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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 significant impact on the interaction between liquid crystal molecules. These effects are very subtle, and no perfect theoretical explanation has been formed so far.

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

Embodiment 1

[0075]

[0076] step one

[0077] Add 189g (0.58mol) 2′,3,5-trifluoro-4″-propyl-1,1′; 4′,1″-terphenyl, 1.7L tetrahydrofuran to a 3L three-necked flask, protect with N2, cool down to - 70°C. Add 256ml (0.64mol) butyllithium dropwise, dropwise time 0.5h, temperature control -65--75°C, after dropwise addition, keep warm for 0.5h, temperature control-65--75°C; dropwise 73.5 g (0.7mol) trimethyl borate, dropwise adding time 0.5h, temperature control -65--75°C, after dropwise addition, keep warm for 1h, temperature control-65--75°C.

[0078] Naturally warm up to -20°C. Pour the feed solution into aqueous hydrochloric acid until the pH is 2, stir for 5 minutes, 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 over anhydrous sodium sulfate.

[0079] Concentrate the solvent, heat and dissolve the product in 600ML of petroleum ether, lower to normal temperature, filter with suc...

Embodiment 2

[0099]

[0100] step 1

[0101] Add 10g (0.03mol) 2′,3,5-trifluoro-4″-propyl-1,1′; 4′,1″-terphenyl, 120ml tetrahydrofuran into a 1L three-necked flask, protect with nitrogen, and cool down to -70 ℃.

[0102] Add 14.4ml (0.036mol) of butyllithium dropwise, keep warm for 30 minutes after adding, add DMF3.3g dropwise, keep warm for 1 hour. Naturally raise the temperature to -40°C, pour the reaction solution into 20g of hydrochloric acid and 100mL of water, separate the layers, extract the aqueous phase with 100mL of ethyl acetate, wash with water 150mL of 2, dry over anhydrous sodium sulfate, and spin dry 15g.

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

Embodiment 3

[0115]

[0116]

[0117] Δε[1KHz,20℃]: 9.2

[0118] Δn[589nm, 20°C]: 0.099

[0119] Cp: ​​72°C

[0120] gamma 1 [25°C]: 53mPa.s

[0121] This liquid crystal composition has moderate Δε, moderate Δn, 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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