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Liquid crystal compound, liquid crystal composition, thin film, and liquid crystal display

A liquid crystal compound and liquid crystal phase technology, applied in liquid crystal materials, chemical instruments and methods, instruments, etc., can solve the problems of orientation disorder and enlargement, and achieve the effect of wide viewing angle

Active Publication Date: 2008-07-09
FUJIFILM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, once a polymerizable functional group is introduced into a biaxial liquid crystal compound, it is easy to cause a mixed orientation (non-biaxial)
In addition, it is considered that orientation disorder is also prone to occur due to the increase of the pre-tilt angle of liquid crystal compound molecules at the air interface

Method used

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  • Liquid crystal compound, liquid crystal composition, thin film, and liquid crystal display
  • Liquid crystal compound, liquid crystal composition, thin film, and liquid crystal display
  • Liquid crystal compound, liquid crystal composition, thin film, and liquid crystal display

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0129] (Synthesis of Example Compound (1))

[0130] Example compound (1) was synthesized according to the following scheme.

[0131]

[0132] At room temperature, 139 g (2.1 mol) of 50% hydroxylamine aqueous solution was added dropwise into 144.0 g (1.05 mol) of 2-fluoro-4-cyanophenol in methanol solution. The temperature of the reaction system was gradually raised and stirred under reflux for 3 hours. After the reaction, it was ice-cooled, and cold water was added to the reaction system for crystal precipitation. The crystals thus obtained were collected by filtration and dried to obtain 139.5 g of (1-A) (yield 82%).

[0133] At room temperature, 8.1ml (0.1mol) of pyridine was added to 300ml of N,N-dimethylacetamide containing 17g (0.1mol) (1-A), and 6.7g (33mmol) of Phthaloyl chloride. After the addition, it was stirred at room temperature for 30 minutes, then the reaction temperature was raised to 100°C. Stir like this for 3 hours, then cool naturally. When methano...

Embodiment 2

[0138] (Synthesis of Example Compound (2))

[0139] Example compound (2) was synthesized according to the following scheme.

[0140]

[0141] Example compound (2) was obtained through the same process, except that the octyl chloroformate in Example 1 was changed to 2-methylpropyl chloroformate.

[0142] The phase transition temperature of Example Compound (2) thus obtained was determined by DSC measurement, and the crystal structure was observed under a polarizing microscope, whereby the following results were obtained.

[0143]

Embodiment 3

[0145] (Synthesis of Example Compound (3))

[0146] Example compound (3) was synthesized according to the following scheme.

[0147]

[0148] Example compound (3) was obtained through the same process, except that the octyl chloroformate in Example 1 was changed to 4-acryloylbutyl chloroformate.

[0149] The phase transition temperature of Example Compound (3) thus obtained was determined by DSC measurement, and the crystal structure was observed under a polarizing microscope, whereby the following results were obtained.

[0150]

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Abstract

The present invention provides a liquid crystal compound comprising regions of aromatic heterocycles and aromatic hydrocarbon rings linked together by single bonds, said liquid crystal compound exhibiting a nematic liquid crystal phase satisfying the relational formula (1): 1.1≤( nx-nz) / (nx-ny)≤20, nx, ny and nz represent the refractive index in the three intersecting directions of the nematic liquid crystal phase, nx is the maximum refractive index, and nz is the minimum refractive index.

Description

technical field [0001] The present invention relates to a liquid crystal compound exhibiting a biaxial liquid crystal phase, a thin film using the liquid crystal compound, and a liquid crystal display using the liquid crystal compound. In addition, the present invention also relates to a liquid crystal compound having a specific structure suitable for use in a retardation plate or the like, a film using the liquid crystal compound, and a liquid crystal display using the liquid crystal compound. Background technique [0002] A biaxial film capable of controlling the refractive index in each three-dimensional direction can be used in the field of optical science using polarization. The biaxial films are particularly useful in the field of liquid crystal displays because of their suitability for controlling polarization. [0003] Biaxial thin films prepared using biaxial liquid crystal compounds have been reported (for example, see JP-A-2002-6138). An optical film prepared us...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D271/06C09K19/34G02B5/30G02F1/13363
CPCC07D271/06C07D413/14C09K19/348C09K19/3497G02F1/133633
Inventor 上平茂生
Owner FUJIFILM CORP
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