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Dicyclohexylalkyl ether terminal olefines liquid crystal compound and preparation method thereof

A bicyclohexyl alkyl ether and liquid crystal compound technology, which is applied in the field of liquid crystal compound preparation and can solve problems such as poor compatibility at low temperature

Active Publication Date: 2014-09-03
YANTAI DERUN LIQUID CRYSTAL MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is still insufficient to meet the low-temperature fast response. At the same time, the low-temperature compatibility is also poor, that is, there are not many liquid crystal materials with relatively balanced properties. Therefore, it still cannot meet or adapt to the new requirements of liquid crystal materials for display devices!

Method used

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  • Dicyclohexylalkyl ether terminal olefines liquid crystal compound and preparation method thereof
  • Dicyclohexylalkyl ether terminal olefines liquid crystal compound and preparation method thereof
  • Dicyclohexylalkyl ether terminal olefines liquid crystal compound and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0214] Taking the preparation of trans, trans-4'-methoxybicyclohexylethylene (I-1) liquid crystal compound as an example, the preparation method of bicyclohexyl alkyl ether terminated vinyl liquid crystal material is described in detail:

[0215] Step 1: Synthesis of 4′-trans-hydroxybicyclohexyl glycol monopropanone (1):

[0216] Add 24.8g (0.65mol) of sodium borohydride, 1500ml of dry tetrahydrofuran, and 500ml of ethanol into the three-neck flask, stir to dissolve, and place in a water bath; add 518g of ethylene glycol monoprotected dicyclohexyldiketone (MCMK) through a constant pressure dropping funnel The solution dissolved in 1000ml of toluene was added dropwise for about 1.5 hours, and the temperature was controlled at 20-30°C; after the addition was complete, it was kept for another 2h; 500mL of saturated ammonium chloride solution was added for acidic hydrolysis. Stir for 0.5h, pour into a 5L separatory funnel for liquid separation, extract the aqueous phase twice with...

Embodiment 2

[0230] The preparation method of trans, trans-4'-ethoxybicyclohexylethylene (I-2) liquid crystal compound:

[0231] The preparation process was the same as in Example 1, except that the raw material of methyl iodide in step 2 was replaced by diethyl sulfate, and other steps were similar to prepare the target product (I-2). The experimental results are as follows: Phase change of liquid crystal compound: C10.7°C N 27.1°CI.

Embodiment 3

[0233] The preparation method of trans, trans-4'-propoxybicyclohexylethylene (I-3) liquid crystal compound:

[0234]The preparation process was the same as in Example 1, except that the raw material of methyl iodide in step 2 was replaced by bromopropane, and other steps were similar to prepare the target product (I-3). The experimental results are as follows: Phase change of liquid crystal compound: C15.7°C N 33.6°CI.

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Abstract

The invention discloses a bicyclohexyl alkyl ether terminated alkene liquid crystal compound and a preparation method thereof. The bicyclohexyl alkyl ether terminated alkene liquid crystal compound mainly includes trans, trans-4'-alkoxybicyclohexyl Ethylene liquid crystal compound, trans-4'-alkoxy bicyclohexyl-2-propene liquid crystal compound and trans, trans-4'-alkoxy bicyclohexyl-1-butene liquid crystal compound, the above three liquid crystal compounds pass Prepared by different methods, the three liquid crystal compounds prepared according to the method of the present invention have lower viscosity, especially at low temperature, the mutual solubility between liquid crystal monomers is good, and the characteristics of larger K33 / K11 can adapt to mobile Terminals, tablet computers, touch screens and other new displays require fast response to liquid crystal materials.

Description

technical field [0001] The invention relates to a bicyclohexyl alkyl ether terminated vinyl liquid crystal compound and a preparation method of the compound, belonging to the technical field of liquid crystal compound preparation. Background technique [0002] Thin film transistor liquid crystal display (TFT-LCD) is the most important type of liquid crystal display (LCD). Its output value and influence play a pivotal role in the LCD family and are widely used in TVs, notebook computers, monitors, and mobile phones. and other aspects. In the past one or two years, with the rise of 3D technology and the improvement of low-carbon energy-saving awareness, especially the emergence of mobile terminals, tablet computers, touch screens, etc., people have put forward new requirements for low temperature, fast response, and energy saving of liquid crystal displays (LCDs). . [0003] Liquid crystal material is one of several major materials constituting a liquid crystal display (...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C43/192C07C43/188C07C41/30C09K19/44C09K19/30
Inventor 刘鑫勤黄波李强姜东全张然
Owner YANTAI DERUN LIQUID CRYSTAL MATERIALS