四环二氟甲醚桥键液晶化合物性能研究

李娟利; 李建; 车昭毅; 甘宁; 安忠维; 杨晓哲; 陈涛

doi:10.3788/YJYXS20142903.0311

您当前的位置：

首页 >

文章列表页 >

四环二氟甲醚桥键液晶化合物性能研究

材料物理和化学 | 更新时间：2020-08-12

- 四环二氟甲醚桥键液晶化合物性能研究
- Properties of four ring chain liquid crystalline compounds with difluoromethyleneoxy linkage group
- 液晶与显示 2014年29卷第3期页码：311-316
- 作者机构：
  
  西安近代化学研究所光电材料事业部, 陕西西安 710065
- 作者简介：
- 基金信息：
- DOI：10.3788/YJYXS20142903.0311
  中图分类号： O753+.2
- 收稿日期：2013-09-04，
  
  修回日期：2013-09-30，
  
  网络出版日期：2013-11-01，
  
  纸质出版日期：2014-04-25
- 稿件说明：
移动端阅览
李娟利, 李建, 车昭毅, 甘宁, 安忠维, 杨晓哲, 陈涛. 四环二氟甲醚桥键液晶化合物性能研究[J]. 液晶与显示, 2014,29(3): 311-316

LI Juan-li, LI Jian, CHE Zhao-yi, GAN Ning, AN Zhong-wei, YANG Xiao-zhe, CHEN Tao. Properties of four ring chain liquid crystalline compounds with difluoromethyleneoxy linkage group[J]. , 2014,29(3): 311-316
李娟利, 李建, 车昭毅, 甘宁, 安忠维, 杨晓哲, 陈涛. 四环二氟甲醚桥键液晶化合物性能研究[J]. 液晶与显示, 2014,29(3): 311-316 DOI： 10.3788/YJYXS20142903.0311.

LI Juan-li, LI Jian, CHE Zhao-yi, GAN Ning, AN Zhong-wei, YANG Xiao-zhe, CHEN Tao. Properties of four ring chain liquid crystalline compounds with difluoromethyleneoxy linkage group[J]. , 2014,29(3): 311-316 DOI： 10.3788/YJYXS20142903.0311.

摘要

二氟甲醚桥键类液晶是目前广泛使用的一类液晶化合物，但是其相关相变行为和物理参数很少有系统地报道。本文采用DSC、POM测试，对系列1和2共计7种含环己烷的四环骨架二氟甲醚桥键液晶单体的介晶性进行了研究，并考察了不同单体对混合液晶性能的影响规律，采用加法原理对各系列单体的物理性能参数进行了外推。结果表明，与系列2化合物相比，系列1单体具有更高的清亮点和更宽的向列相温度范围。系列2单体由于氟原子数的增加，介电各向异性值增大。系列1单体可显著改善混合液晶的低温相溶性，有利于拓宽混合液晶的使用温度。

Abstract

Liquid crystalline compounds with difluoromethyleneoxy linkage group are widely used in liquid crystal mixtures.However

their phase behavior and physical properties have not been reported systematically.The mesomorphic properties of two series of compounds 1 and 2 with cyclohexyl group were thoroughly studied by using differential scanning calorimetry(DSC) and polarizing optical microscopy(POM).The effect of all the compounds on the mixtures were systematically investigated and their physical parameters were extropolated by using addition principle.The results show that compounds 1 have higher clearing point and wider nematic phase temperature range than that of compounds 2.Due to the increase of a fluorine atom on the skeleton

compounds 2 have higher dielectric anisotropy than that of compounds 1.Compounds 1 can significantly improve low temperature miscibility and broaden the mixed liquid crystal temperature range.

关键词

Keywords

references

王新久.液晶光学和液晶显示 [M].北京: 科学出版社,2006. Wang X J.Liquid Crystal Optics and Liquid Crystal Display [M].Beijing: Science Press, 2006. (in Chinese)[2] Seunghee L, Surjya S B, Heui S J, et al.Devices and materials for high-performance mobile liquid crystal displays [J].J. Mater. Chem.,2012, 22(1): 11893-11903.[3] 李娟利,李建,杜渭松,等. 低阈值TFT液晶材料物理性能研究[J]. 液晶与显示, 2010,25(2): 166-171. Li J L, Li J, Du W S, et al.Study on physical properties of TFT liquid crystals having low threshold voltage [J].Chinese Journal of Liquid Crystals and Displays,2010,25(2): 166-171. (in Chinese)[4] 张兴,郑成武,李宁,等. 液晶材料与３D显示[J]. 液晶与显示, 2012,27(4): 448-455. Zhang X, Zheng C W, Li N, et al.Liquid crystal materials and 3D display [J].Chinese Journal of Liquid Crystals and Displays,2012,27(4): 448-455. (in Chinese)[5] Matsui S, Kondo T,Sago K. Synthesis and properties of novel liquid crystalline compounds having a difluoromethy-leneoxy moiety as a linkage group [J].Mol. Cryst. Liq. Cryst. ,2004, 411(1): 127-137.[6] Hiraoka T, Fujita A. Novel liquid crystalline four ring chain difluoromethyleneoxy compounds for quicker response LC mixtures [J].Mol. Cryst. Liq. Cryst.,2009,509(1): 89-95.[7] Tanaka H, Fujita A. Nematic liquid crystal compounds with five-ring framework [J].Mol. Cryst. Liq. Cryst. ,2009, 509(1): 118-133.[8] 田中裕之. 具有CF2O结合基的五环液晶化合物、液晶组成物以及液晶显示元件,中国: CN200880006097.X[P].2010-01-20. Tian Z Y Z. Liquid crystalline five ring china difluoromethyleneoxy compounds, LC mixtures and LCD, China:CN20080006097.X[P].2010-01-20.(in Chinese)[9] Tomovuki K, Kouki S, Shuichib M, et al.Difluoromethyl ethera derivative and process for producing the same, US: 2002120168A1[P]. 2002-08-29.

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

低阈值TFT液晶材料物理性能研究

液晶材料电学特性随温度变化研究

侧位含氟苯乙炔类液晶化合物的微波介电性能

5, 6-二氟苯并呋喃：新的核结构用于液晶分子设计

含氟三环NCS液晶材料的介电性能研究