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化学学报
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化学学报 ›› 2008, Vol. 66 ›› Issue (5): 567-570. 上一篇    下一篇

研究论文

新型氮杂18-冠-6衍生物的合成及其与阳离子的配位性能

张强   

  1. (内蒙古师范大学化学与环境科学学院 呼和浩特 010022)
  • 投稿日期:2007-09-07 修回日期:2007-11-21 发布日期:2008-03-14
  • 通讯作者: 张强

Synthesis of a Novel Tetraaza-18-crown-6 Derivative and Its Complexation Properties with Cations

ZHANG Qiang   

  1. (College of Chemistry and Environmental Science, Inner Mongolia Normal University, Huhhot 010022)
  • Received:2007-09-07 Revised:2007-11-21 Published:2008-03-14
  • Contact: ZHANG Qiang

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881

被引次数

13 | 2

通过1,10-二氧-4,7,13,16-四氮杂18-冠-6 (1)与2-羟基-5-硝基苄基溴反应合成了一个四硝基酚取代的氮杂18-冠-6衍生物(2). 采用UV-Vis光谱法研究了混合溶剂中冠醚2对H＋, Mg2＋, Ca2＋, Sr2＋, Ba2＋和Pb2＋的光谱响应及配位性能. 结果表明, 随溶液pH值的增大, 冠醚2的最大吸收峰由319 nm逐渐红移到426 nm, 并伴随着强度的增大; 其与几种阳离子形成配合物的稳定常数随阳离子半径的增加而增大, 从而展示了对Ba2＋和Pb2＋高的配位能力.

关键词: 氮杂冠醚, 合成, 阳离子, 配位性能

A tetraaza-18-crown-6 derivative (2) was synthesized by reaction of 1,10-dioxa-4,7,13,16- tetraaza-18-crown-6 (1) with 2-hydroxy-5-nitrobenzyl bromide. Its complexation properties with H＋, Mg2＋, Ca2＋, Sr2＋, Ba2＋and Pb2＋ were studied by the UV-vis method in H2O-DMSO mixed solvent. The results obtained indicate that a remarkable bathochromic shift of the absorption maximum of compound 2 occurs from 319 to 426 nm upon the increase of pH, and the corresponding absorption intensity also increases. Furthermore, the binding constants for complexation of 2 with these cations increase with increasing ionic radii, and the highest binding abilities were observed for Ba2＋and Pb2＋.

Key words: azacrown ether, synthesis, cation, complexation