Liquid crystal compounds containing benzo1,3-dioxolane and difluoromethyleneoxy bridges

A compound and liquid crystal technology, applied in organic chemistry, liquid crystal materials, chemical instruments and methods, etc.

Active Publication Date: 2015-07-29
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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  • Liquid crystal compounds containing benzo1,3-dioxolane and difluoromethyleneoxy bridges
  • Liquid crystal compounds containing benzo1,3-dioxolane and difluoromethyleneoxy bridges
  • Liquid crystal compounds containing benzo1,3-dioxolane and difluoromethyleneoxy bridges

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 3~50

[0121] With reference to the method of Example 1 and 2, only the reactant substituent is replaced according to the corresponding product, and the compound shown in the following formula I is obtained:

[0122]

[0123]

[0124]

[0125]

[0126]

[0127]

Embodiment 51

[0129] With embodiment 2 gained and embodiment 5 gained and other liquid crystal compounds of the following structural formula, mixed according to the following weight ratio to obtain a liquid crystal mixture:

[0130]

[0131]

[0132] The physical properties and liquid crystal performance test results of this liquid crystal mixture are as follows:

[0133] CP=103℃

[0134] Δn=0.1000

[0135] Δε=6.2;

[0136] And add embodiment 2 gained and embodiment 5 gained Previously, the performance test results of the liquid crystal mixture with the above mass ratio are as follows:

[0137] CP=93℃,

[0138] Δn=0.087,

[0139] Δε=4.4.

[0140] It can be seen from the above that adding the compound of formula I to the liquid crystal mixture can improve the performance of the liquid crystal mixture, significantly increase the dielectric anisotropy Δε and optical anisotropy Δn, and broaden the nematic phase temperature range of the liquid crystal mixture.

Embodiment 52

[0142] With embodiment 50 gained and embodiment 5 gained and other liquid crystal compounds of the following structural formula, mixed according to the following weight ratio to obtain a liquid crystal mixture:

[0143]

[0144]

[0145] The physical properties of the mixture and liquid crystal performance test results are as follows:

[0146] CP=93℃

[0147] Δn=0.089

[0148] Δε=6.5.

[0149] And add embodiment 50 gained and embodiment 5 gained Previously, the performance test results of the liquid crystal mixture with the above mass ratio are as follows:

[0150] CP=83℃,

[0151] Δn=0.075,

[0152] Δε=4.5.

[0153] It can be seen from the above that the compound of formula I can significantly improve the performance of the liquid crystal mixture, significantly improve the dielectric anisotropy Δε and optical anisotropy Δn of the mixture, increase the birefringence, and improve the orientation of the liquid crystal mixture. phase range.

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Abstract

The invention discloses a liquid crystal compound containing a benzo-1, 3-dioxolane and difluoro-methylenedioxy bridge (-CF2O-) and a preparation method and application of the liquid crystal compound. The structural general formula of the compound is represented by the formula I, and the compound has a stable structure and a wide liquid crystal state temperature range, and is good in low-temperature intersolubility and high in positive dielectric anisotropy Delta Epsilon. When being applied to an optical element, the compound can realize low threshold voltage and low rotary viscosity Gamma, can improve the performance of a liquid crystal composition material and a display, and has an important significance for realizing the fast response of the display. A liquid crystal composition containing the compound disclosed by the invention can be used for preparing a liquid crystal display with low driving voltage, a wide temperature range and a high response speed.

Description

technical field [0001] The invention belongs to the field of liquid crystal compounds and applications, and relates to a compound containing benzo 1,3-dioxolane and difluoromethyleneoxy bridge (-CF 2 O-) liquid crystal compound and its preparation method and application. Background technique [0002] 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] As a liquid crystal material for display, it has been greatly developed, and a large number of liquid crystal compounds have appeared. From biphenylnitrile, esters...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D317/46C07D407/04C09K19/44C09K19/34
Inventor 华瑞茂夏治国高红茹员国良韩耀华
Owner BEIJING CHENGZHI YONGHUA DISPLAY TECHNOLOGY CO LTD
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