Liquid crystal composition and liquid crystal display device comprising same

A liquid crystal composition and liquid crystal display technology, which are applied in the directions of liquid crystal materials, instruments, chemical instruments and methods, can solve the problems of incomplete theoretical explanations and changes in the performance of conventional liquid crystal parameters, and achieve good UV resistance, suitable dual The effect of refractive index anisotropy, moderate optical anisotropy Δn

Active Publication Date: 2015-02-04
SHIJIAZHUANG CHENGZHI YONGHUA DISPLAY MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Small changes in liquid crystal molecules will cause significant changes in the conventional parameters of liquid crystals, and will also have a significan

Method used

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  • Liquid crystal composition and liquid crystal display device comprising same
  • Liquid crystal composition and liquid crystal display device comprising same
  • Liquid crystal composition and liquid crystal display device comprising same

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0074] Example 1

[0075]

[0076] step one

[0077] Add 189g (0.58mol) 2',3,5-trifluoro-4"-propyl-1,1'; 4',1"-terphenyl, 1.7L tetrahydrofuran, N2 protection in a 3L three-necked flask, and cool to- 70°C. Add 256ml (0.64mol) butyllithium dropwise, dropwise time 0.5h, control the temperature between -65-75℃, finish the dripping, keep for 0.5h, control the temperature between -65-75℃; drip 73.5 g(0.7mol) trimethyl borate, dripping time 0.5h, temperature control between -65-75℃, after dripping, keep for 1h, control temperature between -65-75℃.

[0078] The temperature rises naturally to -20°C. Pour the material liquid into the aqueous hydrochloric acid solution to pH 2, stir for 5 min, separate the liquids, wash the aqueous phase with 500ml×2 ethyl acetate, combine the organic phases, wash the organic phase with 800ml×2 water, and dry with anhydrous sodium sulfate.

[0079] Concentrate the solvent, heat 600ML petroleum ether to dissolve the product, reduce to room temperature, filter...

Example Embodiment

[0098] Example 2

[0099]

[0100] step 1

[0101] Add 10g (0.03mol) 2',3,5-trifluoro-4"-propyl-1,1'; 4',1"-terphenyl, tetrahydrofuran 120ml, nitrogen protection, and cool to -70 in a 1L three-necked flask ℃.

[0102] Add 14.4ml (0.036mol) of butyllithium dropwise, keep for 30 minutes after adding, add 3.3g of DMF dropwise, keep for 1 hour. The temperature was raised to -40°C naturally, the reaction solution was poured into 20 g hydrochloric acid and 100 mL water, and the liquid was separated. The aqueous phase was extracted with ethyl acetate 100 mL×2, washed with 150 mL×2, dried with anhydrous sodium sulfate, and spin-dried 15 g.

[0103] Add 30 g of petroleum ether to dissolve the product and recrystallize at -20°C, and filter with suction to obtain 9.8 g of product (2-a).

[0104] Step 2

[0105]

[0106] Add 9.8 g (0.028 mol) (2-a), 150 mL of methanol, and 50 mL of water to a 500 ml three-necked flask, add 3 g of potassium borohydride in batches, and the reaction solution is heat...

Example Embodiment

[0114] Example 3

[0115]

[0116]

[0117] Δε[1KHz,20℃]: 9.2

[0118] Δn[589nm,20℃]: 0.099

[0119] Cp: ​​72°C

[0120] γ 1 [25℃]: 53mPa.s

[0121] This liquid crystal composition has a moderate Δε, a moderate Δn, and a very low γ 1 , Suitable for fast response TN, IPS, FFS-TFT display liquid crystal materials.

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Abstract

The invention relates to a liquid crystal composition which comprises compounds disclosed as the following general formula. The composition has the advantages of low viscosity gamma1, moderate dielectric anisotropy DeltaEpsilon and moderate optical anisotropy Deltan, and can implement quick response of liquid crystal display.

Description

Technical field: [0001] The invention belongs to the field of liquid crystal compositions and applications, in particular to a liquid crystal composition and a liquid crystal display element or a liquid crystal display comprising the liquid crystal composition. Background technique: [0002] At present, the application range of liquid crystal compounds is expanding more and more widely, and it can be applied to various types of displays, electro-optic devices, sensors, and the like. There are various types of liquid crystal compounds used in the above-mentioned display fields, among which nematic liquid crystals are most widely used. Nematic liquid crystals have been used in passive TN, STN matrix displays and systems with TFT active matrix. [0003] For the application field of thin film transistor technology (TFT-LCD), although the market has been huge in recent years and the technology has gradually matured, people's requirements for display technology are also constantl...

Claims

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Application Information

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IPC IPC(8): C09K19/44G02F1/1333
Inventor 员国良徐凯李明张芳苗张莉王晓娜
Owner SHIJIAZHUANG CHENGZHI YONGHUA DISPLAY MATERIALS CO LTD
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