高等学校化学学报

高等学校化学学报 ›› 1995, Vol. 16 ›› Issue (9): 1385.

• 论文 • 上一篇    下一篇

张先亮1, 单大庆1, 曹连欣2, 刘启才2, 卓仁禧1   

  1. 1. 武汉大学化学系, 武汉, 430072;
    2. 武汉大学测试中心, 武汉, 430072
  • 收稿日期:1994-09-12 修回日期:1995-03-15 出版日期:1995-09-24 发布日期:1995-09-24
  • 通讯作者: 张先亮,男,57岁,教授.
  • 作者简介:张先亮,男,57岁,教授.
  • 基金资助:

    国家自然科学基金

Synthesis and Phase Behavior of Chiral Liquid Crystalline Compounds with the Structure of L-Amino Acid Derivative

ZHANG Xian-Liang1, SHAN Da-Qing1, CAO Lian-Xin2, LIU Qi-Cai2, ZHUO Ren-Xi1   

  1. 1. Department of Chemistry Wuhan University, Wuhan, 430072;
    2. Test Center Wuhan University, Wuhan, 430072
  • Received:1994-09-12 Revised:1995-03-15 Online:1995-09-24 Published:1995-09-24

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摘要： 合成了9种具L-氨基酸衍生物结构的介晶化合物(I-Ⅲ,Ⅳa,b,Ⅴa,b,Ⅵa,b)、4种氨基酸衍生物(A1-4)和6种介晶化合物(M1-6).新化合物(Ⅰ-Ⅲ,Ⅳa,b,Ⅴa,b,Ⅵa,b,A4,M3-6)的化学结构通过IR、1HNMR和元素分析证实;并用偏光显微观察和DSC分析研究了其相变行为,结果表明有8种化合物(M3-6,Ⅵa,b,Ⅴb,Ⅵb)呈现液晶相变。测定了它们的比旋光度。通过X射线衍射研究了化合物Ⅵh120～130℃和Ⅵb170～180℃的近晶结构,Ⅵb显SC*,Ⅵb呈SE*。测定了化合物Ⅳb的电滞回线,证明其具铁电性。

关键词: 液晶, L-氨基酸, 手性, 合成, 相变行为

Abstract: Nine mesogenic compounds(I-Ⅲ, Ⅳa,b,Va,b,Ⅵa,b) with the structure of Lamino acid derivative, four L-amino derivatives (A1-4) and six mesogenic compounds (M1-6) were synthesized.The chemical structure of new compounds (I-Ⅲ,Ⅳa,b,Va,b,Ⅵa,b,A4and M3-6)were confirmed by IR, 1HNMR and elemental analysis.Their phase behavior was also investigated by using differential scanning calorimetry (DSC) and polarizing microscopy, The resultis show that eight compounds(M3-6,Ⅳa,b,Vband Ⅵb) exhibit the liquid crystalline plase transtion temperatures,The specific rotation of the compounds was also determined.X-Ray diffraction had been used to investigate smectic structure of two compounds,the results show that compounds(Ⅳb,Ⅵb) exhibit SC*and SE*respectively.The hysteresis loop of Ⅳbwere determined, it is proved that Ⅵbdo have ferroelectricity.

Key words: Liquid crystalline (LC), L-Amino acid, Chiral, Synthesis, Phase transition behavior

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