Synthesis and Property of Bent-Core Liquid Crystals with Thiadiazole

LI Shuang-quan; SHEN Dong

doi:10.3788/YJYXS20112604.0421

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Synthesis and Property of Bent-Core Liquid Crystals with Thiadiazole

Material Physics & Chemistry | 更新时间：2020-08-12

- Synthesis and Property of Bent-Core Liquid Crystals with Thiadiazole
- Chinese Journal of Liquid Crystals and Displays Vol. 26, Issue 4, Pages: 421-426(2011)
- 作者机构：
  
  华东理工大学理学院化学物理研究室上海,200237
- 作者简介：
- 基金信息：
- DOI：10.3788/YJYXS20112604.0421
  CLC： O753+.2
- Received：20 December 2011，
  
  Revised：15 February 2011，
  
  Published Online：20 August 2011，
  
  Published：20 August 2011
- 稿件说明：
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李双全, 沈冬. 噻二唑类弯曲型液晶分子的合成和性能研究[J]. 液晶与显示, 2011,26(4): 421-426

LI Shuang-quan, SHEN Dong. Synthesis and Property of Bent-Core Liquid Crystals with Thiadiazole[J]. , 2011,26(4): 421-426
李双全, 沈冬. 噻二唑类弯曲型液晶分子的合成和性能研究[J]. 液晶与显示, 2011,26(4): 421-426 DOI： 10.3788/YJYXS20112604.0421.

LI Shuang-quan, SHEN Dong. Synthesis and Property of Bent-Core Liquid Crystals with Thiadiazole[J]. , 2011,26(4): 421-426 DOI： 10.3788/YJYXS20112604.0421.

摘要

合成了两个系列以1

4-噻二唑为中心基团的弯曲型分子

结合偏光显微熔点仪(POM)观察和差示量热扫描法(DSC)研究了它们的液晶性能。研究发现

这两类弯曲型分子都会出现N相。其中

对称型五环酯类噻二唑弯曲型分子的熔点都较高

清亮点均超过360 ℃;含烯丙基非对称噻二唑类弯曲型分子熔点和清亮点温度大幅度降低

N相的温区较宽

以庚基为端基链的弯曲型分子出现N相的温度区间超过120 ℃。

Abstract

Two series of bent-core liquid crystals with 1

4- thiadiazole as the center unit were synthesized

their liquid crystalline properties were studied by POM and DSC. It is found that both of these two serie thiadiazole compounds exhibite N phase. Among them

the symmetric five benzene ring thiadiazole ester compounds have rather high melting points

the clearing temperatures are more than 360 ℃. The melting points and clearing temperatures of the asymmetric thiadiazole molecules with allyl terminal chains are significantly reduced

and the bent-core molecule with heptyl as terminal groups shows N phase at a very wide temperature range (>120 ℃).

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references

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