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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

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 co...

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Bibliographic Details
Main Authors: Trumm, Sascha (Author) , Lieser, Georg (Author) , Foreman, Mark R. S. J. (Author) , Panak, Petra (Author) , Geist, Andreas (Author) , Fanghänel, Thomas (Author)
Format: Article (Journal)
Language:English
Published: 2010
In: Dalton transactions
Year: 2010, Volume: 39, Issue: 3, Pages: 923-929
ISSN:1477-9234
DOI:10.1039/B919247F
Online Access:Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1039/B919247F
Verlag, lizenzpflichtig, Volltext: https://pubs.rsc.org/en/content/articlelanding/2010/dt/b919247f
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Author Notes:Sascha Trumm, Georg Lieser, Mark R.S.J. Foreman, Petra J. Panak, Andreas Geist, and Thomas Fanghänel
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Summary: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 KCm(III) = 11.1 and log KEu(III) = 9.0. For both Cm(III) and Eu(III), the complexation reaction is both enthalpy and entropy driven. ΔHCm(III) is 11.7 kJ mol−1 more negative than ΔHEu(III), whereas the entropy difference is negligible. This is in good agreement with t-Bu-C2-BTBP's selectivity in liquid-liquid extraction.
Item Description:Erstmals am 20th November 2009 online veröffentlicht
Gesehen am 19.01.2024
Physical Description:Online Resource
ISSN:1477-9234
DOI:10.1039/B919247F

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