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
Journal article, 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)

Author

S. Trumm

Karlsruhe Institute of Technology (KIT)

Heidelberg University

G. Lieser

Karlsruhe Institute of Technology (KIT)

Mark Foreman

Chalmers, Chemical and Biological Engineering, Nuclear Chemistry

P. J. Panak

Karlsruhe Institute of Technology (KIT)

Heidelberg University

A. Geist

Karlsruhe Institute of Technology (KIT)

T. Fanghanel

Heidelberg University

European Commission Joint Research Centre, Institute for Transuranium Elements Karlsruhe

Dalton Transactions

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

Vol. 39 3 923-929

Subject Categories

Inorganic Chemistry

DOI

10.1039/b919247f

More information

Latest update

4/20/2018