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Liquid crystal compound and application thereof

A liquid crystal compound and liquid crystal composition technology, applied in liquid crystal materials, chemical instruments and methods, optics, etc., can solve the problems of not using liquid crystal composition, etc., and achieve the effects of stable properties, low viscosity, and good mutual solubility

Active Publication Date: 2013-01-16
BEIJING BAYI SPACE LCD MATERIALS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In 1989, Merck of Germany disclosed the liquid crystal composition with difluoromethyl ether bridges in the patent US5045229, but it was not applied to the liquid crystal composition

Method used

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  • Liquid crystal compound and application thereof
  • Liquid crystal compound and application thereof
  • Liquid crystal compound and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027]

[0028] a:n-BuLi,CO 2 ,H 2 O;b:CF 3 SO 3 ,HS(CH 2 ) 3 SH; c: 3,5-difluoro-4-benzyloxyphenol, Et 3 N;d:3HF.Et 3 N;e:Br 2

[0029] Add 0.1 moles of 1-(4-propylcyclohexyl)-2-(3,5-difluorophenyl)propane and 0.2L tetrahydrofuran to the three-necked flask in sequence, cool to -70°C, and slowly drop 0.11 moles of n-butyllithium, keep the temperature for 1 hour after the dropwise addition. Introduce dry carbon dioxide gas until no longer exothermic. 1.0M hydrochloric acid and 1.0L ice water are used for hydrolysis, and the pH value is adjusted to be below 1 after hydrolysis. Add 0.4L of toluene and stir for 5 minutes, let stand for 10 minutes, and separate the liquids. The upper layer is the product phase, washed three times with 0.2L×3 water, and dried with 20g of anhydrous magnesium sulfate for 1 hour. The desiccant was filtered, and the solvent was distilled off to obtain a light yellow solid, which was recrystallized from absolute ethanol to obtain a white s...

Embodiment 2

[0039]

[0040] Synthesis of 5-(4-propylbicyclohexyl)acetyl-1,3-difluorobenzene

[0041]Add 0.48 moles of magnesium chips and 200 milliliters of tetrahydrofuran (THF) successively in the there-necked flask, heat to reflux, add dropwise 20 milliliters of 4-propyl bicyclohexyl methyl bromide and 100 milliliters of tetrahydrofuran (THF) to initiate the reaction. Add the remaining solution dropwise at ℃, continue to reflux for 1 hour, and then add dropwise a solution composed of 0.4 moles of 3,5-difluorobenzonitrile and 300 ml of toluene at 70°C, and reflux for 4 hours after the dropwise addition, then slowly add 500 The ml of 2M hydrochloric acid was refluxed for 2 hours, separated, washed with water until neutral, evaporated to remove the solvent, and recrystallized with 4 times absolute ethanol to obtain 84.8 g of A1 as a white solid. The gas phase purity is 99.2%.

[0042]

[0043] Synthesis of 1-(4-propylbicyclohexyl)-2-(3,5-difluorophenyl)propane

[0044] Add 0.2 mol...

Embodiment 3

[0054] The liquid crystal compound was prepared according to the following components and their proportions, and its properties are shown in Table 1.

[0055] Component Servings

[0056]

[0057]

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PUM

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Abstract

The invention relates to a liquid crystal compound and the application thereof. The liquid crystal compound comprises iospropane bridged bonds, and a perfluorinated propoxyl group is arranged at a molecular end. The compound has the structural formula. The liquid crystal compound has the advantages of stable quality, good intersolubility, low viscosity and large dielectric anisotropy.

Description

technical field [0001] The invention relates to the technical field of liquid crystals, in particular to a liquid crystal compound and its application. Background technique [0002] At present, liquid crystals are widely used in the field of information display, and at the same time, some progress has been made in the application of optical communication (S.T.Wu, D.K.Yang. Reflective Liquid Crystal Displays. Wiley, 2001). In recent years, the application fields of liquid crystal compounds have been significantly expanded to various display devices, electro-optic devices, electronic components, sensors, etc. For this reason, many different structures have been proposed, especially in the field of nematic liquid crystals, and nematic liquid crystal compounds have been most widely used in flat panel displays so far. Especially for TFT active matrix systems. [0003] At present, the technology of TFT-LCD products has matured and successfully solved technical problems such as v...

Claims

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Application Information

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IPC IPC(8): C09K19/30C09K19/44G02F1/13
Inventor 姜天孟杭德余田会强陈海光高立龙贺树芳班全志
Owner BEIJING BAYI SPACE LCD MATERIALS TECH
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