Preparation and properties of oxymethylene-bridged negative liquid crystal

SU Xin-yan; FAN Cheng-shi; LI Ji-xiang; LUO Zhong-lin

doi:10.3788/YJYXS20163104.0353

您当前的位置：

首页 >

文章列表页 >

Preparation and properties of oxymethylene-bridged negative liquid crystal

Material and Device | 更新时间：2020-08-12

- Preparation and properties of oxymethylene-bridged negative liquid crystal
- Chinese Journal of Liquid Crystals and Displays Vol. 31, Issue 4, Pages: 353-357(2016)
- 作者机构：
  
  1. 上海大学材料科学与工程学院高分子材料系上海,200444
  2. 友邦(江苏)聚氨酯新材料有限公司, 江苏江阴,214446
- 作者简介：
- 基金信息：
  
  Supported by National Natural Science Foundation of China(No. 51003013)
- DOI：10.3788/YJYXS20163104.0353
  CLC： O753+.2
- Received：19 November 2015，
  
  Revised：17 December 2015，
  
  Published：05 April 2016
- 稿件说明：
移动端阅览
苏新艳, 范程士, 李继响等. 含亚甲氧基桥键负性单体液晶的制备及性能研究[J]. 液晶与显示, 2016,31(4): 353-357

SU Xin-yan, FAN Cheng-shi, LI Ji-xiang etc. Preparation and properties of oxymethylene-bridged negative liquid crystal[J]. , 2016,31(4): 353-357
苏新艳, 范程士, 李继响等. 含亚甲氧基桥键负性单体液晶的制备及性能研究[J]. 液晶与显示, 2016,31(4): 353-357 DOI： 10.3788/YJYXS20163104.0353.

SU Xin-yan, FAN Cheng-shi, LI Ji-xiang etc. Preparation and properties of oxymethylene-bridged negative liquid crystal[J]. , 2016,31(4): 353-357 DOI： 10.3788/YJYXS20163104.0353.

摘要

含亚甲氧基桥键负性单体液晶由于具有较大的负介电各向异性

较低的旋转粘度、良好的相溶性而被广泛应用于VA-TFT配方中

但其合成步骤长

合成及提纯难度大。本文讨论了含亚甲氧基桥键及苯环侧向氟取代的负介电各向异性单体液晶的合成方法

该方法主要采用2

3-二氟-4-乙氧基苯酚与含不同长度烷基链的苯磺酸酯反应引入亚甲氧基桥键

避免了常用醚化方法中卤代物的使用和卤素离子对单体液晶性能的影响。使用

H NMR对目标单体液晶的结构进行了表征;采用DSC、热台偏光显微镜、LCR测试仪等对目标单体液晶的相变温度、光学各向异性、介电各向异性等一系列液晶性能参数进行了测试。

Abstract

Oxymethylene-bridged negative liquid crystal has been widely used in VA-TFT mixtures owing to its relatively large negative dielectric anisotropy

low viscosity and good phase solubility with other liquid crystals. However

the long synthetic route and difficulty in purification have been obstacles in application. In this paper

three oxymethylene-bridged negative liquid crystal compounds were synthesized via the etherification reaction of 4-ethoxy-2

3-difluorophenol with different alkylbenzene sulfonate. The method effectively avoids impurity resulting from the introduction of halogen ions in conventional method. All key compounds were characterized by

H NMR spectroscopy. The liquid crystal properties

such as phase transition temperature

optical anisotropy and dielectric anisotropy were measured by DSC

TPOM and LCR testing analyzer.

关键词

Keywords

references

胡明刚, 李建, 安忠维.V A-TFT用负介电各向异性液晶材料研究进展[J]. 化工新型材料, 2007, 35(5):5-6, 12. HU M G, LI J, AN Z W. Progress of liquid crystal materials for VA-TFT[J]. New Chemical Materials, 2007, 35(5):5-6, 12. (in Chinese)

CHEN Y, PENG F L, YAMAGUCHI T, et al. High performance negative dielectric anisotropy liquid crystals for display applications[J]. Crystals, 2013, 3(3):483-503.

