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|Title:||A TRLFS Study on the Complexation of CmIII and EuIII with 2,6-Bis(5,6-dipropyl-1,2,4-triazin-3-yl)pyridine in Water/Methanol Mixture|
|Authors:||TRUMM Sascha; PANAK P.; GEIST A.; FANGHAENEL Thomas|
|Citation:||EUROPEAN JOURNAL OF INORGANIC CHEMISTRY vol. 2010 no. 19 p. 3022-3028|
|Publisher:||WILEY-V C H VERLAG GMBH|
|Type:||Articles in periodicals and books|
|Abstract:||The complexation of Cm(III) and Eu(III) with bis-(5,6-dipropyl-1,2,4-triazin-3-yl)-2,6-pyridine (n Pr BTP) in water/methanol solution is studied. 1:3 complexes [M(n Pr-BTP)3]3+ form from the solvated metal ions upon addition of ligand. The stability constants are logKCm(III) = 14.4 and logKEu(III) = 11.9. For both metal ions the complexation reaction is both enthalpy and entropy driven ¿HCm(III) is 10.1 kJ/mol more negative than ¿HEu(III), whereas the entropy difference is small. The difference in ¿G between the formation of the Cm(III) and Eu(III) complexes is in good agreement with n Pr BTP's selectivity in liquid-liquid extraction.|
|JRC Directorate:||Nuclear Safety and Security|
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