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Cyclohexane derivatives, preparation method thereof and applications thereof

A kind of technology of mixture and compound, applied in the field of cyclohexane derivative and preparation thereof

Active Publication Date: 2015-04-29
BEIJING CHENGZHI YONGHUA DISPLAY TECHNOLOGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But so far, no single liquid crystal monomer has been used alone in liquid crystal displays without being combined with other compounds to meet the performance requirements.

Method used

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  • Cyclohexane derivatives, preparation method thereof and applications thereof
  • Cyclohexane derivatives, preparation method thereof and applications thereof
  • Cyclohexane derivatives, preparation method thereof and applications thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0149] Compound of Example 1 Synthesis of (I-17)

[0150]

[0151] Step 1 (Ⅰ-17-a) Synthesis

[0152] Add 56.64g (0.24mol) 1,4-dibromobenzene (reactant) and 400ml dry tetrahydrofuran (solvent) to a 1L three-necked flask. ) n-butyllithium (reactant), keep it warm for 1 hour after dropping, at the same temperature, add dropwise a mixed solution of 0.216mol 3-methylcyclohexanone (reactant) and 50ml dry tetrahydrofuran (solvent), and stir for 30 minutes after dropping , naturally warming up, 200ml of saturated ammonium chloride aqueous solution was added dropwise at about 0°C (to adjust the pH value), the liquid was separated, the aqueous phase was extracted with 200ml of ethyl acetate (solvent), the organic phase was washed with water, and spin-dried to obtain 50g (GC: 89% ) liquid, add 50g of the product obtained above, 500ml of dry dichloromethane (solvent) into another 1L three-necked bottle, under nitrogen protection, cool down to -25°C, add dropwise 63.3ml (0.397mol,...

Embodiment 2

[0169] Synthesis of (Ⅰ-18)

[0170]

[0171] step 1 Synthesis of (I-18-a)

[0172] Add 75g (0.24mol) of 1,4-dibromobiphenyl (reactant) and 400ml of dry tetrahydrofuran (solvent) into a 1L three-necked flask. N) n-butyllithium (reactant), keep warm for 1 hour after dropping, at the same temperature, add dropwise a mixed solution of 0.216mol 3-methylcyclohexanone (reactant) and 50ml dry tetrahydrofuran (solvent), and stir for 30 Minutes, heat up naturally, add 200ml of saturated ammonium chloride aqueous solution dropwise at about 0°C (adjust the pH value), separate the liquid, extract the aqueous phase with 200ml of ethyl acetate (solvent), wash the organic phase with water, and spin dry to obtain 70g (GC: 89 %) liquid, add 70g of the product obtained above, 500ml of dry dichloromethane (solvent) to another 1L three-necked bottle, under nitrogen protection, cool down to -25°C, add dropwise 63.3ml (0.397mol, 2.2eq) triethyl Silicon hydrogen (reactant), after dropping, a...

Embodiment 3

[0194] Embodiment 3, preparation liquid crystal mixture a

[0195] Mix the compounds uniformly according to the following mass percentages to obtain liquid crystal mixture a:

[0196]

[0197]

[0198] The performance test result of this liquid crystal mixture is as follows:

[0199] Cp: ​​88°C

[0200] Δn: 0.105

[0201] Δε: 7.3

[0202] gamma 1 :66;

[0203] It can be known from the above that the composition has a high clearing point, appropriate optical anisotropy, low rotational viscosity and fast response speed, and can be suitable for liquid crystal displays.

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Abstract

The invention discloses liquid crystal compounds containing cyclohexane derivatives, a preparation method thereof and applications thereof. The general formula of the compounds is shown as the formula I. The compounds are stable in structure, and have wide liquid crystalline state temperature ranges, good low-temperature intersolubility and large dielectric anisotropy delta epsilon. When being used for optical devices, the compounds are capable of achieving low threshold voltage and low rotary viscosity [gamma]1, and improving liquid crystal composite materials and display performances, and have important significance for achieving rapid response of displays. The liquid crystal composite materials containing the compounds can be used for preparing liquid crystal displays having a low driving voltage, a wide temperature range and a rapid response speed.

Description

technical field [0001] The invention belongs to the field of liquid crystal compound synthesis and application, and relates to a cyclohexane derivative and its preparation method and application. Background technique [0002] Liquid crystal displays using liquid crystal compositions are widely used in displays such as instruments, computers, and televisions. For the field of liquid crystal display technology, although the market has become very large in recent years and the technology has gradually matured, people's requirements for display technology are also constantly improving, especially in terms of achieving fast response and reducing driving voltage to reduce power consumption. As one of the important optoelectronic materials of liquid crystal display, liquid crystal material plays an important role in improving the performance of liquid crystal display. [0003] Liquid crystal display elements are divided into the following modes according to the display mode: twist...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K19/30C09K19/44G02F1/1333
Inventor 韩耀华尚洪勇夏治国赵利峰谷琪华瑞茂
Owner BEIJING CHENGZHI YONGHUA DISPLAY TECHNOLOGY CO LTD
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