Application of a liquid crystal compound as a high birefringence liquid crystal material or in improving the birefringence of a liquid crystal host

A technology of liquid crystal compounds and high birefringence, applied in liquid crystal materials, chemical instruments and methods, optics, etc., can solve the problems of limited application performance, dichroic dye structures and varieties, etc. Novel, the effect of increasing birefringence

Inactive Publication Date: 2016-03-09
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are many structures and varieties of dichroic dyes studied, but there are not many with good application performance and practical significance.

Method used

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  • Application of a liquid crystal compound as a high birefringence liquid crystal material or in improving the birefringence of a liquid crystal host
  • Application of a liquid crystal compound as a high birefringence liquid crystal material or in improving the birefringence of a liquid crystal host
  • Application of a liquid crystal compound as a high birefringence liquid crystal material or in improving the birefringence of a liquid crystal host

Examples

Experimental program
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Effect test

Embodiment 1

[0031] (1) Synthesis of 4-bromoacenaphthylquinone (compound 1)

[0032]

[0033] Add 10.02g (55mmol) of acenaphthoquinone into a 250mL three-neck flask, then measure 12mL of liquid bromine with a syringe and add it into it. Saturated NaOH solution absorbs the tail gas, slowly heats to 65°C, and reacts for two hours under stirring. The reaction was stopped, the mixture was cooled to room temperature, and an appropriate amount of saturated Na 2 SO 3 The solution was freed of excess bromine and hydrogen bromide until the liquid was colorless. Suction filtration and washing until the filtrate is neutral. The crude product was recrystallized with glacial acetic acid after drying to obtain 12.34 g of a yellow solid with a yield of 86%. Melting point: 236.0-236.8°C.

[0034] (2) Synthesis of 3-bromo-8-thia-7,9-diaza-cyclopenta[a]acenaphthene 8,8-dioxide (compound 2)

[0035]

[0036] Add 11.49g (45mmol) of 4-bromoacenaphthenequinone, 6.48g (67.5mmol) of sulfamide and 100mL...

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Abstract

The invention relates to application of a liquid crystal compound as a high-birefringence liquid crystal material or to improve birefringence of a liquid crystal main body, and concretely, the liquid crystal compound is singly used as the high-birefringence liquid crystal material or is added into the liquid crystal main body for improving the birefringence of the liquid crystal main body. The liquid crystal compound has the chemical molecular structure shown in the specification. The liquid crystal compound possesses a liquid crystalline phase, has the birefringence delta n up to 0.3213, and can be singly used as the birefringence liquid crystal material. Additionally, the liquid crystal compound can be used as a liquid crystal addition composition and is added in to the liquid crystal main body for improving the birefringence of the liquid crystal main body.

Description

technical field [0001] The invention relates to the application of a liquid crystal compound as a high birefringence liquid crystal material or in improving the birefringence of a liquid crystal body, belonging to the field of liquid crystal materials. Background technique [0002] Liquid crystal not only shows fluidity of liquid, but also shows anisotropy of crystal, not only can be used as display screen material, but liquid crystal molecules with longer molecular conjugated system also have high birefringence. [0003] Along with the process of global informatization and digitization, the electronic information industry is ushering in a wave of tabletization, and a revolution in the field of display is taking place. The popular cathode ray tube display is gradually being replaced by the flat panel display represented by the thin film transistor liquid crystal display device, and the flat panel display technology and products have already occupied a dominant position in th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K19/32G02F1/13
Inventor 李晓莲刘亚王召芬汪五根
Owner DALIAN UNIV OF TECH
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