噁二唑类弯曲形液晶分子的合成

黄 佩; 胡兰萍; 沈 冬

doi:null

您当前的位置：

首页 >

文章列表页 >

噁二唑类弯曲形液晶分子的合成

材料物理和化学 | 更新时间：2020-08-12

- 噁二唑类弯曲形液晶分子的合成
- Synthesis of Bent-Core Liquid Crystals with Oxadiazole
- 液晶与显示 2010年25卷第5期页码：626-634
- 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：
  
  国家自然科学基金(No.60878047)()
- DOI：
  中图分类号： TN141.9
- 收稿日期：2010-03-20，
  
  修回日期：2010-04-18，
  
  网络出版日期：2010-09-28，
  
  纸质出版日期：2010-10-20
- 稿件说明：
移动端阅览
张卓, 赵海玉, 张培林, 柳在健. 基于重压法的Touch Mura形变过程模拟[J]. 液晶与显示, 2010,25(5): 693-695

ZHANG Zhuo, ZHAO Hai-yu, ZHANG Pei-lin, YOU Jae-geon. Simulation of Deformation Process by Weight-Pressing Method[J]. 液晶与显示, 2010,25(5): 693-695
张卓, 赵海玉, 张培林, 柳在健. 基于重压法的Touch Mura形变过程模拟[J]. 液晶与显示, 2010,25(5): 693-695 DOI：

ZHANG Zhuo, ZHAO Hai-yu, ZHANG Pei-lin, YOU Jae-geon. Simulation of Deformation Process by Weight-Pressing Method[J]. 液晶与显示, 2010,25(5): 693-695 DOI：

摘要

设计并完成了3个系列弯曲形液晶分子2

5-二(4-羟基苯基)-1

4-噁二唑类(ODBP)衍生物的合成工作。经差示扫描量热仪(DSC)和偏光熔点测定仪测定

对称型三环醚类噁二唑系列化合物没有液晶性能;对称型五环酯类噁二唑系列化合物出现双轴向列相

相区较宽(29~54 ℃)

但清亮点均在200 ℃以上;含氟原子或氰基为端基的不对称型五环酯类噁二唑系列化合物的清亮点都在270 ℃以上

失去双轴向列相。

Abstract

Three series of bent-core liquid crystals

the derivatives of 2

5-bis-(p-hydroxyphenyl) -1

4-oxadiazole(ODBP) were synthesized

their transition temperatures were studied by DSC (Differential Scanning Calorimetry) and POM (Polarizing Optical Microscope). It was found that symmetric oxadiazoline ether derivatives with three benzene rings dont exhibit LC phase; symmetric oxadiazoline ester derivatives with five rings (benzene or trans-cyclohexane) show biaxial nematic(N

) phase with large temperature range (29~54 ℃)

but the clearing temperatures were over 200 ℃. Asymmetric oxadiazoline ester derivatives with F or CN as a terminal group show rather high clearing temperatures (

270 ℃)

but without N

phase.

关键词

Keywords

references

Freiser M J. Ordered states of a nematic Liquid

. Phys. Review Lett., 1970, 24 (19):1041-1043.

Yu L J, Saupe A. Observation of a biaxial nematic phase in potassium laurate-1-Decanol-Water mixtures

. Phys. Rev. Lett., 1980, 45 (12):1000-1003.

Luckhurst G R. Biaxial nematic liquid crystals: factor fiction?

. Thin Solid Films, 2001, 393(1-2):40-52.

Zafiropoulos N A, Lin W B, Samulski E T, et al. Asymmetric oxadiazole mesogens as candidates for low-temperature biaxial nematics

. Liquid Crystals, 2009, 36 (6-7):649-656.

Lehmann M, Kohn C, Kresse H, et al. Synthesis and properties of oxadiazole based V-shaped, shape persistent nematogens

. Chem. Communications, 2008, (15):1768-1770.

Lehmann M, Kang S W, Khn C, et al. Shape-persistent V-shaped mesogens-formation of nematic phases with biaxial order

. J. Materials Chemistry, 2006, 16 (44):4326 - 4334.

Dingemans T J, Madsen L A, Zafiropoulos N A, et al. Uniaxial and biaxial nematic liquid crystals

. Philosophical Transactions of the Royal Society a-Mathematical Physical and Engineering Sciences, 2006, 364 (1847):2681-2696.

Lehmann M, Levin J. Rigid phenylene ethynylene units linked by a V-shaped centre.An approach to biaxial nematogens?

. Molecular Crystals & Liquid Crystals, 2004, 411 (1): 273-281.

Madsen L A, Dingemans T J, Nakata M, et al. Thermotropic biaxial nematic liquid crystals

. Phys. Rev. Lett., 2004, 92 (14):145501-145505.

Acharya B R, Primak AKumar S. Biaxial nematic phase in bent-core thermotropic mesogens

. Phys. Rev. Lett., 2004, 92 (14):145506-145509.

Prasad V, Kang S W, Suresh K A, et al. Thermotropic uniaxial and biaxial nematic and smectic phases in bent-core mesogens

. J. American Chem. Society, 2005, 127 (49):17224-17227.

田禾, 许兆武, 花建丽,等.噁二唑衍生物及其在电致发光材料中应用:中国,CN 1919842A .2007-02-28.

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

暂无数据