Characterization of extraction complexes of Am(III) with dialkyldithiophosphinic acids by extended X-ray absorption fine structure spectroscopy

被引：28

作者：

Tian, GX ^{[1
]}

Zhu, YJ

Xu, JM

Hu, TD

Xie, YN

机构：

[1] Tsing Hua Univ, Inst Nucl Energy Technol, Beijing 100084, Peoples R China

[2] Chinese Acad Sci, Inst High Energy Phys, BSRF, Beijing 100039, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2002年 / 334卷 / 1-2期

关键词：

EXAFS; actinide elements; separations;

D O I：

10.1016/S0925-8388(01)01783-2

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 structure of extraction complexes of Am(Ill) with di-n-octyldithiophosphinic acid and di(2,4,4-trimethylpentyl)dithiophosphinic acid in kerosene have been studied by extended X-ray absorption fine structure (EXAFS) spectroscopy. The EXAFS spectra demonstrate that the two extraction complexes are analogous in coordination structure with eight sulfur atoms coordinated in inner sphere. The coordination numbers and distances from the central Am atom to the nearest shell and the second shell atoms are: S, n=7.8+/-1, R=2.92 Angstrom; P, n=3.8+/-0.5, R=3.47 Angstrom for di-n-octyldithiophosphinic acid and S, n=7.8+/-1, R=21.98 Angstrom; P, n=3.7+/-0.4, R=3.58 Angstrom for di(2,4,4-trimethylpentyl) dithiophosphinic acid. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：86 / 91

页数：6

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