期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 303, 期 -, 页码 137-141出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/S0925-8388(00)00620-4
关键词
americium; lanthanides; stability constants; complexation; soft donors
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.
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