a ring containing a carbon atom or an oxygen atom is particularly preferable. Further, the above ring may be condensed with another ring.

The hydrogen atom on the above-mentioned 5-membered ring or 6-membered ring or the ring condensed therewith may be substituted by a substituent, and such a substituent may be a halogen atom or an alkyl group. Group, an alkenyl group, an alkynyl group, an aryl group, an alkoxy group, an acylalkoxycarbonyl group, an aryloxycarbonyl group, an acyloxy group, an acylaminocyano group, and the like. Among them, an alkyl group, an aryl group, an alkoxy group, an acylamino group are particularly preferable. Is preferred.

Examples of such a 5-membered ring or 6-membered ring include those shown below.

[Chemical 7] In the above formula, * represents a preferable substitution position of the substituent.

Of these 5-membered rings or 6-membered rings, those shown below are particularly preferable.

[Chemical 8] In the above formula, * represents a preferable substitution position of the substituent.

When the 5-membered ring or 6-membered ring formed by bonding A ¹ and B ¹ to each other and the 5-membered ring or 6-membered ring formed by bonding A ² and B ² to each other are the same Is particularly preferable. Above, among these A ¹ and B ¹ or A ² and B ² , especially A ¹ and B ¹
Most preferably, A ² and B ² form a ring.

The alkyl group represented by R ¹ and R ² is
It may be unsubstituted or substituted with a substituent, and the total carbon number is 1
The alkyl group having 20 to 20 carbon atoms is preferable, and the alkyl group having 1 to 8 carbon atoms is particularly preferable. A halogen atom and an alkoxy group are preferred as examples of the substituent. Specific examples of the alkyl group include a methyl group, a butyl group, a trifluoromethyl group, a methoxyethyl group and the like. As described above, the group represented by R ¹ and R ² is preferably a hydrogen atom or an unsubstituted alkyl group, and particularly preferably a hydrogen atom. Also, R
^It is particularly preferable that ¹ and R ² represent the same group.

As the halogen atom represented by L ¹ and L ² , a fluorine atom and a chlorine atom are preferable, and a fluorine atom is particularly preferable.

As the alkyl group represented by L ¹ and L ² ,
It may be unsubstituted or substituted with a substituent, and the total carbon number is 1
The alkyl group having 20 to 20 carbon atoms is preferable, and the alkyl group having 1 to 8 carbon atoms is particularly preferable. A halogen atom and an alkoxy group are preferred as examples of the substituent. Specific examples of the above alkyl group include a methyl group, a butyl group, a trifluoromethyl group, a methoxyethyl group and the like.

The alkoxy group represented by L ¹ and L ² may be unsubstituted or may be substituted with a substituent, and an alkoxy group having a total carbon number of 1 to 20 is preferable, and an alkoxy group having a total carbon number of 1 is particularly preferable.
Alkoxy groups of -8 are preferred. A halogen atom is preferable as an example of the substituent. Specific examples of the above alkoxy group include a methoxy group and a trifluoromethoxy group.

As mentioned above, the groups represented by L ¹ and L ² are preferably an alkyl group and an alkoxy group, and particularly preferably an alkoxy group.

M and n are integers from 0 to 4, but 0, 1,
2 is preferable, and 0 is particularly preferable.

Of the compounds represented by the general formula (I), those represented by the following general formula (IV) or general formula (V) are preferable.

[Chemical 9] In particular, those represented by the above general formula (V) are preferable.

The optically active isosorbide derivative represented by the general formula (I) of the present invention has a double bond between carbon atoms to which R ¹ and B ¹ and R ² and B ² are bonded. Geometrical isomers (cis and trans isomers) exist due to the difference in the arrangement. The optically active isosorbide derivative of the present invention includes cis isomers, trans isomers, and mixtures thereof. However, from the viewpoint of large change rate of twisting power and ease of synthesis, cis isomers are obtained by irradiation with light in trans isomers. It is preferable that the structure changes to.

Specific examples of the optically active isosorbide derivative represented by the above general formula (I) (exemplified compounds 1-1 to 1-1) are shown below.
46, 2-1-9, 3-1-6, 4-1-4).
However, the present invention is not limited thereto and includes cis isomers which are geometric isomers.

[0040]

[Chemical 10]

[0041]

[Chemical 11]

[0042]

[Chemical 12]

[0043]

[Chemical 13]

[0044]

[Chemical 14]

[0045]

[Chemical 15]

[0046]

[Chemical 16]

[0047]

[Chemical 17]

[0048]

[Chemical 18]

[0049]

[Chemical 19]

(Synthesis of Isosorbide Derivative) Next, the method for synthesizing the optically active isosorbide derivative represented by the general formula (I) of the present invention will be described in detail. The synthesis of the isosorbide derivative represented by the general formula (I) is carried out according to (1)
Method of esterifying isosorbide and corresponding carboxylic acid chloride under basic conditions, (2) Method of condensing isosorbide and corresponding carboxylic acid using a dehydrating agent such as DCC, (3) Isosorbide and corresponding carboxylic acid Can be carried out by the Mitsunobu reaction or the like. The corresponding carboxylic acid chloride can be obtained by reacting a carboxylic acid with oxalyl chloride, thionyl chloride or the like. The corresponding carboxylic acid can be obtained by, for example, a method in which the corresponding ketone is hydrolyzed after an aldol-type condensation reaction between a formylbenzoic acid derivative and the like.

It can also be synthesized by the following reaction formula.

[0052]

[Chemical 20]

That is, the isosorbide derivative represented by the general formula (I) can be obtained by a dehydration condensation reaction between the compound (A) and the compound (B) and the compound (C).

The above condensation reaction can be carried out under any of basic conditions, acidic conditions and neutral conditions, but it is particularly preferred to carry out under acidic conditions. The reaction under the acidic condition is described in J. Chem. Soc. Perkin. Tr
Ans I, 1554 (1972) can be referred to.

Further, in the above, each of the compound (A) and the compound (B) is 1.0 to 1.0% with respect to the compound (C).
It is preferable to use 5.0 molar equivalents, especially 1.0 to
It is preferred to use 2.0 molar equivalents.

As the above-mentioned acidic conditions, acidic substances such as p-toluenesulfonic acid monohydrate, sulfuric acid, hydrochloric acid and metasulfonic acid can be used. As the solvent for the above reaction, a solvent such as toluene, acetonitrile or methanol can be used, and toluene is particularly preferable.

(Photoreactive Chiral Agent) The photoreactive chiral agent of the present invention comprises the above-mentioned optically active isosorbide derivative, can control the alignment structure of the liquid crystalline compound, and isomerizes the liquid crystal by irradiation of light. Spiral pitch, that is, the twisting force of the spiral structure HTP (helical twisting power)
It has a characteristic that can change. That is, it is a compound that causes a change in the twisting force of a helical structure induced in a liquid crystal compound, preferably a nematic liquid crystal compound, by light irradiation (ultraviolet light to visible light to infrared light), and as a necessary site (molecular structure unit), a chiral Part (chiral part)
And a site that undergoes a structural change upon irradiation with light.

In addition, the photoreactive chiral agent composed of the isosorbide derivative can significantly change the HTP of liquid crystal molecules. Therefore, for example, in the case of a cholesteric liquid crystal (liquid crystal phase) using a nematic liquid crystal compound as a liquid crystal compound, B (blue), G (green), R (red)
It becomes possible to perform selective reflection over a wide wavelength range including the three primary colors. That is, the selective reflection characteristic of the wavelength of light is determined by the twist angle of the helical structure of the liquid crystal molecules, and the wider the angle, the wider the color range of selective reflection, which is useful.

When the photoreactive chiral agent composed of the isosorbide derivative has a structure in which one or more polymerizable bonding groups are introduced in the same molecule, a liquid crystal containing the photoreactive chiral agent is formed. The heat resistance of the composition and, for example, liquid crystal color filters and optical films can be improved.

