Characterization and comparison of Cm(III) and Eu(III) complexed with 2,6-di(5,6-dipropyl-1,2,4-triazin-3-yl)pyridine using EXAFS, TRFLS, and quantum-chemical methods

被引：135

作者：

Denecke, MA

Rossberg, A

Panak, PJ

Weigl, M

Schimmelpfennig, B

Geist, A

机构：

[1] Forschungszentrum Karlsruhe, Inst Nukl Entsorgung, D-76021 Karlsruhe, Germany

[2] Forschungszentrum Rossendorf EV, Inst Radiochem, D-01314 Dresden, Germany

来源：

INORGANIC CHEMISTRY | 2005年 / 44卷 / 23期

关键词：

D O I：

10.1021/ic0511726

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The complexation of Cm(Ill) and Eu(III) with 2,6-di(5,6-dipropyl-1,2,4-triazin-3-yl)pyridine (n-C3H7-BTP) in nonaqueous organic solution is studied with extended X-ray absorption spectroscopy. Bond lengths are the same in both complexes. Quantum-chemical calculations performed at different levels support this finding. On the other hand, the Cm-(n-C3H7-BTP)(3) complex is formed at much lower ligand-to-metal concentration ratio than the Eu-(n-C3H7BTP)(3) complex, as shown by time-resolved laser-induced fluorescence spectroscopy. This is in good agreement with n-C3H7-BTP's high selectivity for trivalent actinides over lanthanides in liquid-liquid extraction.

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页码：8418 / 8425

页数：8

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