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Liquid crystal compound containing indan and difluoro methylenedioxy bridge, as well as preparation method and application thereof

A kind of technology of compound, alkoxy, applied in the field of liquid crystal compound containing indane and difluoromethyleneoxy bridge and its preparation

Active Publication Date: 2015-06-17
SHIJIAZHUANG CHENGZHI YONGHUA DISPLAY MATERIALS 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 compound containing indan and difluoro methylenedioxy bridge, as well as preparation method and application thereof
  • Liquid crystal compound containing indan and difluoro methylenedioxy bridge, as well as preparation method and application thereof
  • Liquid crystal compound containing indan and difluoro methylenedioxy bridge, as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0092]

[0093] step 1

[0094] Add 19.2g of magnesium chips and 200ml of tetrahydrofuran into a 250ml three-necked flask, fill with nitrogen to replace the air, add dropwise 5ml of a solution made of 98.4g of bromopropane and 200ml of tetrahydrofuran, heat to 66°C to initiate the Grignard reaction, and add the rest in 30 minutes Bromopropane solution to get Grignard reagent C 3 h 7 MgBr, add 104g 2-indanone and Grignard reagent dropwise after 30 minutes, the reaction is exothermic, add it in 30 minutes, react for 2 hours after the addition, pour 1000ml ice water with 80ml hydrochloric acid (pH value is 1-3) After the reaction is completed, the organic phase is collected, the water phase is extracted once with toluene, the combined organic phases are washed with water, and after the solvent is evaporated, 300 ml of toluene solvent and 1 g of catalyst p-toluenesulfonic acid are added to the obtained organic phase for catalytic dehydration at 110 ° C. Reaction, the water ...

Embodiment 2

[0117]

[0118] step 1

[0119] Add 14.4g of magnesium chips and 200ml of tetrahydrofuran into a 250ml three-necked flask, fill with nitrogen to replace the air, add dropwise 5ml of a solution made of 162g of 3′,5′-difluoro-4-bromobiphenyl and 240ml of tetrahydrofuran, and heat to 66°C to trigger Grignard reaction, add the remaining solution in 30 minutes to obtain 3', 5'-difluoro-4-bromobiphenyl Grignard reagent, after 30 minutes, add 78g of 2-indanone dropwise at 66°C for addition reaction, the reaction Heat, add in 30 minutes, react for 2 hours after adding, pour into 600ml ice water (pH value 1-3) with 60ml hydrochloric acid to carry out hydrolysis reaction, separate the organic phase, extract the water phase once with toluene, and combine the organic phase Wash the phase with water, distill off the solvent, add 300ml of toluene and 1g of catalyst p-toluenesulfonic acid to carry out catalytic dehydration reaction at 110°C, divide the water until there is no water, dis...

Embodiment 3

[0138] Embodiment 3, preparation liquid crystal mixture a

[0139] In component B, add embodiment 1 and prepare the compound shown in gained formula I (that is, component A) mixing to obtain the liquid crystal mixture a provided by the present invention;

[0140] Among them, component B and The weight ratio is 100:10;

[0141] Part B consists of the following components:

[0142] The structural formula of each component parts by weight

[0143]

[0144]

[0145] Δn[589nm, 25°C]: 0.100

[0146] Δε[1KHz, 25°C]: 10.6

[0147] Cp: ​​95°C

[0148] gamma 1 [25°C]: 130mPa.s.

[0149] The performance parameter of this liquid crystal mixture a is as follows:

[0150] Δn[589nm, 25°C]: 0.1037

[0151] Δε[1KHz, 25°C]: 11.4

[0152] Cp: ​​85°C

[0153] gamma 1 [25°C]: 122.5mPa.s.

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PUM

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Abstract

The invention discloses a liquid crystal compound containing indan and difluoro methylenedioxy bridge, as well as a preparation method and an application thereof. The structural formula of the compound is shown in formula I as shown in the specification. The compound has good thermal stability and stability to ultraviolet light and larger positive dielectric anisotropy delta epsilon; when the compound is used in optical devices, lower threshold voltage can be realized, and lower rotary viscosity gamma1 is achieved, and the compound has significance to the rapid response of a display, so that the compound is suitable for preparing a liquid crystal mixture. The liquid crystal mixture containing the liquid crystal monomer can be applied to various displays, in particular a TN-TFT (Twisted Nematic-Thin Film Transistor) and an STN (Super Twisted Nematic) display, and can also be used in IPS and VA displays.

Description

technical field [0001] The invention belongs to the field of liquid crystal compounds and applications, and relates to a liquid crystal compound containing indane and a difluoromethyleneoxy bridge, a preparation method and application thereof. 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, oxygen-containing heterocyc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C43/225C07C41/16C09K19/44C09K19/32G02F1/1333
Inventor 员国良夏治国梁志安华瑞茂王奎温刚
Owner SHIJIAZHUANG CHENGZHI YONGHUA DISPLAY MATERIALS CO LTD
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