高等学校化学学报

高等学校化学学报 ›› 1995, Vol. 16 ›› Issue (3): 471.

• 论文 • 上一篇    下一篇

1,3-双-(介晶基)-1,1,3,3-四甲基二硅氧烷的合成和相变研究

张先亮, 张建强, 王成瑞, 卓仁禧   

  1. 武汉大学化学系, 武汉 430072
  • 收稿日期:1994-03-14 修回日期:1994-08-24 出版日期:1995-03-24 发布日期:1995-03-24
  • 通讯作者: 张先亮,男,56岁,副教授.
  • 作者简介:张先亮,男,56岁,副教授.
  • 基金资助:

    国家自然科学基金

Synthesis and Phase Behavior of 1,3-bis-(Mesogenes)-1, 1, 3, 3-tetra Methyldisiloxanes

ZHANG Xian-Liang, ZHANG Jian-Qiang, WANG Cheng-Rui, ZHUO Ren-Xi   

  1. Deparement of Chemistry, Wuhan University, Wuhan 430072
  • Received:1994-03-14 Revised:1994-08-24 Online:1995-03-24 Published:1995-03-24

PDF (PC)

被引次数

5

摘要： 合成了16种1,3-双-(介晶基)-1,1,3.3-四甲基二硅氧烷(Ⅱa,b,Ⅲa-g,Ⅲj,Ⅳa-f.其化学结构用1NMR、IR、UV和元素分析表征。通过DSC和偏光显微镜研究了它们的相行为,除Ⅱa,b、Ⅲd和Ⅳd外,其余都呈现液晶相变。用X衍射分析研究了1,3-双-(4-甲基偶氮苯氧甲基)-1,1,3,3-四甲基二硅氧烷(Ⅱa)的晶体结构。讨论了这些新型硅氧烷化合物的比学结构对液晶相变行为的影响。

关键词: 液晶, 硅氧烷, 合成, 相行为, 偶氮苯

Abstract: Sixteen 1, 3-bis-(mesogens )-1, 1, 3, 3-tetramethyl disiloxanes ( Ia,bⅢa-g, Ⅲj,IVa-f) were synthesized. Their chemical structures were confirmed by 1HNMR, IR, UV and elemental analysis. Their phase behaviors were also investigated by using differential scanning calorimeter(DSC) and polarizing microscope. The results show that twelve compounds exhibit the liquid crystalline (LC) plase transition temperatures except four cornpunds(Ⅱa.b,Ⅲd, IVd). X-ray diffraction has been used to investigate the crystal structure of 1, 3-bis-(4-methylazobenzene-oxy-methyl)-1, 1, 3, 3-tetrametbyl disiloxane (Ⅱa). The influence ofchemical structures of these novel siloxane compounds on LC phase behaviors were discussed.

Key words: Liquid crystalline, Siloxane, Synthesis Phase behavior, Azobenzene

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