YUN H J, JO M H, JANG I W, et al. Achieving high light efficiency and fast response time in fringe field switching mode using a liquid crystal with negative dielectric anisotropy[J]. Liquid Crystals, 2012, 39(9):1141-1148.

GAUZA S, JIAO M Z, WU S T, et al. High birefringence and low viscosity negative dielectric anisotropy liquid crystals[J]. Liquid Crystals, 2008, 35(12):1401-1408.

HIRD M. Fluorinated liquid crystals-properties and applications[J]. Chemical Society Reviews, 2007, 36(12):2070-2095.

范程士, 罗忠林, 刘克刚, 等. 含氟双二苯乙炔液晶的合成及液晶性[J]. 化工生产与技术, 2014, 21(1):1-6, 24. FAN C S, LUO Z L, LIU K G, et al. Synthesis of fluoride bis-diphenyl acetylene liquid crystal and the liquid crystal property[J]. Chemical Production and Technology, 2014, 21(1):1-6, 24. (in Chinese)

樊能廷. 有机合成事典[M].北京:北京理工大学出版社, 1992:270-270. FAN N T. Handbook of Organic Synthesis[M]. Beijing:Beijing Institute of Technology Press, 1992:270-270. (in Chinese)

王勇丽, 杜琼, 王国华, 等. 亚甲氧基桥键弯曲型液晶合成与性能研究[J]. 有机化学, 2013, 33(9):2010-2015. WANG Y L, DU Q, WANG G H, et al. Synthesis and property of oxymethylene-bridged bent-core liquid crystals[J]. Chinese Journal of Organic Chemistry, 2013, 33(9):2010-2015. (in Chinese)

吕文海, 孟劲松, 髙红茹, 等. 一类多氟负介电液晶单体的合成及性能研究[J]. 液晶与显示, 2015, 30(1):39-46. LV W H, MENG J S, GAO H R, et al. Synthesis and properties of polyfluorinated negative dielectic anisotropy liquid crystalline compounds[J]. Chinese Journal of Liquid Crystals and Displays, 2015, 30(1):39-46. (in Chinese)

GOHAIN M, DU P M, VAN TONDER J H, et al. Preparation of phenolic compounds through catalyst-free ipso-hydroxylation of arylboronic acids[J]. Tetrahedron Letters, 2014, 55(13):2082-2084.

Views

下载量

CSCD

Alert me when the article has been cited

提交

Tools

Publicity Resources

Overview of active terahertz metasurface devices based on liquid crystal

In-situ synthesis of gold nanoparticles in liquid crystal phases

Research progress on self-assembly of polyphilic liquid crystal molecules

Femtosecond laser-empowered liquid crystal photonics

Research progress on liquid crystal optical devices with viewing angle control characteristics

Related Author

SHEN Yanchun

XU Yaqian

HU Wei

LI Chenyue

YUAN Xiao

CHEN Yinjie

ZHANG Shuaifeng

ZHANG Lanying

Related Institution

Information Engineering Institute， Guangzhou Railway Polytechnic

College of Engineering and Applied Sciences， Nanjing University

College of Material Science and Engineering， University of Science and Technology Beijing

School of Materials Science and Engineering， Peking University

School of Printing and Packaging Engineering， Beijing Institute of Graphic Communication

AI问答

Address：No.3888 Dong Nanhu Road, Changchun, Jilin, China 130033 Postal code：130033
Tel：0431-86176059 Email：yjxs@ciomp.ac.cn
Technical support is provided by Beijing Founder electronics co., LTD 吉ICP备11002662号-17 京公网安备11010802024621
It is recommended to read the content of this site in Chrome&IE9+. Please switch to extreme mode in browser 360.
Cookies We use cookies to help provide and enhance our service and tailor content. By continuing, you agree to the use of cookies.

⁰