新型氮杂18-冠-6衍生物的合成及其与阳离子的配位性能  

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

作　　者：张强[1] 

机构地区：[1]内蒙古师范大学化学与环境科学学院,呼和浩特010022

出　　处：《化学学报》2008年第5期567-570,共4页Acta Chimica Sinica

基　　金：内蒙古自然科学基金(Nos.200508010212;200607010207)资助项目

摘　　要：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319nm逐渐红移到426nm,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.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^＋, Mg^2＋, Ca^2＋, Sr^2＋, Ba^2＋and Pb^2＋ were studied by the UV-vis method in HEO-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 Ba^2＋ and Pb^2＋.

关 键 词：氮杂冠醚 合成 阳离子 配位性能 

分 类 号：O641.4[理学—物理化学]