The photoreactive chiral agent consisting of the isosorbide derivative preferably has a molecular weight of 500 or more. Further, those having a high solubility with the liquid crystal compound described later are preferable, and those having a solubility parameter (SP) value close to that of the liquid crystal compound are more preferable.

The HTP represents the twisting force of the helical structure of the liquid crystal, that is, HTP = 1 / (pitch × concentration of chiral agent [mass fraction]). For example, the helical pitch of liquid crystal molecules at a certain temperature ( One cycle of the helical structure: μm) is measured, and this value can be calculated by converting it from the concentration of the chiral agent [μm ⁻¹ ]. When a selective reflection color is formed by the illuminance of light by the photoreactive chiral agent, the rate of change of the HTP (= H before irradiation)
As (TP / HTP after irradiation), 1.5 or more is preferable when HTP becomes smaller after irradiation, and 2.
It is more preferably 5 or more, and if the HTP becomes larger after irradiation, 0.7 or less is preferable, and 0.4 or less is more preferable.

The photoreactive chiral agent of the present invention can also be used in combination with a known non-photoreactive chiral agent such as a chiral compound having a large temperature dependence of the twisting power. Examples of known chiral agents having no photoreactivity include, for example, JP-A-20
00-44451, Tokuyohei 10-509726, W
O98 / 00428, Tokuyo 2000-506873,
Tokuyohei 9-506088, "Liquid Crys
tals ”(<21>, 327, 1996),“ Liqu
id Crystals "(<24>, 219, 199
8) and the like.

(Liquid Crystal Composition) The liquid crystal composition of the present invention comprises at least one liquid crystalline compound (preferably a nematic liquid crystal compound) and the optically active isosorbide derivative of the present invention (that is, a photoreactive chiral agent). And at least one selected from the above, and the liquid crystal compound may or may not have a polymerizable group. If necessary, a polymerizable monomer, a polymerization initiator, a binder resin,
Solvent, surfactant, polymerization inhibitor, thickener, dye, pigment,
It may contain other components such as an ultraviolet absorber and a gelling agent. The liquid crystal composition of the present invention is preferably used in combination with a surfactant. For example, when applying a liquid crystal composition in a coating liquid to form a layer, the alignment state of liquid crystal molecules at the air interface of the layer surface can be three-dimensionally controlled, and particularly in the case of a cholesteric liquid crystal phase, a higher color purity can be obtained. A high selective reflection wavelength can be obtained.

(Optically Active Isosorbide Derivative) The optically active isosorbide derivative contains the optically active isosorbide derivative represented by the above-mentioned general formula (I) as a photoreactive chiral agent and has a three-dimensional structure of liquid crystal molecules. By controlling the light intensity of the liquid crystal compound, the helical structure of the coexisting liquid crystal compound, preferably the nematic liquid crystal compound, is changed by irradiating with a desired pattern and light amount. The content of the optically active isosorbide derivative (photoreactive chiral agent) is not particularly limited and may be appropriately selected, but is preferably about 0.1 to 30% by mass of the total solid content (mass) of the liquid crystal composition.

(Liquid Crystal Compound) As the liquid crystal compound,
The liquid crystal compound having a refractive index anisotropy Δn of 0.10 to 0.40 can be appropriately selected from liquid crystal compounds, polymer liquid crystal compounds, and polymerizable liquid crystal compounds. For example, a smectic liquid crystal compound, a nematic liquid crystal compound, etc. can be mentioned, and among them, a nematic liquid crystal compound is preferable. For example, a nematic liquid crystal compound is used as the liquid crystal compound, and the optically active isosorbide derivative represented by the general formula (I) is used in combination with the liquid crystal compound to obtain a cholesteric liquid crystal composition (cholesteric liquid crystal phase). The liquid crystalline compound can be aligned while it is in a liquid crystal state when melted, for example, by using an alignment substrate that has been subjected to an alignment treatment such as a rubbing treatment. Further, when the liquid crystal state is fixed in a solid phase and immobilized, a means such as cooling or polymerization can be used.

Specific examples of the liquid crystal compound include WO
95/22586, Japanese Patent Application 2000-51089, Japanese Patent Application 2
The compounds described in 000-68479 and Japanese Patent Application No. 11-91162 can be mentioned. However, the present invention is not limited to these. An example of such a liquid crystal compound is shown below.

[0067]

[Chemical 21]

[0068]

[Chemical formula 22]

[0069]

[Chemical formula 23]

In the above formula, n represents an integer of 1 to 1000.
In each of the above-exemplified compounds, those in which the linking group of the aromatic ring is changed to the following structure can also be mentioned as suitable examples.

[0071]

[Chemical formula 24]

Among the above, a liquid crystalline compound having a polymerizable group or a crosslinkable group in the molecule is preferable from the viewpoint of ensuring sufficient curability and improving the heat resistance of the layer.

The content of the liquid crystal compound is preferably 30 to 99.9% by mass and more preferably 50 to 95% by mass based on the total solid content (mass) of the liquid crystal composition. The content is 30
If it is less than mass%, the orientation may be insufficient,
Especially in the case of cholesteric liquid crystal, a desired selective reflection color may not be obtained.

(Photopolymerization Initiator) The liquid crystal composition of the present invention may contain a photopolymerization initiator. The photopolymerization initiator is used in combination to promote the polymerization reaction of the polymerizable group, and the liquid crystal composition is irradiated by light irradiation. The strength of the fixed liquid crystal composition can be further improved by fixing the spiral structure after changing the spiral pitch (twisting force). When the polymerization reaction of a polymerizable liquid crystal compound is used to fix the helical structure of the liquid crystal, it is preferable to add a photopolymerization initiator. For example, when the liquid crystal phase is a cholesteric liquid crystal phase, a desired spiral pitch can be stably obtained, and a selective reflection color with high color purity can be secured.

The photopolymerization initiator can be appropriately selected from known ones, for example, p-methoxyphenyl-2,4-bis (trichloromethyl) -s-triazine and 2- (p-butoxy). (Styryl) -5-trichloromethyl-1,3,4-oxadiazole, 9-phenylacridine, 9,10-dimethylbenzphenazine, benzophenone / Michler's ketone, hexaarylbiimidazole / mercaptobenzimidazole, benzyldimethylketal, thioxanthone / Amine, triarylsulfonium hexafluorophosphate, etc., and further bis (2,4,6-trimethylbenzoyl)-
Phenylphosphine oxide, etc. JP-A-10-2999
No. 7, bisacylphosphine oxides, L
Examples thereof include acylphosphine oxides described in DE 4230555 such as ucirin TPO.

The amount of the photopolymerization initiator added is preferably 0.1 to 20% by mass, more preferably 0.5 to 5% by mass, based on the total solid content (mass) of the liquid crystal composition. If the added amount is less than 0.1% by mass, the curing efficiency at the time of light irradiation is low and it may take a long time. If the added amount exceeds 20% by mass, the light transmittance in the ultraviolet region to the visible light region is increased. It may be inferior.

As described above, the liquid crystal composition of the present invention contains both the optically active isosorbide derivative represented by the general formula (I) and a photopolymerization initiator, and the optically active isosorbide derivative is exposed to light. Isomerization (trans-cis) is capable of changing the helical pitch of the liquid crystal, and the photopolymerization initiator is capable of promoting the polymerization reaction of the polymerizable group by light. It is preferable that the polymerization initiator and the light source wavelength have different photosensitive wavelength regions. Here, having different photosensitive wavelengths means that the photosensitive central wavelengths of both do not overlap,
It means that the liquid crystal orientations are not mutually changed at the time of imagewise exposure or at the time of polymerization and curing to the extent that the display characteristics of the image and the hue purity due to selective reflection do not decrease. In order to prevent the central wavelengths of photosensitivity from overlapping, it is possible to control the wavelength of the irradiation light through a bandpass filter or the like, in addition to the molecular structure of the both.

