Nematic liquid crystal compound and applications thereof

A liquid crystal compound and compound structure technology, applied in liquid crystal materials, chemical instruments and methods, optics, etc., can solve the problems of low voltage, fast TFT-LCD response, and low charge retention, and achieve stable properties and mutual solubility. Good, large dielectric anisotropy effect

Active Publication Date: 2013-01-02
BEIJING BAYI SPACE LCD MATERIALS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the limitations of the liquid crystal material itself, TFT-LCD still has many defects such as insufficient response, insufficient voltage, and insufficient charge retention rate.

Method used

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  • Nematic liquid crystal compound and applications thereof
  • Nematic liquid crystal compound and applications thereof
  • Nematic liquid crystal compound and applications thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Synthesis of 5-(4-propylbicyclohexyl)acetyl-1,2,3-trifluorobenzene

[0040]

[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 3,4,5-trifluorobenzonitrile and 300 ml of toluene at 70°C, and reflux for 4 hours after the dropwise addition. Add 500 ml of 2M hydrochloric acid to reflux for 2 hours, separate the liquid, wash with water until neutral, evaporate the solvent, and recrystallize with 4 times absolute ethanol to obtain 106.0 g of A1 as a white solid. The gas phase purity is 99.0%.

[0042] Synthesis of 1-(4-propylbicyclohexyl)-2-(3,4,5-trifluorophenyl)propane

[0043]

[0044] Add 0.2 mole of methylt...

Embodiment 2

[0049] 1-(4-Propylcyclohexyl)-2-(4-bromophenyl)propane (B3).

[0050] Synthesis of 1-(4-propylcyclohexyl)-2-(3’,4’,5’-trifluorobiphenyl)propane

[0051]

[0052]Add 0.1 mol of 1-(4-propylcyclohexyl)-2-(4-bromophenyl)propane (B3), 0.12 mol of 3,4,5-trifluorophenylboronic acid, 50 ml of anhydrous Ethanol, 100 ml of toluene and 100 ml of water, start stirring, add 0.24 moles of anhydrous sodium carbonate, heat to 60 ° C and then add 0.05 mmol of tetrakis (triphenylphosphine) palladium, heat and reflux for four hours, cool to 50 ° C, Add 0.4L of toluene and stir for 5 minutes, let stand for 10 minutes, and separate the liquids. The upper layer was the product phase, which was washed three times with 0.2L×3 water, and the solvent was distilled off to obtain a light yellow solid, which was recrystallized twice from absolute ethanol to obtain a white crystal (C1), with a quantity of 32 grams and a gas phase purity of 99.5%.

[0053] Mass spectrometry: 374 (molecular ion peak); ...

Embodiment 3

[0056] Application of liquid crystal compounds containing isopropane bridges in TN, IPS, FFS, ADS-TFT modes:

[0057] The liquid crystal composition was prepared in parts by weight shown in Table 1, and the performance parameters of the liquid crystal composition were shown in Table 1.

[0058] Table 1, parts by weight and performance parameters of each component in the liquid crystal composition

[0059]

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PUM

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Abstract

The present invention relates to a nematic liquid crystal compound and applications thereof. The structure of the liquid crystal compound contains an isopropane bridge bond. The nematic liquid crystal compound of the present invention has characteristics of stable structure, stable properties, good intersolubility, low viscosity, and large dielectric anisotropy, and can be applied in a TFT liquid crystal mode.

Description

technical field [0001] The invention relates to the field of liquid crystals, in particular to a liquid crystal compound containing an isopropane bridge structure and an application thereof. 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 successfu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K19/30G02F1/13
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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