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侧向多氟取代二芳基乙炔类液晶的合成及性能

莫玲超1,梁晓琴1,安忠维1,2*,陈新兵1,陈沛1   

  1. (1.陕西师范大学材料科学与工程学院，应用表面与胶体化学教育部重点实验室 西安 710100；
    2.西安近代化学研究所 西安 710065)
  • 收稿日期:2012-10-04 修回日期:2012-11-12 出版日期:2013-08-10 发布日期:2013-08-10
  • 通讯作者: 安忠维，教授; Tel/Fax:029-81530720; E-mail:gmecazw@163.com; 研究方向：液晶材料及光伏电池

Syntheses and Properties of Lateral Multi-fluorine Substituted Internal Alkynes Liquid Crystals

MO Lingchao1, LIANG Xiaoqin1, AN Zhongwei1,2*, CHEN Xinbing1, CHEN Pei1   

  1. (1.Key Laboratory of Applied Surface and Colloid Chemistry of Ministry of Education,
    School of Materials Science and Engineering,Shaanxi Normal University,Xi′an 710100，China;
    2.Xi′an Modern Chemistry Research Institute,Xi′an 710065，China)
  • Received:2012-10-04 Revised:2012-11-12 Published:2013-08-10 Online:2013-08-10

PDF

1718

被引次数

5 | 2

摘要： 以对烷基溴苯和4-溴-2,3-二氟苯酚为原料，经芳基硼酸化、Suzuki偶联反应、Sonogashira偶联反应和碘代等反应，制得16种侧向多氟取代二芳基乙炔类液晶化合物，其结构经IR、NMR和MS确认。 利用差示扫描量热仪（DSC）、偏光显微镜（POM）和阿贝折光仪对该系列化合物进行了性能研究。 结果表明，该系列化合物具有较低的熔点、宽的液晶相区以及较高的光学各向异性值（Δn＞0.3）。 该类液晶具有在双频液晶中应用的广阔前景。

关键词: 侧向多氟取代, 二芳基乙炔, 双频液晶

Abstract: Sixteen lateral multi-fluorine substituted internal alkynes liquid crystals were synthesized via a series of reactions including substituted phenylboronic acidation, Suzuki cross-coupling, Sonogashira cross-coupling and iodination using 4-bromo-alkylbenzene and 4-bromo-2,3-difluoro-phenol precursors. The structures of the products were characterized by means of IR, NMR and MS. The differential scanning calorimetric, polarizing microscope and Abbe refractometer, were used to investigate their properties. The results demonstrate that the compounds possess low melting point, wide phase transition interval and high optical anisotropy value(Δn＞0.3). The obtained liquid crystals might find broad potential applications in dual-frequency liquid crystals.

Key words: lateral multi-fluorine substituted, internal alkynes, dual-frequency liquid crystals

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