By exposing (sensitizing) light having wavelengths different from each other, the liquid crystal molecules are irradiated in an imagewise manner to align the liquid crystal molecules in a pattern, and then the spiral pitch of the liquid crystal aligned in the pattern is influenced. An image having a desired spiral pitch can be obtained by fixing the image without applying it. For example, when the liquid crystal phase is a cholesteric liquid crystal phase, it is possible to obtain a hue having excellent color purity by exhibiting a selective reflection color having a desired spiral pitch.

(Polymerizable Monomer) The liquid crystal composition of the present invention may be used for the purpose of improving the degree of curing such as film strength.
You may use a polymerizable monomer together. When the polymerizable monomer is used in combination, the helical structure (selective reflectivity) is fixed and fixed after changing (patterning) the twisting force of the liquid crystal due to light irradiation (for example, after forming the distribution of the selective reflection wavelength). The strength of the liquid crystal composition after conversion can be further improved. However, when the liquid crystal compound has a polymerizable group in the same molecule, it is not always necessary to add it.

Examples of the polymerizable monomer include monomers having an ethylenically unsaturated bond, and specific examples include polyfunctional monomers such as pentaerythritol tetraacrylate and dipentaerythritol hexaacrylate. Specific examples of the monomer having an ethylenically unsaturated bond include the compounds shown below, but the present invention is not limited thereto.

[0081]

[Chemical 25]

The amount of the polymerizable monomer added is preferably 0.5 to 50% by mass based on the total solid content (mass) of the liquid crystal composition. If the amount added is less than 0.5% by mass, sufficient curability may not be obtained, and
If it exceeds 0% by mass, the alignment of liquid crystal molecules may be hindered and sufficient color development may not be obtained.

(Other Components) As other components, a binder resin, a solvent, a surfactant, a polymerization inhibitor, a thickener, a dye, a pigment, an ultraviolet absorber, a gelling agent and the like can be added. Examples of the binder resin include polystyrene, polystyrene compounds such as poly-α-methylstyrene, cellulose resins such as methyl cellulose, ethyl cellulose, and acetyl cellulose, acidic cellulose derivatives having a carboxyl group in a side chain, polyvinyl formal, polyvinyl butyral, and the like. Acetal resin described in JP-A-59-44615, JP-B-54-34327, JP-B-58-12577, JP-B-54-25957, JP-A-59-53836, and JP-A-59-71048. Methacrylic acid copolymers, acrylic acid copolymers, itaconic acid copolymers, crotonic acid copolymers, maleic acid copolymers, partially esterified maleic acid copolymers and the like.

Further, homopolymers of alkyl acrylates and homopolymers of methacrylic acid alkyls are also mentioned, in which the alkyl group is methyl group, ethyl group, n-propyl group, n-butyl group, i.
so-butyl group, n-hexyl group, cyclohexyl group,
Examples thereof include 2-ethylhexyl group.
In addition, polymers obtained by adding an acid anhydride to a polymer having a hydroxyl group, benzyl (meth) acrylate / (methacrylic acid homopolymer) acrylic acid copolymer, and benzyl (meth) acrylate / (meth) acrylic acid / other monomers And the like.

The content of the binder resin in the liquid crystal composition is preferably 0 to 50% by weight,
-30% by weight is more preferred. When the content exceeds 50% by weight, the alignment of the liquid crystal compound may be insufficient.

In the liquid crystal composition of the present invention, it is preferable to use a surfactant together with the photoreactive chiral agent and the liquid crystal compound. As the surfactant, a surfactant exerting an excluded volume effect is preferable. Here, exerting the excluded volume effect means three-dimensionally controlling the spatial alignment state at the air interface of the surface of the layer when the layer containing the liquid crystal composition is formed by coating. Specifically, nonionic surfactants are preferable, and they can be appropriately selected and used from known nonionic surfactants.

The above-mentioned polymerization inhibitor can be added for the purpose of improving storage stability. Examples thereof include hydroquinone, hydroquinone monomethyl ether, phenothiazine, benzoquinone, and derivatives thereof. The amount of the polymerization inhibitor added is preferably 0 to 10% by weight, more preferably 0 to 5% by weight, based on the polymerizable monomer.

The liquid crystal composition of the present invention can be prepared by dissolving or dispersing each of the above-mentioned components in a suitable solvent, and by molding this into an arbitrary shape or by forming it on a support or the like. . Here, as the solvent, for example, 2-
Butanone, cyclohexanone, methylene chloride, chloroform and the like can be mentioned.

(Method for Changing the Helical Structure of Liquid Crystal) As described above, the liquid crystal composition of the present invention comprises the photoreactive chiral agent (the optically active isosorbide derivative of the present invention), and has the helical structure of the liquid crystal of the present invention. In the method of changing, the helical pitch (twisting force) of the liquid crystal is changed by irradiating the above-mentioned liquid crystal composition of the present invention with a desired amount of light in a desired pattern, thereby changing the helical structure of the liquid crystal, That is, it is possible to form regions having different degrees of twist of the spiral (twisting force; HTP).

Further, particularly when the liquid crystal phase is a cholesteric liquid crystal phase, the selective reflection color of the liquid crystal can be arbitrarily changed according to the twisting force. When the rate of change of the twisting power (twisting rate of change) is large, the color width of the selective reflection color that can be selectively reflected by the liquid crystal is wide, and the selective reflection of a wide wavelength range including the three primary colors (B, G, R) is performed. Can be obtained, which is important in particular because the three primary colors of BGR can be displayed with high color purity. In this respect, in particular, the optically active isosorbide derivative represented by the above-mentioned general formula (I) can greatly change the twisting force of the helical structure of the liquid crystal, and therefore, a liquid crystal composition containing the compound (chiral agent). By using, it is possible to display a wide range of hues including the three primary colors of blue (B), green (G), and red (R), and it is possible to obtain the three primary colors having excellent color purity.

Specifically, it can be carried out as follows. That is, first, similarly to the patterning described in the above-mentioned “method of changing the helical structure of liquid crystal”, light in the photosensitive wavelength region of the optically active isosorbide derivative in the liquid crystal composition is imagewise irradiated. By this light irradiation, the optically active isosorbide derivative is exposed to light to change the helical structure of the liquid crystal, and an image-like pattern is formed (patterning). After this patterning, light in the photosensitive wavelength region of the photopolymerization initiator in the liquid crystal composition is irradiated. Then, the liquid crystal compound is polymerized by the photopolymerization initiator and is fixed in a state where the changed helical structure is retained. Before this step, for example, a step such as nitrogen substitution may be provided.

When the photosensitive wavelength region of the optically active isosorbide derivative is different from the photosensitive wavelength region of the photopolymerization initiator, H
Light irradiation for changing TP and light irradiation for photopolymerization do not influence each other. Therefore, HT
Since photopolymerization does not proceed during imagewise exposure for changing P, patterning with a set HTP change rate is possible, while photopolymerization for fixing the helical structure The optically active isosorbide derivative does not react with light, and the formed HTP change pattern can be reliably immobilized.

In the case of forming a liquid crystal color filter, an optical film, etc., which will be described later, after patterning by imagewise exposing light having a wavelength sensitized by the optically active isosorbide derivative as described above, a photopolymerization initiator is further added. The photopolymerizable group in the liquid crystal composition is photopolymerized by being irradiated with light having a wavelength sensitive to light and cured to fix the helical structure of the liquid crystal in a desired selective reflection color. Details of these forming methods will be described later.

The light source used for light irradiation is the same as the light source exemplified in the description of the above-mentioned "method for changing the helical structure of liquid crystal".

