Thermodynamic studies on N-diacetic acid substituted tetraazamacrocycle and its lanthanide complexes

被引：0

作者：

Bi, JH ^{[1
]}

Zhao, XAD ^{[1
]}

Ni, SS ^{[1
]}

Xie, FX ^{[1
]}

机构：

[1] ANHUI UNIV,DEPT CHEM,HEFEI 230039,PEOPLES R CHINA

来源：

CHEMICAL JOURNAL OF CHINESE UNIVERSITIES-CHINESE | 1997年 / 18卷 / 08期

关键词：

tetraazamacrocycle; lanthanide complex; stability constant; enthalpy;

D O I：

暂无

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The protonation constants of the macrocycle H2L(C-meso-meso-5,12-diphenyl-7,14-dimethyl-1,4,8,11-tetraazamacrocyclotetradecane-N,N ''-diacetic acid) were determined by potentiometric titration in 0.5 mol/L KCl solution at (25+/-0.1)degrees C, (30+/-0.1)degrees C and (40+/-0.1)degrees C, The changes of enthalpy and entropy in the coordination reaction of H2L with H+ in the solution were given, The stability constants of the complexes of H2L with La3+, Nd3+, Pr3+, Sm3+, Eu3+, Gd3+, Dy3+ and Yb3+ were determined by the same method at (40+/-0.1)degrees C. The experiment results obtained were discussed.

引用

页码：1251 / 1254

页数：4

共 14 条

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