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有机化学
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有机化学 ›› 2006, Vol. 26 ›› Issue (01): 129-133. 上一篇    下一篇

研究简报

偶氮型液晶冠醚的合成与表征

张淑媛1，朱鑫1，张晓静2，郑世军2，李自法*,2   

  1. (1郑州大学化学系 郑州 450052)
    (2郑州大学材料工程学院 郑州 450052)
  • 收稿日期:2005-03-08 修回日期:2005-07-18 发布日期:2005-12-31
  • 通讯作者: 李自法

Synthesis and Characterization of Azo Type Liquid Crystalline Crown Ethers

ZHANG Shu-Yuan1,ZHU Xin1,ZHANG Xiao-Jing2,ZHENG Shi-Jun2,LI Zi-Fa*,2   

  1. (1 Department of Chemistry, Zhengzhou University, Zhengzhou 450052)
    (2 College of Materials and Engineering, Zhengzhou University, Zhengzhou 450052)
  • Received:2005-03-08 Revised:2005-07-18 Published:2005-12-31
  • Contact: LI Zi-Fa

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被引次数

8 | 1

以4'-正烷氧基联苯-4-甲酸和顺(反)-4,4'-双(4-羟基苯基偶氮)二苯并-14-冠-4为中间体, 通过溶液缩合反应, 合成了一系列偶氮型液晶冠醚. 并用元素分析、核磁共振、紫外可见分光光度计、红外光谱、基质辅助激光解析电离飞行时间质谱、示差扫描量热法和偏光显微镜对其进行了表征. 随分子末端烷氧基碳原子数增加, 化合物4I和4II的熔点(Tm)和液晶态的清亮点(Ti)逐渐降低, 液晶态温度范围较宽.

关键词: 偶氮型, 冠醚, 热致性液晶, 合成

A series of azo type liquid crystalline crown ethers were synthesized using the intermediates of 4'-n-alkoxylbiphenyl-4-carboxylic acids and cis(trans)-4,4'-bis(4-hydroxyphenylazo)dibenzo-14-crown-4. Their structures and properties were characterized by elemental analysis, 1H NMR, UV-Vis, IR, MALDI-TOF-MS, DSC and polarizing optical microscopy with a heating stage. For compounds 4I and 4II, both melt-ing point Tm and isotropization temperature Ti were decreased with the increase of the carbon numbers of the end alkoxy groups. However, the temperature range of liquid crystal phase was relatively wide.

Key words: thermotropic liquid crystal, synthesis, crown ether, azo type