A TRLFS study on the complexation of Cm(III) and Eu(III) with 4-t-butyl-6,6′-bis-(5,6-diethyl-1,2,4-triazin-3-yl)-2,2′-bipyridine in a water/2-propanol mixture

被引：56

作者：

Trumm, Sascha ^{[1
,2
]}

Lieser, Georg ^{[3
]}

Foreman, Mark R. S. J. ^{[4
]}

Panak, Petra J. ^{[1
,2
]}

Geist, Andreas ^{[1
]}

Fanghanel, Thomas ^{[2
,5
]}

机构：

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

[2] Univ Heidelberg, Inst Phys Chem, D-69047 Heidelberg, Germany

[3] Univ Karlsruhe, Inst Anorgan Chem, D-76128 Karlsruhe, Germany

[4] Chalmers Univ, Dept Chem & Biol Engn, S-41296 Gothenburg, Sweden

[5] Inst Transuranium Elements, European Commiss, Joint Res Ctr, D-76125 Karlsruhe, Germany

来源：

DALTON TRANSACTIONS | 2010年 / 39卷 / 03期

关键词：

EXTRACTING AGENT; AMERICIUM(III); LANTHANIDES(III); ACTINIDES(III); SPECTROSCOPY; BIPYRIDINES; SEPARATION; MOLECULES; EFFICIENT; LIGANDS;

D O I：

10.1039/b919247f

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The complexation of Cm(III) and Eu(III) with 4-t-butyl-6,6'-bis-(5,6-diethyl-1,2,4-triazin-3-yl)-2,2'-bipyridine (t-Bu-C2-BTBP) in water/2-propanol solution is studied. With increasing ligand concentration, 1 : 2 complexes [M(t-Bu-C2-BTBP)(2)(H(2)O)](3+) form from the solvated metal ions. The stability constants are log K(Cm(III)) = 11.1 and log K(Eu(III)) = 9.0. For both Cm(III) and Eu(III), the complexation reaction is both enthalpy and entropy driven. Delta H(Cm(III)) is 11.7 kJ mol(-1) more negative than Delta H(Eu(III)), whereas the entropy difference is negligible. This is in good agreement with t-Bu-C2-BTBP's selectivity in liquid-liquid extraction.

引用

页码：923 / 929

页数：7

共 32 条

[1] [Anonymous], 1999, ACT FISS PROD PART T
[2] Chung KH, 1998, RADIOCHIM ACTA, V82, P215
[3] 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
Denecke, MA
Rossberg, A
Panak, PJ
Weigl, M
Schimmelpfennig, B
Geist, A
[J]. INORGANIC CHEMISTRY, 2005, 44 (23) : 8418 - 8425
[4] A comparative spectroscopic study of U(III)/Am(III) and Ln(III) complexed with N-donor ligands
Denecke, Melissa A.
Panak, Petra J.
Burdet, Fabien
Weigl, Michael
Geist, Andreas
Klenze, Reinhardt
Mazzanti, Marinella
Gompper, Klaus
[J]. COMPTES RENDUS CHIMIE, 2007, 10 (10-11) : 872 - 882
[5] Lanthanide(III) complexes of a highly efficient actinide(III) extracting agent - 2,6-bis(5,6-dipropyl-1,2,4-triazin-3-yl)pyridine
Drew, MGB
Guillaneux, D
Hudson, MJ
Iveson, PB
Russell, ML
Madic, C
[J]. INORGANIC CHEMISTRY COMMUNICATIONS, 2001, 4 (01) : 12 - 15
[6] Extraction behavior of nickel(II) using some of the BTBP-class ligands
Ekberg, C.
Dubois, I.
Fermvik, A.
Retegan, T.
Skarnemark, G.
Drew, M. G. B.
Foreman, M. R. S.
Hudson, M. J.
[J]. SOLVENT EXTRACTION AND ION EXCHANGE, 2007, 25 (05) : 603 - 617
[7] Spectroscopic evaluation of thermodynamics of trivalent actinides in brines
Fanghanel, T
Kim, JI
[J]. JOURNAL OF ALLOYS AND COMPOUNDS, 1998, 271 : 728 - 737
[8] Complexes formed between the quadridentate, heterocyclic molecules 6,6′-bis-(5,6-dialkyl-1,2,4-triazin-3-yl)-2,2′-bipyridine (BTBP) and lanthanides(III): Implications for the partitioning of actinides(III) and lanthanides(III)
School of Chemistry, University of Reading, Box 224, Reading, Berkshire, RG6 6AD, United Kingdom
不详
[J]. Dalton Trans., 2006, 13 (1645-1653):
[9] An investigation into the extraction of americium(III), lanthanides and D-block metals by 6,6′-bis-(5,6-dipentyl-[1,2,4]triazin-3-yl)-[2,2′]bipyridinyl(C5-BTBP)
Foreman, MRSJ
Hudson, MJ
Geist, A
Madic, C
Weigl, M
[J]. SOLVENT EXTRACTION AND ION EXCHANGE, 2005, 23 (05) : 645 - 662
[10] 6,6′-bis (5,5,8,8-tetramethyl-5,6,7,8-tetrahydro-benzo[1,2,4]triazin-3-yl) [2,2′]bipyridine, an effective extracting agent for the separation of americium(III) and curium(III) from the lanthanides
Geist, Andreas
Hill, Clement
Modolo, Giuseppe
Foreman, Mark R. St. J.
Weigl, Michael
Gompper, Klaus
Hudson, Michael J.
[J]. SOLVENT EXTRACTION AND ION EXCHANGE, 2006, 24 (04) : 463 - 483

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