CPL - Chalmers Publication Library
| Utbildning | Forskning | Styrkeområden | Om Chalmers | In English In English Ej inloggad.

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

S. Trumm ; G. Lieser ; Mark Foreman (Institutionen för kemi- och bioteknik, Kärnkemi) ; P. J. Panak ; A. Geist ; T. Fanghanel
Dalton Transactions (1477-9226). Vol. 39 (2010), 3, p. 923-929.
[Artikel, refereegranskad vetenskaplig]

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.

Nyckelord: EXTRACTING AGENT, AMERICIUM(III), LANTHANIDES(III), ACTINIDES(III), SPECTROSCOPY, BIPYRIDINES, SEPARATION, MOLECULES, EFFICIENT, LIGANDS



Denna post skapades 2011-01-21. Senast ändrad 2015-07-28.
CPL Pubid: 135783

 

Läs direkt!


Länk till annan sajt (kan kräva inloggning)


Institutioner (Chalmers)

Institutionen för kemi- och bioteknik, Kärnkemi (2005-2014)

Ämnesområden

Oorganisk kemi

Chalmers infrastruktur