(Liquid Crystal Color Filter) The liquid crystal color filter, optical film and recording medium will be described in detail below. The liquid crystal color filter of the present invention comprises at least a liquid crystal compound and at least one kind of the optically active isosorbide derivative of the present invention, and a nematic liquid crystal compound is most suitable as the liquid crystal compound. Further, if necessary, it comprises a polymerizable monomer, a photopolymerization initiator, other components listed in the liquid crystal composition of the present invention, and a surfactant exerting an excluded volume effect. For example, it can be produced by irradiating light with a desired pattern and light amount appropriately selected based on the above-mentioned “method of changing the helical structure of liquid crystal” and “method of fixing the helical structure of liquid crystal”.

Hereinafter, the liquid crystal color filter of the present invention will be described in detail through the description of the method for producing the liquid crystal color filter. The liquid crystal color filter of the present invention is prepared by appropriately selecting from the liquid crystal composition of the present invention described above and a known composition containing the optically active isosorbide derivative represented by the general formula (I). be able to.
In this case, it may be in the form of a sheet composed only of the liquid crystal composition, or in a mode in which a layer (liquid crystal layer) containing the liquid crystal composition is provided on a desired support or temporary support. May be present, and other layers (films) such as alignment films and protective films
May be provided. In the latter case, two or more liquid crystal layers may be laminated, and in this case, the exposure step described later is performed a plurality of times.

As the nematic liquid crystal compound, the polymerizable monomer, the photopolymerization initiator and other components, the same ones as those usable in the liquid crystal composition of the present invention can be used,
The content, preferable range and the like are the same as in the case of the liquid crystal composition. It is preferable to use a surfactant that exerts an excluded volume effect. The content of the optically active isosorbide derivative represented by the general formula (I) in the liquid crystal composition constituting the liquid crystal color filter is also the same as that of the liquid crystal composition of the present invention described above.

The liquid crystal color filter of the present invention can be preferably prepared, for example, from the liquid crystal composition of the present invention. The method for producing the liquid crystal color filter is not particularly limited, and includes, for example, a step of imagewise exposing with a first light to pattern and then photopolymerizing with a second light to cure (hereinafter, referred to as “ It may be referred to as an “exposure step”). That is, the “method of fixing the helical structure of liquid crystal” of the present invention may be applied. Further, depending on the selected production mode, a step of appropriately performing an alignment treatment on the contact surface with the liquid crystal composition (alignment treatment step), a step of transferring and forming a liquid crystal layer by adhesion and peeling (transfer step), a cholesteric liquid crystal composition May be applied to form a liquid crystal layer (application process).

A specific embodiment using a cholesteric liquid crystal composition will be shown below as an example of the manufacturing method including the exposure step. <Exposure Step> In the exposure step, both patterning and immobilization (polymerization curing) of the liquid crystal compound are performed by irradiation with light. That is, after the optically active isosorbide derivative (hereinafter, also referred to as a “photoreactive chiral agent”) is imagewise exposed to patterning by the first light having a wavelength at which it can be highly sensitively exposed, a polymerization initiator is added. The second light, which is sensitive to light, is photopolymerized and cured to fix the helical structure of the liquid crystal compound in a desired selective reflection color.

When the liquid crystal composition is irradiated with the first light, the coexisting photoreactive chiral agent is exposed to change the helical structure of the liquid crystal compound depending on the illuminance. An image-like pattern is formed by showing a reflection color. Therefore, if the irradiation intensity is changed for each desired region and light is emitted, a plurality of colors are exhibited corresponding to the irradiation intensity, for example,
By exposing through an exposure mask formed by changing the light transmittance like an image, it is possible to simultaneously form an image by one irradiation of light, that is, a colored region that selectively reflects differently. Further, a liquid crystal color filter can be produced by irradiating a second light to cure (fix) the second light.

The wavelength of the first light is preferably set to a wavelength in the photosensitive wavelength range of the photoreactive chiral agent, particularly a wavelength close to the peak wavelength of the photosensitive light, in order to obtain sufficient patterning sensitivity. Further, the wavelength of the second light is preferably set to a wavelength in the photosensitive wavelength range of the polymerization initiator, particularly, a wavelength close to the photosensitive peak wavelength in terms of obtaining sufficient photopolymerization sensitivity. Also, the illuminance (irradiation intensity) of the first and second light
Is not particularly limited, and can be appropriately selected depending on the material used so that sufficient photosensitivity can be obtained during patterning and during polymerization and curing. As the light source used for the irradiation of the first and second lights, the same light source as that used for the light irradiation of the liquid crystal composition can be used.

More specifically, the production methods of the following first and second aspects may be used, and more preferable production is possible by these two aspects. [First Aspect] (1) A step of forming a transfer material having at least a liquid crystal layer by providing a coating liquid crystal composition on a temporary support. The liquid crystal composition in the coating liquid can be prepared by dissolving and dispersing each component in an appropriate solvent. Here, as the solvent,
For example, 2-butanone, cyclohexanone, methylene chloride, chloroform and the like can be mentioned. A cholesteric liquid crystal composition is preferable in the production of a liquid crystal color filter. A cushion layer containing a thermoplastic resin or the like may be provided between the liquid crystal layer and the temporary support from the viewpoint of ensuring adhesion at the time of transfer such as when foreign matter is present on the transfer target. However, it is also preferable that the surface of the cushion layer or the like is subjected to an orientation treatment (orientation treatment step) such as a rubbing treatment. (2) A step of laminating the transfer material on a transparent substrate. In addition to the light-transmitting substrate, an image receiving material having an image receiving layer on the substrate may be used. Alternatively, the liquid crystal composition may be directly applied and formed on the substrate without using the transfer material (application step). The coating can be appropriately selected from known coating methods using a bar coater, a spin coater, or the like. However, the transfer method is preferable in terms of material loss and cost.

(3) A step of peeling the transfer material from the light transmissive substrate to form a cholesteric liquid crystal layer on the substrate (transfer step). The liquid crystal layer may be formed of a plurality of layers by further laminating after passing through the following (4). (4) The cholesteric liquid crystal layer is imagewise irradiated with ultraviolet rays having an illuminance ν ¹ to form a pixel pattern exhibiting a selective reflection color, and the layer is cured by further irradiating it with ultraviolet rays having an illuminance ν ² . Process (exposure process).

[Second Embodiment] (1) A step of forming a liquid crystal layer by directly providing a liquid crystal composition on a support constituting a color filter. Here, the liquid crystal layer can be formed by applying a liquid crystal composition prepared into a coating liquid in the same manner as above by a known coating method using a bar coater, a spin coater or the like. Further, an alignment film similar to the above may be formed between the cholesteric liquid crystal layer and the temporary support. It is also preferable to perform an alignment treatment (alignment treatment step) such as a rubbing treatment on the surface of the alignment film or the like. (2) An exposure process similar to the process (4) of the first aspect.

The thickness of the liquid crystal layer (sheet-shaped liquid crystal composition) that functions as a liquid crystal color filter is 1.5 to
4 μm is preferable.

Further, an example will be described below with reference to FIGS. 1 to 3 are schematic views showing one embodiment of a process for producing the liquid crystal color filter of the present invention. First, each component described above is dissolved in an appropriate solvent to prepare a coating liquid cholesteric liquid crystal composition. Here, each component and solvent are as described above.

As shown in FIG. 1- (A), a support 10 (hereinafter also referred to as a "temporary support") is prepared, and an acrylic resin, polyester, polyurethane or the like is applied and formed on the support 10. Cushion layer (thermoplastic resin layer) 12
And an alignment film 1 made of polyvinyl alcohol or the like
4 is laminated. The alignment film is subjected to rubbing treatment as shown in FIG. 1- (B). This rubbing treatment is not always necessary, but the rubbing treatment can further improve the orientation. Next, Fig. 1-
As shown in (C), a coating liquid cholesteric liquid crystal composition is applied on the alignment film 14 and dried to form a cholesteric liquid crystal layer 16, and then a cover film 18 is provided on the cholesteric liquid crystal layer 16. A transfer material is prepared. Hereinafter, the transfer material is referred to as a transfer sheet 20.

