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
Artikel i vetenskaplig tidskrift, 2010

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)(H2O)](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.

BIPYRIDINES

SEPARATION

ACTINIDES(III)

AMERICIUM(III)

LIGANDS

MOLECULES

EXTRACTING AGENT

EFFICIENT

SPECTROSCOPY

LANTHANIDES(III)

Författare

S. Trumm

Karlsruher Institut für Technologie (KIT)

Universität Heidelberg

G. Lieser

Karlsruher Institut für Technologie (KIT)

Mark Foreman

Chalmers, Kemi- och bioteknik, Kärnkemi

P. J. Panak

Karlsruher Institut für Technologie (KIT)

Universität Heidelberg

A. Geist

Karlsruher Institut für Technologie (KIT)

T. Fanghanel

Universität Heidelberg

European Commission Joint Research Centre, Institute for Transuranium Elements Karlsruhe

Dalton Transactions

1477-9226 (ISSN) 1477-9234 (eISSN)

Vol. 39 3 923-929

Ämneskategorier

Oorganisk kemi

DOI

10.1039/b919247f

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2018-04-20