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|Title:||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 water/2 propanol mixture|
|Authors:||TRUMM Sascha; LIESER Georg; PANAK P.j.; GEIST A.; FANGHAENEL Thomas; FOREMAN Mark R. S. J.|
|Citation:||DALTON TRANSACTIONS vol. 2010 no. 39 p. 923–929|
|Publisher:||ROYAL SOC CHEMISTRY|
|Type:||Articles in Journals|
|Abstract:||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 logKCm(III) = 11.1 and logKEu(III) = 9.0. For both Cm(III) and Eu(III), the complexation reaction is both enthalpy and entropy driven. ¿HCm(III) is 11.7 kJ/mol more negative than ¿HEu(III), whereas the entropy difference is negligible. This is in good agreement with t-Bu-C2-BTBP's selectivity in liquid-liquid extraction.|
|JRC Institute:||Institute for Transuranium Elements|
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