On the other hand, as shown in FIG. 1- (D), another support 22 is prepared, an alignment film 24 is formed on the support in the same manner as described above, and the surface thereof is subjected to a rubbing treatment. Hereinafter, this is referred to as a color filter substrate 26.

Next, after the cover film 18 of the transfer sheet 20 is peeled off, as shown in FIG. 2 (E), the surface of the cholesteric liquid crystal layer 16 of the transfer sheet 20 and the alignment film 24 of the color filter substrate 26. The sheets are superposed so that the surfaces of the sheets are in contact with each other, and are laminated through a roll rotating in the arrow direction in the figure. After that, as shown in FIG. 1- (F), the transfer sheet 20 is peeled off between the alignment film 14 and the cushion layer 12, and then, on the color filter substrate.
The cholesteric liquid crystal layer is transferred together with the alignment film 14.
In this case, the cushion layer 12 is not necessarily the temporary support 10
It does not have to be peeled together.

After the transfer, as shown in FIG. 3- (G), an exposure mask 28 having a plurality of regions having different light transmittances is arranged above the alignment film 14, and the first exposure mask 28 is provided through the mask 28. Light is applied to the cholesteric liquid crystal layer 16 in a pattern. The cholesteric liquid crystal layer 16 contains a liquid crystal compound, a chiral compound or the like so that the spiral pitch varies depending on the light irradiation amount, and the structure having different spiral pitches reflects, for example, green (G) for each pattern, Blue (B)
And a region that transmits red (R), a region that transmits blue (B), a region that transmits green (G) and red (R), a region that reflects red (R), that is, a region that transmits green (G) and blue (B). It is formed so as to form a transparent region.

Next, as shown in FIG. 3- (H), the cholesteric liquid crystal layer 16 is further irradiated with ultraviolet rays at an irradiation intensity different from that of the light irradiation in the step (G) to fix the pattern. Then, 2-butanone, chloroform, or the like is used to remove unnecessary portions (for example, the remaining portion of the cushion layer, the intermediate layer, etc., and the unexposed portion) on the cholesteric liquid crystal layer 16 to obtain the state shown in FIG. As shown, a cholesteric liquid crystal layer having a BGR reflective region can be formed.

Although the method shown in FIGS. 1 to 3 is one form of a method for manufacturing a color filter by a laminating method, it may be a manufacturing method by a coating method in which a liquid crystal layer is directly formed by coating on a color filter substrate. . In this case, when applied to the above aspect, the cholesteric liquid crystal layer is applied onto the alignment film 24 of the color filter substrate 26 shown in FIG. )
The steps shown in are sequentially performed.

Regarding these steps and the materials such as the transfer material and the support to be used, Japanese Patent Application No. 11-342896 and Japanese Patent Application No. 11-343665 previously filed by the present inventors.
It is described in detail in each of the specifications.

As described above, when the liquid crystal composition containing the above-mentioned optically active isosorbide derivative is used, the rate of change in the twisting force of the helical structure of the liquid crystal with respect to the amount of light is large, so that the color width of the selective reflection color that can be exhibited by the liquid crystal is large. Blue that spreads out and has excellent color purity
A liquid crystal color filter composed of three primary colors of (B), green (G) and red (R) can be obtained.

(Optical Film) The optical film of the present invention comprises at least a liquid crystalline compound and at least one kind of the optically active isosorbide derivative of the present invention, and has an optical wavelength arbitrarily set from a wide wavelength range. . If necessary, the composition may contain other components such as a polymerizable monomer, a photopolymerization initiator, and a surfactant exerting an excluded volume effect, which are listed in the liquid crystal composition of the invention, and may be selected as desired. It can be produced by irradiating light with a pattern and a light amount. For example, it can be produced based on the above-mentioned “method of changing the helical structure of liquid crystal” and “method of fixing the helical structure of liquid crystal”.

The optical film of the present invention is appropriately selected from the above-mentioned liquid crystal composition of the present invention and a known composition containing the optically active isosorbide derivative represented by the general formula (I). Can be made. here,
The form of the optical film is not particularly limited, and any of a sheet form composed only of the liquid crystal composition, a form in which a layer containing a liquid crystal composition (liquid crystal layer) is provided on a desired support or temporary support, and the like. Or other layers (films) such as an alignment film and a protective film may be provided.

As the liquid crystal compound, the polymerizable monomer, the photopolymerization initiator, and other components, the same ones as those usable in the liquid crystal composition of the present invention can be used, and their content, preferable range, etc. The same applies to the case of the liquid crystal composition. The content of the optically active isosorbide derivative represented by the general formula (I) in the liquid crystal composition forming the optical film is also the same as that of the liquid crystal composition of the present invention described above.

The optical film of the present invention can be suitably prepared, for example, by using the liquid crystal composition of the present invention. Further, as a method for producing the optical film, a method which is substantially the same as the method for producing the liquid crystal color filter and which includes at least one exposure step may be used. That is, the above-mentioned “method of fixing the helical structure of liquid crystal” may be applied. Further, it may be formed through the above-mentioned alignment treatment step, transfer step, coating step, etc., depending on the manufacturing mode selected. More specifically, it can be manufactured in substantially the same manner as the manufacturing methods of the first and second aspects.

As described above, when the liquid crystal composition containing the above-mentioned optically active isosorbide derivative is used, it is possible to obtain a non-light-absorption type optical film which can largely change the helical pitch of the liquid crystal with respect to the amount of light. For example, when the liquid crystal phase is a cholesteric liquid crystal phase, the optical width of the color selectively reflected by the liquid crystal is widened, and the optical film is composed of various selective reflection colors, and the optical colors of the primary colors (B, G, R) are excellent in color purity. A film or the like can be obtained.

(Recording Medium) The recording medium of the present invention comprises a liquid crystalline compound and at least one kind of the optically active isosorbide derivative of the present invention, and if necessary, a polymerizable monomer, a photopolymerization initiator, and And other components listed in the liquid crystal composition of the present invention, such as a surfactant having an excluded volume effect.

The recording medium of the present invention is not limited in its form, and may be in the form of a sheet consisting of a liquid crystal composition alone, or may be a desired support or temporary support (hereinafter referred to as “support etc.”). Referred to above), and a layer (liquid crystal layer) containing a liquid crystal composition containing a photoreactive chiral agent may be provided thereon. Here, the liquid crystal composition can be appropriately selected from the above-described liquid crystal composition of the present invention and a known composition containing the optically active isosorbide derivative represented by the general formula (I). Furthermore, other layers (films) such as an alignment film and a protective film may be provided.

As the liquid crystal compound, the polymerizable monomer, the photopolymerization initiator, and other components, the same ones as those usable in the liquid crystal composition can be used, and their contents,
The preferred range and the like are the same as in the case of the liquid crystal composition. The content of the optically active isosorbide derivative represented by the general formula (I) in the liquid crystal composition constituting the recording medium is also the same as that of the liquid crystal composition of the present invention described above.

The recording medium of the present invention can be suitably prepared, for example, by providing the above-mentioned liquid crystal composition of the present invention on a support or the like. As a method of providing the liquid crystal composition on a support or the like, (1) using a transfer material in which a liquid crystal layer containing the liquid crystal composition of the present invention is provided on a temporary support, the liquid crystal layer is formed on the support. Transfer method, (2) on support,
A method of directly applying a liquid crystal composition prepared in a coating liquid,
Etc. In the above methods (1) and (2),
With respect to the transfer material and the coating method, the embodiments exemplified in the liquid crystal composition of the present invention (first and second embodiments)
And, it can be adapted according to the description of FIGS.

