低熔点高Δ<italic style="font-style: italic">n</italic>值双环向列相液晶的合成研究

李潭; 王震; 王国华; 张智勇; 关金涛; 戴志群

doi:10.3788/YJYXS20173211.0861

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低熔点高Δn值双环向列相液晶的合成研究

材料科学 | 更新时间：2020-08-12

- 低熔点高Δn值双环向列相液晶的合成研究
- Synthesis of two-ring nematic phase liquid crystal compounds with low melting point and high Δn value
- 液晶与显示 2017年32卷第11期页码：861-867
- 作者机构：
  
  武汉轻工大学化学与环境工程学院, 湖北武汉 430023
- 作者简介：
  
  [ "李潭(1989-), 男, 安徽六安人, 硕士研究生, 主要从事于光学材料的合成与性能研究。E-mail:15807120464@163.com" ]
  张智勇, E-mail:zzy6211@126.com
- 基金信息：
  
  国家自然科学基金(61378095);国家自然基金(11374067);the National Nutural Science Foundation of China(61378095);National Natural Science Foundation of China(11374067)
- DOI：10.3788/YJYXS20173211.0861
  中图分类号： O621.3
- 收稿日期：2017-03-30，
  
  录用日期：2017-5-30，
  
  纸质出版日期：2017-11-05
- 稿件说明：
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李潭, 王震, 王国华, 等. 低熔点高Δn值双环向列相液晶的合成研究[J]. 液晶与显示, 2017,32(11):861-867.

Tan LI, Zhen WANG, Guo-hua WANG, et al. Synthesis of two-ring nematic phase liquid crystal compounds with low melting point and high Δn value[J]. Chinese journal of liquid crystals and displays, 2017, 32(11): 861-867.
李潭, 王震, 王国华, 等. 低熔点高Δn值双环向列相液晶的合成研究[J]. 液晶与显示, 2017,32(11):861-867. DOI： 10.3788/YJYXS20173211.0861.

Tan LI, Zhen WANG, Guo-hua WANG, et al. Synthesis of two-ring nematic phase liquid crystal compounds with low melting point and high Δn value[J]. Chinese journal of liquid crystals and displays, 2017, 32(11): 861-867. DOI： 10.3788/YJYXS20173211.0861.

摘要

为了获得低熔点、折射率各向异性（Δ

）大的快速响应向列相液晶材料，高Δ

值的液晶混合体系中需要加入熔点在50℃以下、Δ

大于0.35的双环类液晶组分，以使快速响应向列相液晶材料满足室温工作的要求。本文合成了异硫氰基含氟二苯乙炔类液晶化合物；一方面由于在分子苯环侧位引入F原子，减小分子间作用力，使化合物的熔点下降；另一方面在两个苯环间引入三键、分子末端接入异硫氰基极性基团，增加了分子的共轭性，提高了目标化合物的Δ

值。获得了熔点分别为31℃和50℃、Δ

为0.39和0.40，这两种低熔点化合物与目前已具有的毫秒级快速响应向列相液晶化合物混合，可使其熔点低至10℃以下。

Abstract

In order to develop liquid crystal materials with low melting point

high birefringence (Δ

) and fast response

we need to join in double ring type LC compounds with the low melting point under 50℃ and the Δ

value with more than 0.35 in high Δ

values of the liquid crystal mixture system

which can make fast response nematic phase liquid crystal materials meet the requirements of working at room temperature. The liquid crystal compounds of isothiocyanate diphenylacetylene were designed and synthesized in this paper. By adding the isothiocyanate group at the molecular terminal

the birefringence of the liquid crystal increased. At the same time

F atom is introduced at the benzene ring side to reduce the viscosity of the liquid crystals. The results showed that the two target compounds' Δ

value were 0.39 and 0.4

and the melting points were 31℃ and 50℃

respectively

which would decrease the melting point of the present liquid crystals with a few milliseconds in response time as low as 10℃.

关键词

Keywords

references

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低熔点高Δn值双环向列相液晶的合成研究

Synthesis of two-ring nematic phase liquid crystal compounds with low melting point and high Δn value

DOI：10.3788/YJYXS20173211.0861

摘要

Abstract

关键词

Keywords

references