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Chin. J. Org. Chem. ›› 2006, Vol. 26 ›› Issue (01): 129-133. Previous Articles     Next Articles

Reports

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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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