The recording medium of the present invention produced as described above is irradiated with light in an appropriately selected desired pattern and light amount, so that an image, particularly a cholesteric liquid crystal, is formed according to the change rate of the twisting force of the liquid crystal. In the case of 1, it is possible to form a colored image composed of selective reflection colors determined by the change rate of the spiral pitch. The image formation may be performed based on, for example, the above-mentioned “method of changing the helical structure of liquid crystal” and “method of fixing the helical structure of liquid crystal”. Moreover, when the optically active isosorbide derivative represented by the general formula (I) is used as the chiral agent for changing the liquid crystal structure, the rate of change in the twisting force of the helical structure of the liquid crystal with respect to the amount of light is large, so that an image with a wide color reproduction range is obtained. In particular, in the case of the cholesteric liquid crystal, the hue width selectively reflected by the liquid crystal can be widened, and a multicolored image with various colors and high color purity can be formed. In addition, the large rate of change of the twisting force makes the image formation more sensitive (speed).
It also greatly contributes to. In addition, for example, by using a polymerizable liquid crystal compound or a polymerizable monomer, the liquid crystal after patterning can be fixed, and an image excellent in image stability can be formed.

As a light source for irradiating light, the same light source as that which can be used in the liquid crystal composition of the present invention can be used to suitably perform optical recording. The same applies to light irradiation for fixing the liquid crystal.

As described above, the twisting force (twisting angle) of the liquid crystal can be greatly changed by using the above-mentioned optically active isosorbide derivative as the chiral agent for changing the helical structure of the liquid crystal molecule. Especially in the case of cholesteric liquid crystal using a nematic liquid crystal compound,
The selective reflection wavelength range obtained by light irradiation is widened, and as a result, the color purity of the three primary colors of BGR can be further increased. Therefore, the hue selectivity and vividness of the liquid crystal are improved, and it is possible to display a clear and vivid color image especially in the liquid crystal color filter and the optical film.
In the recording medium, the hue of the image formed can be diversified.

[0127]

EXAMPLES The synthesis and use of the present invention are described below with reference to examples, but the present invention is not limited to these examples. In addition, all "parts" and "%" in an Example represent a "mass part" and "mass%."

Example 1 (Synthesis of Exemplified Compound 1-7) The following compound (A-1) 2 mmol (0.82 g), 1-
A mixture of 4 mmol (0.53 g) of indanone, a catalytic amount of P-toluenesulfonic acid monohydrate and 15 ml of toluene was refluxed for 4 hours using a device equipped with Dean Stark. Thereafter, toluene was distilled off, water was added, and the precipitated solid was collected by filtration and washed with water and methanol. Chloroform was added to this solid, and the mixture was filtered while hot, and methanol was added to the filtrate. The generated solid was collected by filtration to obtain 0.41 g of Exemplified compound (1-7). The yield was 32%.

[Α] _D ²⁵ −181 ° (c0.10, CHC
l ₃₎ the crystals obtained from the ¹ H-NMR (CDCl ₃₎ are shown below the data identified by the analysis. δ (in ppm from tetra
methylsilane); 8.24-8.06 (m, 4H),
7.94 (s, 1H), 7.91 (s, 1H), 7.8
2-7.38 (m, 12H), 5.58-5.40
(M, 2H), 5.16-5.06 (m, 1H), 4.
77-4.69 (m, 1H), 4.22-4.00
(M, 8H)

[0130]

[Chemical formula 26]

[Example 2] (Synthesis of Exemplified Compound 1-8) In Example 1, 1-indanone was replaced with 6-methoxy-1.
-Exemplified compound (1-8) was obtained in the same manner as in Example 1 except that indanone was used. Yield 36%. The data identified by [α] _D ²⁵ −163 ° (c0.10, CHCl ₃ ) ¹ H-NMR (CDCl ₃ ) are shown below. δ (TMS); 8.17 (d, 2H), 8.11
(D, 2H), 7.76 (d, 2H), 7.33 (d,
2H), 7.70-7.65 (m, 2H), 7.48.
(D, 2H), 7.39 (s, 2H), 7.23 (d,
2H), 5.58-5.41 (m, 2H), 5.15-
5.05 (m, 1H), 4.76-4.68 (m, 1
H), 4.20-3.94 (m, 4H), 3.89.
(S, 6H)

[Example 3] (Synthesis of Exemplified Compound 1-9) In Example 1, 1-indanone was replaced with 5-methoxy-1.
-Exemplified compound (1-9) was obtained in the same manner as in Example 1 except that indanone was used. Yield 36%. The data identified by [α] _D ²⁵ −173 ° (c0.10, CHCl ₃ ) ¹ H-NMR (CDCl ₃ ) are shown below. δ (TMS); 8.17 (d, 2H), 8.09
(D, 2H), 7.88 (d, 2H), 7.76 (d,
2H), 7.71 (d, 2H), 7.67-7.60.
(M, 2H), 7.02 (s, 2H), 6.98 (d,
2H), 5.58-5.42 (m, 2H), 5.16-
5.06 (m, 1H), 4.79-4.71 (m, 1
H), 4.20-4.00 (m, 8H), 3.94.
(S, 6H)

Example 4 (Synthesis of Exemplified Compound 1-10) The same as Example 1 except that 1-indanone was replaced with 6- (2-ethylhexyloxy) -1-indanone in Example 1. The exemplary compound (1-10) was obtained. Yield 65%. The data identified by [α] _D ²⁵ -147 ° (c0.10, CHCl ₃ ) ¹ H-NMR (CDCl ₃ ) are shown below. δ (TMS); 8.17 (d, 2H), 8.09
(D, 2H), 7.77 (d, 2H), 7.74 (d,
2H), 7.70-7.63 (m, 2H), 7.46.
(D, 2H), 7.36 (s, 2H), 7.24 (d,
2H), 5.57-5.61 (m, 2H), 5.15-
5.05 (m, 1H), 4.76-4.69 (m, 1
H), 4.20-3.85 (m, 12H), 1.90-
0.80 (m, 30H)

Example 5 (Synthesis of Exemplified Compound 1-17) Exemplified Compound (1-17) was prepared in the same manner as in Example 1 except that 1-indanone was replaced with α-tetranone. Got Yield 25%. The data identified by [α] _D ²⁵ -149 ° (c0.10, CHCl ₃ ) ¹ H-NMR (CDCl ₃ ) are shown below. δ (TMS); 8.20-8.02 (m, 6H),
7.90-7.84 (m, 2H), 7.58-7.21
(M, 10H), 5.56-5.40 (m, 2H),
5.13-5.04 (m, 1H), 4.75-4.69
(M, 1H), 4.20-4.00 (m, 4H), 3.
20-2.86 (m, 8H)

Example 6 (Synthesis of Exemplified Compound 1-29) Exemplified Compound (1-29) was prepared in the same manner as in Example 1 except that 1-indanone was replaced with 4-chromanone. Got Yield 10%. The data identified by [α] _D ²⁵ −138 ° (c0.10, CHCl ₃ ) ¹ H-NMR (CDCl ₃ ) are shown below. δ (TMS); 8.17 (d, 2H), 8.10
(D, 2H), 8.03 (d, 2H), 7.88 (s,
2H), 7.52 (dd, 2H), 7.41 (d, 2)
H), 7.39 (d, 2H), 7.10 (dd, 2)
H), 6.99 (d, 2H), 5.57-5.41.
(M, 2H), 5.38-5.29 (m, 4H), 5.
13-5.03 (m, 1H), 4.76-4.68
(M, 1H), 4.22-4.00 (m, 4H)

Example 7 (Synthesis of Exemplified Compound 1-34) Exemplified Compound (1-29) was prepared in the same manner as in Example 1 except that 1-indanone was replaced with 2-coumaranone. Got Yield 55%. The data identified by [α] _D ²⁵ −142 ° (c0.10, CHCl ₃ ) ¹ H-NMR (CDCl ₃ ) are shown below. δ (TMS); 8.22 (d, 2H), 8.15
(D, 2H), 7.88 (s, 1H), 7.86 (s,
1H), 7.77 (d, 2H), 7.74 (d, 2)
H), 7.63 (dd, 2H), 7.38 (dd, 2)
H), 7.15 (d, 2H), 7.08 (d, 1H),
7.04 (d, 1H), 5.59-5.42 (m, 2
H) 5.17-5.07 (m, 1H), 4.79-4.
71 (m, 1H), 4.25-4.03 (m, 4H)

[Examples 8 to 11] (Measurement of Change in Helical Pitch by Light Irradiation) From the exemplified compounds of the optically active isosorbide derivative (photoreactive chiral agent) of the general formula (I), the following Table 1 is shown. The four kinds shown were mixed at the addition amount indicated in the nematic liquid crystal composition (“ZLI-1132” manufactured by Merck Ltd.),
It was injected into a wedge-shaped cell (glass thickness 1.1 mm, blue plate) which was uniaxially oriented with a polyimide orientation film. Here, measure the helical pitch at room temperature using a polarization microscope,
This was converted to helical twisting power (HTP) to obtain initial HTP data and entered in Table 1.

