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TRLFS and EXAFS investigations of lanthanide and actinide complexation by triflate and perchlorate in an ionic liquid

Abstract : The solvation of the Eu-perchlorate (ClO4–) and triflate (CF3SO3–, OTf–) salts as well as of Cm(ClO4)3 and Am(ClO4)3 in the ionic liquid C4mimTf2N (1-butyl-3-methylimidazolium-bis(trifluoromethylsulfonyl)imide) has been comparatively investigated by application of laser fluorescence spectroscopy and X-ray absorption spectroscopy. Moreover, the ClO4–/OTf– ligand exchange reaction for the two actinide cations has been analyzed by the same spectroscopic techniques. A structural model for the different complexes was determined by the interpretation of the spectroscopic data. The lanthanide and the two actinide cations show the same coordination in C4mimTf2N. Moreover, a sequence for the strength of complexing ligands could be deduced from the spectroscopic data for the lanthanide and the two actinides: ClO4–>OTf–≥Tf2N–>H2O.
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Submitted on : Monday, February 25, 2008 - 3:10:07 PM
Last modification on : Tuesday, May 4, 2021 - 11:26:07 AM

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S. Stumpf, I. Billard, C. Gaillard, P.J. Panak, K. Dardenne. TRLFS and EXAFS investigations of lanthanide and actinide complexation by triflate and perchlorate in an ionic liquid. Radiochimica Acta, R Oldenbourg Verlag GMBH, 2008, 96, pp.1-10. ⟨10.1524/ract.2008.1461⟩. ⟨in2p3-00258813⟩

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