物理化学学报 >> 2005, Vol. 21 >> Issue (04): 354-359.doi: 10.3866/PKU.WHXB20050403

研究论文 上一篇    下一篇

NMR和XAFS方法研究溶液中杯芳冠醚与碱金属离子配位化学

高建勋; 王建晨; 宋崇立; 刘涛; 胡天斗; 谢亚宁; 杨槐   

  1. 北京科技大学材料科学与工程学院, 北京 100083; 清华大学核能与新能源研究院, 北京 100084; 中国科学院高能物理研究所, 北京 100039
  • 收稿日期:2004-08-16 修回日期:2004-11-04 发布日期:2005-04-15
  • 通讯作者: 高建勋 E-mail:gaojianxun99@mails.tsinghua.edu.cn

A Study on the Coordination Chemistry of Calixcrowns with Metal Ions in Solution by NMR and XAFS

GAO Jian-Xun; WANG Jian-Chen; SONG Chong-Li; LIU Tao; HU Tian-Dou; XIE Ya-Ning; YANG Huai   

  1. School of Material Science and Technology, University of Science and Technology, Beijing 100083;  Institute of Nuclear Energy and Technology of Tsinghua University, Beijing 100084; BSSR, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100039
  • Received:2004-08-16 Revised:2004-11-04 Published:2005-04-15
  • Contact: GAO Jian-Xun E-mail:gaojianxun99@mails.tsinghua.edu.cn

摘要: 给出了1,3-二辛氧基杯[4]芳烃冠醚-6(25,27-bis-octyloxy-calix[4]arene-26,28-crown-6, BOC6)和杯[4]芳烃双冠醚-6(1,3-alternate biscrown-6, BisC6)晶体结构参数, 用NMR(CDCl3作溶剂)和XAFS(X-ray absorption fine structure)方法研究了邻硝基苯甲醚(o-nitro-phenyl methyl ether, NPME)和正辛醇(n-octyl alcohol, OA)溶液中BOC6和BisC6与碱金属离子的配位行为. 结果表明: 铯离子的嵌入使得杯芳冠醚分子中冠醚链的对称性明显提高; 在溶液中,配合物分子中铯离子的配位数为7, 7个氧的配位是一种稳定结构.

关键词: BOC6, BisC6, XAFS, NMR

Abstract: In order to study the coordination chemistry of calixcrowns in solution, the single crystals of 25,27-bis-octyloxy-calix[4]arene-26,28-crown-6 (BOC6) and 1,3-alternate biscrown-6 (BisC6) are presented in the paper. By using NMR and XAFS, the coordination behaviors of BOC6 and BisC6 in CDCl3 and NPME (o-nitro-phenyl methyl ether) or OA (n-octyl alcohol) with alkali metal ion are studied respectively. The results indicate that the symmetry of the crown ether chain is improved obviously as the cesium ion is imbedded in. The coordination number of cesium is seven and the complex structure with seven-oxygen coordination is stable in solution. One of the nitrate radical oxygen might coordinate with cesium directly.

Key words: BOC6, BisC6, XAFS, NMR