Synthesis and Application of Negative Liquid Crystals Containing 2,3,5,6-Tetrafluorophenylene

DAI Xiu-wen; CAI Liang-zhen; WEN Jian-xun

doi:10.3788/YJYXS20132803.0464

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Synthesis and Application of Negative Liquid Crystals Containing 2,3,5,6-Tetrafluorophenylene

Research Letter | 更新时间：2020-08-12

- Synthesis and Application of Negative Liquid Crystals Containing 2,3,5,6-Tetrafluorophenylene
- Chinese Journal of Liquid Crystals and Displays Vol. 28, Issue 3, Pages: 464-466(2013)
- 作者机构：
  
  1. 华东理工大学化学与分子工程学院上海,200237
  2. 上海天问化学有限公司上海,200232
- 作者简介：
- 基金信息：
- DOI：10.3788/YJYXS20132803.0464
  CLC： O753+.2
- Received：25 January 2012，
  
  Revised：27 November 2012，
  
  Published Online：17 December 2012，
  
  Published：15 June 2013
- 稿件说明：
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戴修文, 蔡良珍, 闻建勋. 含有2,3,5,6-四氟亚苯基的负性液晶合成及液晶性研究[J]. 液晶与显示, 2013,28(3): 464-466

DAI Xiu-wen, CAI Liang-zhen, WEN Jian-xun. Synthesis and Application of Negative Liquid Crystals Containing 2,3,5,6-Tetrafluorophenylene[J]. , 2013,28(3): 464-466
戴修文, 蔡良珍, 闻建勋. 含有2,3,5,6-四氟亚苯基的负性液晶合成及液晶性研究[J]. 液晶与显示, 2013,28(3): 464-466 DOI： 10.3788/YJYXS20132803.0464.

DAI Xiu-wen, CAI Liang-zhen, WEN Jian-xun. Synthesis and Application of Negative Liquid Crystals Containing 2,3,5,6-Tetrafluorophenylene[J]. , 2013,28(3): 464-466 DOI： 10.3788/YJYXS20132803.0464.

摘要

设计并合成了两类含氟的负性液晶化合物

通过偏光显微镜和差示扫描量热仪的检测两类液晶化合物都为向列相液晶

且具有很好的液晶性能。全氟二苯乙炔类负性液晶具有很高的清亮点和低的黏度;全氟二苯亚乙基类负性液晶具有很低的黏度和小的双折射率

前者可作为自适应光学系统空间光调制器液晶材料;后者可作为TFT-LCD混合液晶材料中的减黏部分。两个目标化合物分别是通过sonogashira交叉偶联反应和钯催化加氢还原反应得到的。

Abstract

Two kinds of fluorinated negative liquid crystal compounds were synthesized. Two series of nematic liquid crystals were measured by polarised optical microscopy with a heating stage and differential scanning calorimetry and their good mesomorphic properties were observed.For example

the negative liquid crystals introducing 1

4-perfluorophenylene to molecular structure of diphenyl acetylene have high birfringence and low rotational viscosity. The result shows that the liquid crystal compounds with ethylidene bridge could have low birfringence and low viscosity. The first type of compounds could be used in adaptive system like as application in construction of spatial light modulator; the second type of compounds could satisfy the requirements of a low viscosity component in TFT-LCD .Two target compounds were synthesized by sonogashira coupling reaction and then Pd/C catalytic hydrogenation.

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references

Dziaduszek J,Kula P,Dabrowski R,et al.General synthesis method of alkyl-alkoxymultifluorotolanes for negative high birefringence nematic mixtures [J].Liquid Crystals, 2012,39(2):239-247.[2] Ishinabe T,Miyashita T,Uchida T. Wide-viewing-angle polarizer with a large wavelength range [J]. Jpn. J. Appl. Phys., 2002, 41:4553-4558.[3] Oh-e M, Kondo K. Electro-optical characteristics and switching behavior of the in-plane switching mode [J]. Appl. Phys. Lett., 1995, 67:3895-3897.[4] Itoh Y, Seki H, Uchida T,et al. A double-layer electrically controlled birefringence liquid-crystal display with a wide-viewing-angle cone [J]. Jpn. J. Appl.Phys., 1991,30: L1296 - L1299.[5] Wen C H, Wu S T,Dielectric heating effects of dual-frequency liquid crystals [J].Appl. Phys. Lett, 2005, 86(23):231104-231106.[6] 张然,彭增辉,刘永刚,等. 低黏度液晶的合成及性能研究 [J]. 液晶与显示, 2009,24(6): 789-793.[7] 黄锡珉. 液晶显示技术的开发和产业化 [J] . 液晶与显示, 2002,17(6):403-415.[8] Hird M, Gray G W, Toyne K J. The synthesis and transition temperatures of some trans-4-alkylcyclohexylethyl-substituted 2,3-difluoro-biphenyls [J]. Liquid Crystals, 1992, 11(4): 531-546.[9] Reiffenrath V, Krause J,Plach H J, et al. New liquid-crystalline compounds with negative dielectric anisotropy [J]. Liquid Crystals, 1989, 5(1):159-170.

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Related Author

CAO Xiu-ying

ZHAO Min

DAI Xiu-wen

WEN Jian-xun

Dong YUAN

Hui YU

Xu-dong YAN

Related Institution

School of Chemistry Engineering, East China University of Science and Technology, Shanghai 200237, China

Shanghai Tianwen Chemical Corporation

Shanghai Tianwen Chemical Corporation, Shanghai 200232, China

SCNU-TUE Joint Lab of Device Integrated Responsive Materials （DIRM）， National Center for International Research on Green Optoelectronics， South China Normal University

Guangdong Provincial Key Laboratory of Optical Information Materials and Technology， Institute of Electronic Paper Displays， South China Academy of Advanced Optoelectronics， South China Normal University

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