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Compound and liquid crystal composition and liquid crystal display device thereof

A compound and general formula technology, applied in the field of liquid crystal display devices, can solve the problems of narrow temperature range and insufficient contrast, and achieve the effects of wide temperature range, low threshold voltage and mild reaction

Pending Publication Date: 2022-01-25
JIANGSU HECHENG ADVANCED MATERIALS
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] Although this type of compound has a large absolute value of dielectric anisotropy, it has the problems of narrow temperature range and insufficient contrast

Method used

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  • Compound and liquid crystal composition and liquid crystal display device thereof
  • Compound and liquid crystal composition and liquid crystal display device thereof
  • Compound and liquid crystal composition and liquid crystal display device thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0235] The synthetic route of the compound of formula I-1-1-5 is as follows:

[0236]

[0237] Step 1. Preparation of compounds of formula 3

[0238] Add 20.2g of the compound of formula 1 ((4-ethoxy-2,3-difluorophenyl) boronic acid), 19.1g of the compound of formula 2 (2-bromo-6-fluorophenol) and 21.2g in a 500mL three-necked flask g sodium carbonate, fully dissolved with 290mL of a mixed solvent composed of toluene, ethanol and water (the volume ratio of toluene, ethanol and water is 15:7:7), under nitrogen protection conditions, add 0.07g dichlorodi-tert-butyl -(4-Dimethylaminophenyl)phosphine palladium(II), react at a temperature of 70°C to 80°C for 3h. After the reaction is complete, cool to room temperature, separate the liquids, extract the aqueous phase with toluene, combine the organic phases, wash the organic phases with water, dry them with anhydrous sodium sulfate, dissolve them in petroleum ether, pass through 10 g of 80-120 mesh silica gel, concentrate, and u...

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PUM

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Abstract

The invention provides a compound, a liquid crystal composition thereof and a liquid crystal display device. The compound is shown in a general formula I, and has a large clearing point, large optical anisotropy and a large dielectric anisotropy absolute value. The liquid crystal composition containing the compound has, under the condition of maintaining proper low-temperature storage time, a relatively large clearing point, relatively large optical anisotropy and a relatively large dielectric anisotropy absolute value, so that the liquid crystal display device containing the liquid crystal composition has a relatively wide temperature application range, relatively good contrast ratio and relatively low threshold voltage.

Description

technical field [0001] The invention relates to the field of liquid crystals, in particular to a compound, a liquid crystal composition containing the compound and a liquid crystal display device containing the liquid crystal composition. Background technique [0002] Liquid crystal display elements can be used in various home appliances represented by clocks and electronic calculators, measuring equipment, automotive panels, word processors, computers, printers, televisions, and the like. According to the type of display mode, it is divided into PC (phase change, phase change), TN (twist nematic, twisted nematic), STN (super twisted nematic, super twisted nematic), ECB (electrically controlled birefringence, electrically controlled birefringence), OCB (optically compensatedbend , optical compensation bending), IPS (in-plane switching, in-plane transition), VA (vertical alignment, vertical alignment) and other types. According to the driving method of the component, it is d...

Claims

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Application Information

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IPC IPC(8): C07D493/04C09K19/44C09K19/34
CPCC07D493/04C09K19/44C09K19/3405C09K2019/3408
Inventor 徐爽赵李亮宋晓龙陈法兵叶守陈吴玉成
Owner JIANGSU HECHENG ADVANCED MATERIALS
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