高等学校化学学报 ›› 1991, Vol. 12 ›› Issue (3): 403.

• 论文 • 上一篇    下一篇

电导法对几种液晶冠醚与KClO4络合作用的研究

何玉萼, 胡长忠, 陈绍谦, 谢明贵   

  1. 四川大学化学系, 610064
  • 收稿日期:1989-09-01 出版日期:1991-03-24 发布日期:1991-03-24
  • 通讯作者: 何玉萼
  • 基金资助:

    国家自然科学基金

A Conductometric Study on K+-Mesomorphic Crown Ether Complexes in CH3CN+CHC13

He Yu-e, Hu Chang-zhong, Chen Shao-qian, Xie Ming-gui   

  1. Department of Chemistry, Sichuan Unmrsity, Chengdu, 610064
  • Received:1989-09-01 Online:1991-03-24 Published:1991-03-24

摘要: 近年来国内外相继报道了在冠醚核心上引入取代基合成出一系列具有液晶特性的冠醚化合物,它们除具有普通液晶的电光、电磁及超声等特性外,还具有选择性络合金属离子的能力。研究这类化合物结构及性能将有助于选择和制备对金属离子具有高度识别能力的输送膜。为此,我们研究了以二苯并-18-冠-6(DB-18-C-6)及苯并-15-冠-5(B-15-C-5)为核心衍生的胆甾型冠醚化合物。经红外、核磁、质谱及元素分析确定其结构,由差热分析和偏光显微镜观察证明其具有液晶特性,并用电导法探讨了该系列液晶化合物与KClO4在25℃时的络合特性,测定了络合比及络合常数。

关键词: 液晶冠醚, 络合常数, 电导

Abstract: The complex constants Ktfor 1 :1 complexes of KC1O4with cholesteryloxy-carbonyl mesomorphic crown ether compounds derived from DB-18-C-6 and B-15-C-5, i. e. cis(trains)-4, 4'-bis-[(N-cholesteryloxy-carbonyl) amino]-dibenzo-18-crown-6-(C-l and C-2), 4'-[(N-cholesteryloxy-carbonyl) amino]-benzo-15-crown-5(C-3), were determined at 25℃ in CH3CN+CHCl3conducto-metrically. The results show that the complex behaviour of K+ toward crown ether compounds depends on the solvability and ring hole size of macrocyclic polyethers. The lgKtof K+toward C-l, C-2 and C-3 in CH3CN+CHCl3are 5. 56±0. 03, 5. 77±0. 02 and 4. 85±0. 02, respectively.

Key words: Mesomorphic crown ether, Complex constant, Conductance

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