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化学学报
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化学学报 ›› 2006, Vol. 64 ›› Issue (8): 743-750. 上一篇    下一篇

研究论文

含氧亚甲基中心桥键席夫碱型液晶化合物的合成及介晶性

高彩艳，赵可清*，汪必琴，胡平   

  1. (四川师范大学化学与材料科学学院 成都 610066)
  • 投稿日期:2005-09-14 修回日期:2005-12-21 发布日期:2006-04-25
  • 通讯作者: 赵可清

Synthesis and Mesogenic Behaviors of Schiff Base Liquid Crystal with CH2O Bridge

GAO Cai-Yan, ZHAO Ke-Qing*, WANG Bi-Qin, HU Ping   

  1. (College of Chemistry and Material Science, Sichuan Normal University, Chengdu 610066)
  • Received:2005-09-14 Revised:2005-12-21 Published:2006-04-25
  • Contact: ZHAO Ke-Qing

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956

被引次数

21

报道了两个系列含氧亚甲基中心桥键席夫碱型棒状液晶化合物的合成, 其结构通式为: XC6H4N＝CHC6H3(Y)OCH2C6H4COOC16H33, Y＝H, OCH3; X＝OCnH2n＋1 (n＝1～12, 14, 16), Me, F, Cl, Br. 通过热台偏光显微镜和DSC对其介晶性进行了研究. 结果显示分子中末端烷氧基链长的变化和苯环侧向取代基Y对这些液晶化合物的介晶性有重要影响.

关键词: 液晶, 席夫碱, CH2O中心桥键, 近晶相A相, 近晶相B相

Two series of rod-like Schiff base liquid crystals with CH2O bridge were synthesized, which have the structure of XC6H4N＝CHC6H3(Y)OCH2C6H4COOC16H33, Y＝H, OCH3; X＝OCnH2n＋1 (n＝1～12, 14, 16), Me, F, Cl, Br. Their mesogenic behaviors were studied with DSC and polarized optical microscopy. These results showed that the change of end substituents X and side substituent Y of benzene ring in the molecules had important effects on mesogenic properties of these liquid crystalline compounds.

Key words: liquid crystal, Schiff base, CH2O bridge, smectic A phase, smectic B phase