Then, the wedge-shaped cell was irradiated with ultraviolet rays from a high-pressure mercury lamp at an irradiation intensity of 300 mW / cm ² for 3 minutes. After the irradiation, the spiral pitch at room temperature was measured in the same manner as above, converted into HTP, and the rate of change of HTP was determined from the difference from the initial value.
As is clear from Table 1, the twisting force (HTP) of the spiral could be greatly changed by the irradiation of ultraviolet rays. still,
When the direction of the twist before and after the ultraviolet irradiation was confirmed by the contact method, it was a right twist before and after the irradiation.

[0139]

[Table 1]

[Example 12, Comparative Examples 1 and 2] (Change of Spiral Pitch by Light Irradiation) The method of light irradiation was carried out by using a transilluminator having a light source center wavelength around 370 nm (manufactured by Upland Co., 4.8).
mW / cm ² ) for 10 seconds, and for the compound (1-29) of the optically active isosorbide derivative and the compounds of Comparative Examples 1 and 2 shown below, the helical pitch by light irradiation was performed in the same manner as in the above example. Was measured, and the results are shown in Table 2. The optically active isosorbide derivative of the present invention is
It was found that the sensitivity is high even for light near 370 nm. In addition, after holding the sample in which the spiral pitch was changed on the hot plate at 140 ° C. for 5 minutes,
Similarly, the spiral pitch was measured, and the results are shown in Table 2.
It was found that the optically active isosorbide derivative of the present invention has high thermal stability.

[0141]

[Chemical 27]

[0142]

[Table 2]

[Example 13] (Preparation of broadband circularly polarized light reflection plate) (1) Preparation of substrate A polyimide alignment film ("LX-1400" manufactured by Hitachi Chemical DuPont Co., Ltd.) coating solution was spun on a glass substrate. It was applied by a coater, dried in an oven at 100 ° C. for 5 minutes, and then baked in an oven at 250 ° C. for 1 hour to form an alignment film. Further, the surface of the film was subjected to orientation treatment by rubbing treatment to produce a glass substrate with an orientation film.

(2) Preparation On the alignment film of the glass substrate with an alignment film obtained above, a coating solution prepared by the following formulation was applied by a bar coater, and 1
After holding for 5 minutes on a hot plate at 10 ° C., light irradiation was carried out for 1 minute by an ultra-high pressure mercury lamp through a bandpass filter having a light source center wavelength of 365 nm at that temperature. Then, the temperature was maintained at 110 ° C. for 5 minutes in the dark, the bandpass filter was then removed, and the entire surface was further exposed with an irradiation energy of 500 mJ / cm ² by the same ultra-high pressure mercury lamp as above while blowing nitrogen gas, It was polymerized and cured. The circularly polarized light reflection plate was produced as described above.

[0145]

[Chemical 28]

The circularly polarized light reflection plate obtained as described above is 450
Shows selective reflection in a wide wavelength range of up to 650 nm,
It had a sufficient band characteristic as a broadband circularly polarized light reflector. Moreover, the right circularly polarized light reflectance at the selective reflection wavelength of 550 nm was 94%.

Example 14 (Production of Liquid Crystal Color Filter) (1) Preparation of Filter Substrate A polyimide alignment film (“LX-1400” manufactured by Hitachi Chemical DuPont Co., Ltd.) coating solution was applied onto a glass substrate using a spin coater. After coating and drying in an oven at 100 ° C. for 5 minutes, it was baked in an oven at 250 ° C. for 1 hour to form an alignment film. Further, the surface of the film was subjected to orientation treatment by rubbing treatment to produce a glass substrate with an orientation film.

(2) Formation of Filter Layer On the orientation film of the glass substrate with an orientation film obtained above, a coating solution for photosensitive resin layer prepared by the following formulation was applied by a spin coater, and this was applied at 110 ° C. And dried in an oven for 2 minutes to form a photosensitive resin layer.

[0149]

[Chemical 29]

Next, the photosensitive resin layer was developed by holding it on a hot plate at 110 ° C. for 5 minutes so that the surface of the glass substrate was in contact with it. Further, on the photosensitive resin layer, the transmittance was varied in three stages (0%, 46%, 92%), and respective regions were arranged corresponding to blue pixels, green pixels and red pixels. An ultra-high pressure mercury lamp was placed through a photomask and a bandpass filter having a central wavelength of 365 nm, and irradiation was performed with the ultrahigh pressure mercury lamp through the photomask and the bandpass filter for patterning. The irradiation energy at this time is 120 mJ for the red pixel.
/ Cm ² and the irradiation intensity was 30 mW / cm ² .

Next, the photomask and the bandpass filter were removed, and instead, a sharp cut filter that transmitted light of 400 nm or more (50% transmission at 400 nm) was attached, and the same ultra-high pressure mercury lamp as above was blown while blowing nitrogen gas. Then, the entire surface was further exposed with irradiation energy of 500 mJ / cm ² to polymerize and cure. Furthermore, in order to accelerate the curing degree of the filter part (photosensitive resin layer), 220 ° C
It was baked in the oven for 20 minutes to obtain a color filter having a pattern of red pixels, green pixels and blue pixels.
At the time of the patterning, the helical pitch of the liquid crystal (twisting force of the liquid crystal) can be largely changed by irradiation, and a pixel pattern of red, green, and blue with high color purity can be formed.

Example 15 (Production of Optical Compensation Film for STN Element) Polyacetyl alcohol (PV having a saponification degree of 99.5% was prepared on triacetyl cellulose (TAC) having a thickness of 80 μm.
A) The film was formed by the bar coating method and heated at 110 ° C. for 3 minutes. A rubbing treatment was applied to the PVA film, and a coating solution prepared according to the following formulation was applied by heating with a bar coater and dried in an oven at 120 ° C. for 3 minutes to form a film.

[0153]

[Chemical 30]

Next, at a temperature of 100 ° C., ultraviolet irradiation (irradiation energy 1
000 mJ / cm ² ) to polymerize and cure the film,
An optical compensation film for N element (hereinafter referred to as "STN compensation film") was produced. The thickness of the STN compensation film at this time was measured and found to be 5.0 μm. From the polarization transmission spectrum profile of the STN compensation film, it was found that the orientation (helical structure) of the liquid crystal molecules was twisted in the film thickness direction at 240 degrees, and the twist angle (rotation angle) of the helix was 240 degrees.

Further, this film was prepared as an STN compensation film having a twist angle (-240 degrees) opposite to that of the film, and these were superposed so that liquid crystal molecules in the matched portions were orthogonal to each other.
Insert it between two polarizing plates whose absorption axes are orthogonal to each other,
When observed visually, it showed a good black color. Therefore, the film (STN compensation film) formed as described above is
It was confirmed that the film was functioning as an optical compensation film for N element.

