芳环上氟原子对手性液晶分子扭曲力的影响

李辉; 杜渭松; 李建; 邓登; 于倩倩; 王艳

doi:10.3788/YJYXS20112601.0005

您当前的位置：

首页 >

文章列表页 >

芳环上氟原子对手性液晶分子扭曲力的影响

材料物理和化学 | 更新时间：2020-08-12

- 芳环上氟原子对手性液晶分子扭曲力的影响
- Influence of Fluorine Atom Attached to Aromatic Ring on Heliex Twisting Power of Chiral Liqiud Crystals
- 液晶与显示 2011年26卷第1期页码：5-8
- 作者机构：
  
  1. 西安近代化学研究所,陕西西安,710065
  2. 西安北方惠安化学工业公司,陕西西安,710302
  3. 宝鸡文理学院化学系,陕西宝鸡,721007
- 作者简介：
- 基金信息：
  
  国防基础科研计划资助项目(No.C0920060318)()
- DOI：10.3788/YJYXS20112601.0005
  中图分类号： O753+.2
- 收稿日期：2010-06-04，
  
  修回日期：2010-07-12，
  
  纸质出版日期：2011-02-20
- 稿件说明：
移动端阅览
李辉, 杜渭松, 李建, 邓登, 于倩倩, 王艳. 芳环上氟原子对手性液晶分子扭曲力的影响[J]. 液晶与显示, 2011,26(1): 5-8

LI Hui, DU Wei-song, LI Jian, DENG Deng, YU Qian-qian, WANG Yan. Influence of Fluorine Atom Attached to Aromatic Ring on Heliex Twisting Power of Chiral Liqiud Crystals[J]. 液晶与显示, 2011,26(1): 5-8
李辉, 杜渭松, 李建, 邓登, 于倩倩, 王艳. 芳环上氟原子对手性液晶分子扭曲力的影响[J]. 液晶与显示, 2011,26(1): 5-8 DOI： 10.3788/YJYXS20112601.0005.

LI Hui, DU Wei-song, LI Jian, DENG Deng, YU Qian-qian, WANG Yan. Influence of Fluorine Atom Attached to Aromatic Ring on Heliex Twisting Power of Chiral Liqiud Crystals[J]. 液晶与显示, 2011,26(1): 5-8 DOI： 10.3788/YJYXS20112601.0005.

摘要

通过Mitsunobu反应合成了一系列手性液晶

收率63%~71%

并通过

H NMR、MS、IR对其结构进行了表征。结合DSC和POM研究了目标化合物的介晶性。利用Canos wedge法研究了目标化合物的扭曲力

发现随着手性中心邻近芳环上氟原子数的增多

手性液晶分子的扭曲力显著增大。实验结果表明

氟原子的引入影响了碳氧单键的自由旋转

导致手性液晶分子具有较少构象异构体

从而表现出大的扭曲力。

Abstract

A series of chiral liquid crystals were synthesized through Mitsunobu reaction and the yields varied from 63% to 71%. The compounds were characterized by IR

H NMR

MS. The mesomorphic property of objective compounds was investigated by DSC and POM. The helical twisting power (HTP) was determined by Canos wedge method. It was found that HTP increased with the increase of the number of Fluorine atom attached to aromatic ring.The inducing of fluorine atom to aromatic ring influence the rotation of CO bond

then chiral moleculer has small number of conformation and exhibits high HTP.

关键词

Keywords

references

Finkenzeller U, Plach H J. Performance of chiral dopants in nematic mixtures [J]. Mol. Cryst. Liq. Cryst. Lett., 1988, 6(3):87-93.[2] 李辉,杜渭松,李建.显示液晶用手性添加剂材料进展 [J]. 液晶与显示, 29,24(1):26-33.[3] Lee H J, Jin Z X, Aleshin A N , et al. Dispersion and current-voltage characteristics of helical polyacetylene single fibers [J]. J. Am. Chem. Soc., 24,126(51):16722-16723.[4] Peelers E, Christiaans M P T, Janssen R A J, et al. Circularly polarized electroluminescence from a polymer light-emitting diode [J]. J. Am. Chem. Soc.,1997, 119(41):999-991.[5] Li W, Wang H L. Oligomer-assisted synthesis of chiral polyaniline nanofibers. [J]. J. Am. Chem. Soc.,24,126(8):2278-2279.[6] Gray G W, Mcdonnell D W. Optically active cynobiphenyl compounds and liquid crystal materials and devices containing them: GB,1556994 .1979-12-5 .[7] Januszko A, Kaszynski P, Drzewinski W. Ring effect on helical twisting power of optically active mesogenic esters derived from benzene, bicyclo octane and p-carborane carboxylic acids [J]. J. Mater. Chem., 26, 16(5):452-461.[8] Fukuda K, Suzuki H, Tokita M, et al. New optically active imine dopants derived from (R)-(+)-1-(1-naphthyl)ethylamine: Relation between their large helical twisting power and internal rotation potential profiles [J]. Theochem, 27, 821(1):95-1 .[9] Akagi K, Guo S X, Mori T,et al.Synthesis of helical polyacetylene in chiral nematic liquid crystals using crown ether type binaphthyl derivatives as chiral dopants [J].J. Am. Chem. Soc., 25,127(42):14647-14654.[1] 原小涛,曹晖,杨洲,等.一种手征向列相液晶的螺旋性能研究 [J]. 液晶与显示, 28,23(4):44-48.[11] Detlef P. Chiral 2,6-difluorobenzene derivatives:DE,432295 . 1994-1-27.

浏览量

下载量

CSCD

文章被引用时，请邮件提醒。

提交

工具集

关联资源

3D打印手性液晶智能材料研究进展