Synthesis and properties of polyfluorinated negative dielectic anisotropy liquid crystalline compounds

LV Wen-hai; MENG Jin-song; GAO Hong-ru; YUN Guo-liang; HUA Rui-mao

doi:10.3788/YJYXS20153001.0039

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Synthesis and properties of polyfluorinated negative dielectic anisotropy liquid crystalline compounds

Material Physics & Chemistry | 更新时间：2020-08-12

- Synthesis and properties of polyfluorinated negative dielectic anisotropy liquid crystalline compounds
- Chinese Journal of Liquid Crystals and Displays Vol. 30, Issue 1, Pages: 39-46(2015)
- 作者机构：
  
  1. 石家庄诚志永华显示材料有限公司,河北石家庄,050091
  2. 河北省平板显示材料工程技术研究中心,河北石家庄,050091
  3. 清华大学化学系北京,100084
- 作者简介：
- 基金信息：
- DOI：10.3788/YJYXS20153001.0039
  CLC： O753+.2
- Received：30 May 2014，
  
  Revised：16 July 2014，
  
  Published：05 February 2015
- 稿件说明：
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吕文海, 孟劲松, 高红茹, 贠国良, 华瑞茂. 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 Wen-hai, MENG Jin-song, GAO Hong-ru, YUN Guo-liang, HUA Rui-mao. Synthesis and properties of polyfluorinated negative dielectic anisotropy liquid crystalline compounds[J]. , 2015,30(1): 39-46
吕文海, 孟劲松, 高红茹, 贠国良, 华瑞茂. 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 DOI： 10.3788/YJYXS20153001.0039.

LV Wen-hai, MENG Jin-song, GAO Hong-ru, YUN Guo-liang, HUA Rui-mao. Synthesis and properties of polyfluorinated negative dielectic anisotropy liquid crystalline compounds[J]. , 2015,30(1): 39-46 DOI： 10.3788/YJYXS20153001.0039.

摘要

为了满足液晶母体在各种情况下的参数要求

合成了6种新型的具有2个或2个以上的2

3-二氟苯基的有较大负介电各向异性的化合物.以2

3-二氟丙基苯或2

3-二氟苯乙醚为原料

通过一系列反应合成了目标液晶单体.经过核磁共振、元素分析和质谱等方法确定了分子结构;利用示差扫描量热仪、阿贝折射仪和电容电抗测试仪等测试手段对其进行测定.实验表明

这类多氟化合物有着较大的光学各向异性(

=0.22~0.33)和较大负值的介电各向异性(

=-7.63~-12.02).该类型的多氟化合物可以用于液晶母体的调配并且改善其部分性能.这类多氟化合物原料易得、收率较高(总收率50%)

极易实现工业量产.

Abstract

In order to meet the different demands of the LCD

six novel polyflurinated dielectric anisotropy liquid crystalline compounds were synthesized. These compounds were synthesized from 2

3-difluoro-propylbenzene or 2

3-difluoro-1-ethoxybenzene by several steps. Their constructions were confirmed by NMR

elemental analysis and GC-MS. The parameters and the performances of these products were measured by DSC

Abbe refractometer and capacitance inductance tester. These polyfluorinated compounds have large optical anisotropy(

=0.22~0.33)and large negative dielectric anisotropy(

=-7.63~-12.02). These compounds can be used in the LCD matrix to improve partial performance of the LCD. The preparation method is of simple operation and low cost (totle yield: 50%)

which can also realize industrialization easily.

关键词

Keywords

references

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Related Institution

诚志永华显示材料有限公司北京研发中心

Information Engineering Institute， Guangzhou Railway Polytechnic

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

School of Materials Science and Engineering， Peking University

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