[Example 16] (Prevention of Reverse Twist Domain for TN Device) A polyimide alignment film (manufactured by Hitachi Chemical DuPont Co., Ltd., "LX-140") was formed on the ITO film-coated glass substrate.
0 ") The coating solution is applied by a spin coater and the temperature is 100 ° C.
After drying for 5 minutes in the oven, the alignment film was formed by baking in the oven at 250 ° C. for 1 hour. Further, the surface of the film was subjected to a rubbing treatment, and an orientation treatment was performed so that the rubbing angle was 90 degrees, to prepare two glass substrates with an orientation film. The alignment films of the glass substrate with the alignment film were arranged so as to face each other, and were bonded by a two-component epoxy resin adhesive mixed with spacer beads having a diameter of 6 μm to form a driving cell. The thickness of the cell was measured by an optical interference method and found to be 5.4 μm. A composition having the following composition was injected into the cell.

[0157]   <Composition> -Nematic liquid crystal composition ("ZLI-1132" manufactured by Merck & Co.) ... 99.9% -Photoreactive chiral agent of the present invention (Exemplified compound 1-17) ........... 0.1%

Next, when a driving cell after injection was inserted between two polarizing plates whose absorption axes were orthogonal to each other and visually observed, generation of a reverse twist domain was not recognized. Therefore, it is possible to expect an image display excellent in contrast and color purity without the deterioration of contrast due to the occurrence of reverse twist.

[0159]

INDUSTRIAL APPLICABILITY According to the present invention, a novel compound having photosensitivity to light near 365 nm, capable of isomerizing by light to change its structure, and having excellent thermal stability of cis-isomer after photoisomerization It is possible to provide various optically active compounds. According to the present invention, the orientation of the liquid crystalline compound can be controlled, and the rate of change in the helical pitch (twisting force) of the liquid crystal due to light (torsion change rate) is large. For example, when a nematic liquid crystal compound is used,
A wide range of selective reflection including primary colors (B, G, R) is possible, and a photoreactive chiral agent capable of displaying three primary colors with high color purity can be provided. ADVANTAGE OF THE INVENTION According to this invention, the helical pitch (twisting force) of a liquid crystal can be changed by light, and the photoreactive chiral agent with a large twist change rate is included, and the orientation state of a liquid crystal molecule is greatly controlled three-dimensionally by light. A liquid crystal composition capable of changing optical characteristics can be provided. For example, in the case of a cholesteric liquid crystal, it is possible to provide a liquid crystal composition which exhibits a wide range of selectively reflected colors including the three primary colors when irradiated with light and can display the three primary colors with excellent color purity.

According to the present invention, the liquid crystal composition containing a photoreactive chiral agent having a large twist change rate is irradiated with light to change the helical pitch (twisting force) of the liquid crystal, thereby changing the helical structure of the liquid crystal. A method can be provided. According to the present invention, to a liquid crystal composition containing a photoreactive chiral agent having a large twist change rate, after imagewise exposure, it is possible to fix the patterned spiral pitch in a maintained state without impairing,
In particular, when the liquid crystal phase is a cholesteric liquid crystal phase, the method for fixing the spiral structure of the liquid crystal, which can fix the spiral structure of the liquid crystal to a desired selective reflection color and obtain a hue with high color purity, is provided. You can

According to the present invention, it is possible to provide a liquid crystal color filter having a high color purity, which contains a photoreactive chiral agent capable of largely changing the helical pitch (twisting force) of liquid crystal by light irradiation. According to the present invention, it is possible to provide a non-light-absorption type optical film containing a photoreactive chiral agent capable of significantly changing the twisting force of liquid crystal by light irradiation. For example, when a cholesteric liquid crystal phase is used, an optical film having a wide selective reflection region and high color purity can be provided. According to the present invention, it is possible to provide a recording medium containing a photoreactive chiral agent capable of largely changing the twisting power of liquid crystal by light irradiation and capable of forming a clear image by changing the light amount in an imagewise manner. . For example, when a cholesteric liquid crystal phase is used, it is possible to provide a recording medium capable of forming an image of a selective reflection color having a wide hue and high color purity.

[Brief description of drawings]

FIG. 1 is a schematic view showing a part of a process of manufacturing a liquid crystal color filter of the present invention.

FIG. 2 is a schematic view showing a part of a process of manufacturing a liquid crystal color filter of the present invention.

FIG. 3 is a schematic view showing a part of the process of manufacturing a liquid crystal color filter of the present invention.

[Explanation of symbols]

10 Support (temporary support) 12 Cushion layer (thermoplastic resin layer) 14,24 Alignment film 16 Liquid crystal layer (liquid crystal composition) 18 cover film 20 Transfer sheet 22 Substrate 26 Color filter substrate 28 Exposure mask

Front page continuation (51) Int.Cl. ⁷ Identification code FI theme code (reference) G02B 5/30 G02B 5/30 4H027 G02F 1/13 102 G02F 1/13 102 500 500 1/1335 505 1/1335 505 / / C07M 7:00 C07M 7:00 F-term (reference) 2H048 BA04 BA11 BA64 BB02 BB14 BB22 BB42 FA04 FA09 FA15 FA23 2H049 BA03 BA06 BA43 BB03 BB49 BB62 BC04 BC05 BC22 2H088 EA62Y1235Y01 HA11 FA02 2H071 HA11 FA02 2H071 HA11 FA02 CC12 DD04 EE05 FF15 HH05 JJ01 JJ06 KK14 LL05 4H027 BA02 BA11 BD16 DH02 (54) [Title of Invention] Optically active isosorbide derivative and its production method, photoreactive chiral agent, liquid crystal composition, liquid crystal color filter, optical film and recording medium , And a method of changing the helical structure of liquid crystal, a method of fixing the helical structure of liquid crystal

Claims (10)

[Claims] 1. An optically active isosorbide derivative represented by the following general formula (I): [Chemical 1] [In the general formula (I), A ¹ and A ² each independently represent an aryl group, and B ¹ and B ² each independently represent a hydrogen atom or an alkyl group. Further, A ¹ and B ¹ or A ² and B ² represent a group capable of binding to each other to form a 5-membered ring or a 6-membered ring. R ¹ and R ² each independently represent a hydrogen atom or an alkyl group. L ¹
And L ² each independently represent a halogen atom, an alkyl group or an alkoxy group. m and n each independently represent an integer of 0 to 4, when m represents an integer of 2 or more, L ¹ may be the same group or different groups, and when n represents an integer of 2 or more, L ² May be the same group or different groups. ] 2. A photoreactive chiral agent comprising the optically active isosorbide derivative according to claim 1. 3. A liquid crystal composition containing at least a liquid crystal compound and at least one of the optically active isosorbide derivatives according to claim 1. 4. A liquid crystal composition comprising a liquid crystal compound having at least one polymerizable group, at least one of the optically active isosorbide derivatives according to claim 1, and a photopolymerization initiator. 5. The liquid crystal composition according to claim 4, wherein the optically active isosorbide derivative according to claim 1 and the photopolymerization initiator have different photosensitive wavelength regions. 6. A liquid crystal helical structure, which comprises irradiating the liquid crystal composition according to claim 3 with light to change the structure of the optically active isosorbide derivative represented by the general formula (I). How to change. 7. The liquid crystal composition according to claim 3, after imagewise irradiation with light in the photosensitive wavelength region of the optically active isosorbide derivative represented by the general formula (I), A method for fixing a helical structure of liquid crystal, which comprises a step of performing photopolymerization by irradiating light in a photosensitive wavelength region of a photopolymerization initiator. 8. A liquid crystal color filter containing at least a liquid crystalline compound and at least one of the optically active isosorbide derivatives according to claim 1. 9. An optical film containing at least a liquid crystalline compound and at least one kind of the optically active isosorbide derivative according to claim 1. 10. A liquid crystal compound at least, and
A recording medium containing at least one of the optically active isosorbide derivative described in (1).