氮杂大环与钴(Ⅱ)配合物的合成及稳定性研究

Cobalt(Ⅱ) Complex of the Tetraazamacrocycle.Synthesis and Stability Study

在水溶液中合成了H4L1(5,12- 二苯基-7 ,14- 二甲基- 1 ,4 ,8,11 - 四氮杂环十四烷- N′,N″,N′″,N″″- 四乙酸) 与钴( Ⅱ) 的固体配合物,经元素分析和IR 表征其组成为CoH2L1·2H2 O。用pH 电位滴定技术在30 ±0 .1 ℃,0 .5 mol/LKCl 水溶液中测定了配合物的稳定常数。

A New solid cobalt(Ⅱ) complex of H 4L 1(5,12-diphenyl-7,14-dimethyl-1,4,8,11-tetraazamacrocyclo-tetradecane-N′,N″,N′″,N″″-tetraacetic acid) has been synthesized in aqueous solution and characterized by elemental analysis and IR spectra.The complex has constant stoichiometry CoH 2L 1·2H 2O.The stability constant of the complex were determined at 30±0.1℃ in 0.5mol/L KCl by potentiometry.