Aqueous complexation of trivalent lanthanide and actinide cations by N,N,N′,N′-tetrakis(2-pyridylmethyl)ethylenediamine

被引：77

作者：

Jensen, MP

Morss, LR

Beitz, JV

Ensor, DD

机构：

[1] Argonne Natl Lab, Div Chem, Argonne, IL 60439 USA

[2] Argonne Natl Lab, Div Chem Technol, Argonne, IL 60439 USA

[3] Tennessee Technol Univ, Dept Chem, Cookeville, TN 38505 USA

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2000年 / 303卷

关键词：

americium; lanthanides; stability constants; complexation; soft donors;

D O I：

10.1016/S0925-8388(00)00620-4

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The aqueous complexation reactions of trivalent lanthanide and actinide cations with the hexadentate ligand N,N,N',N'-tetrakis(2-pyridylmethyl)ethylenediamine (TPEN) have been characterized using potentiometric and spectroscopic techniques in 0.1 M NaClO4. At 25 degrees C, the stability constant of Am(TPEN)(3+) is two orders of magnitude larger than that of Sm(TPEN)(3+), reflecting the stronger interactions of the trivalent actinide cations with softer ligands as compared to lanthanide cations. (C) 2000 Elsevier Science S.A. All rights reserved.

引用

页码：137 / 141

页数：5

共 19 条

[1] PYRIDINE-DERIVATIVES AS COMPLEXING AGENTS .11. THERMODYNAMICS OF METAL-COMPLEX FORMATION WITH BIS[(2-PYRIDYL)METHYL]-AMINE, TRIS[(2-PYRIDYL)METHYL]-AMINE AND TETRAKIS[(2-PYRIDYL)METHYL]-AMINE [J].