New liquid crystal compound in mesomorphic structure and its synthesis

A compound and member technology, applied in chemical instruments and methods, liquid crystal materials, etc., can solve problems such as narrow phase transition range and complex phase transition temperature, and achieve a wide phase transition range, broad application prospects, and good physical and chemical stability. Effect

Inactive Publication Date: 2006-08-02
YANBIAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] A lot of research work has been done on the two mesogenic liquid crystal compounds containing cholesteryl structure, but most of them present complex liquid crystal states with high phase transition temperature and narrow phase transition range.

Method used

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  • New liquid crystal compound in mesomorphic structure and its synthesis
  • New liquid crystal compound in mesomorphic structure and its synthesis

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Example 1: Cholesterol 6-(4-trans(4-pentylcyclohexyl)phenoxy)hexanoate

[0041] Add 4-trans (4-pentylcyclohexyl) phenol (0.272g), cholesteryl bromohexanoate (0.563g), anhydrous potassium carbonate (0.138g), butanone (50ml) into a round bottom flask ) was heated to reflux for 24 hours, filtered, washed with water, dried, desolvated under reduced pressure, silica gel column chromatography (eluent chloroform: petroleum ether=1: 1), desolvated under reduced pressure to obtain 0.618g of white solid, productive rate 85 %.

[0042] 1 HNMR (CDCl3, 300MHz) 7.12 (d, 2H, J=8.6Hz, Ar- H ), 6.82 (d, 2H, J=8.6Hz, Ar- H ), 5.39 (m, 1H, olefinic), 4.61-4.64 (m, 1H, -OCH-), 3.95 (t, 2H, J=6Hz, -OCH 2 CH 2 -), 2.41(t, 1H, J = 10.5Hz, -H a ), 2.33(t, 2H, J=7.2Hz, -COCH 2 CH 2 -), 2.31-0.87(m, 66H, -CH-, CH 2 -, -CH 3 ), 0.69 (s, 3H, -CH 3 ).

[0043] FTIR (KBr, cm -1 ) 2926 (aliphatic C-H stretching), 1737 (C=O stretching), 1249 and 1172 (C-O stretching).

[0044] MS: m / z 729[...

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Abstract

The present invention discloses one kind of liquid crystal compound in dimesoorphic structure and its preparing process, and the liquid crystal compound is synthesized with corresponding trans-alkylcyclohexyl phenol and cholesterol bromate through reaction in the presence of alkali through heating and stirring inside proper solvent, and contains both cyclohexyl phenol mesoorphic unit ad cholestene base mesoorphic unit. The general expression of the liquid crystal compound is shown. The liquid crystal compound has low and wide-range phase change temperature, simple cholestene phase and high physical and chemical stability, and may be used as liquid crystal material or liquid crystal material component.

Description

Technical field: [0001] The present invention relates to a kind of liquid crystal compound with two mesogenic structures containing cholestenyl group and trans-alkylcyclohexylphenoxy group, and brominated ester of trans-cyclohexylphenol and cholesterol substituted by corresponding alkyl group in the presence of alkali The following is a preparation method for synthesizing a liquid crystal compound with a two-mesogenic structure containing a trans-alkylcyclohexylphenyl mesogenic unit and a cholestenyl mesogenic unit by reacting with an appropriate solvent. Background technique: [0002] Two mesogenic liquid crystal compounds refer to compounds containing two identical mesogenic structural units (symmetric) or different mesogenic structural units (asymmetrical) connected by a flexible spacer in the molecule. Two mesogenic liquid crystal compounds containing cholesteryl structure have attracted extensive attention because they contain chiral mesogenic units and can form cholest...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K19/36
Inventor 尹炳柱张春波丛志奇
Owner YANBIAN UNIV
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