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Supermolecular disc liquid-crystal compounds and process for preparing same

A technology of discotic liquid crystals and compounds, applied in the field of liquid crystal compounds and their preparation, can solve problems such as the limitation of application range, and achieve the effect of wide application

Inactive Publication Date: 2005-11-23
SHANGHAI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, the molecular structures of discotic liquid crystal compounds reported so far are mainly compounds with symmetrical molecular structures, and their liquid crystal properties are affected by temperature conditions. They can only have columnar structure properties in a certain temperature range, and their applications limited range

Method used

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  • Supermolecular disc liquid-crystal compounds and process for preparing same
  • Supermolecular disc liquid-crystal compounds and process for preparing same
  • Supermolecular disc liquid-crystal compounds and process for preparing same

Examples

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Embodiment Construction

[0022] Taking the carboxyl chain length n=4 as an example, the synthesis method of one of the discotic liquid crystal compounds is introduced.

[0023] 1. Synthesis of 2-pentyloxy-4-iodoanisole from 2-methoxy-5-iodophenol: get 15 grams of compound 2-methoxy-5-iodophenol and dissolve it in 150 milliliters of absolute ethanol In a 250 ml three-necked flask, after adding 16.5 g of potassium carbonate, gradually add 10 g of n-bromopentane dropwise. Heat up to 78°C and reflux for 24 hours. After the reaction was terminated, it was filtered hot, and a large amount of crystals were precipitated after the filtrate was cooled, and 14.6 grams of white needle-like crystals of 2-pentyloxy-4-iodoanisole were obtained by recrystallization. Yield 76%, melting point 59.4-59.7°C. Infrared IR: 2869cm -1 , 1578cm -1 , 1502cm -1 , 1218cm -1 , 1135cm -1 , 857cm -1 , 796cm -1 . NMR 1 H-NMR (CDCl 3 )δppm: 7.09(dd, 1H), 7.04(dd, 1H), 6.43(d, 1H), 3.94(t, 2H), 3.83(s, 3H), 1.71(m, 2H), 1.3...

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Abstract

The invention discloses a supermolecular disc liquid-crystal compounds and process for preparation, wherein the compound has the structural formula disclosed in the specification, wherein n=1-6, its preparation process comprises, introducing alkyl into 2-methoxyl-5-iodophenol, carrying out Ullmann coupling, free radical coupling and demethylating reaction, constructing triphenylene precursor, then introducing lateral chain with ester group as the end group, and hydrolyzing the ester group into acids.

Description

technical field [0001] The invention relates to a liquid crystal compound and a preparation method thereof, in particular to a supramolecular discotic liquid crystal compound and a preparation method thereof. Background technique [0002] In the past two decades, liquid crystal materials have been widely used in industry and people's daily life due to their unique photoelectric properties. As a new type of display material, it not only has the unique advantages of low power consumption, low driving voltage and display in a bright environment, but also has flexible size, flat, curved, clear display, wide application range, and low cost. features. In recent years, with the breakthrough of thin film transistor TFT liquid crystal display technology, the application of flat liquid crystal display is more and more extensive, and there will be a tendency to replace cathode picture tube CRT display. The geometric structure of the liquid crystal molecules found at present is usuall...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K19/32
Inventor 万文王朋玉陈莉陈华
Owner SHANGHAI UNIV
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