Title: Exploring the solution behavior of f-element coordination compounds: a case study on some trivalent rare earth and plutonium complexes
Authors: LÖBLE MatthiasONA-BURGOS PascualFERNANDEZ IgnacioAPOSTOLIDIS ChristosMORGENSTERN AlfredWALTER OlafBRUCHERTSEIFER FrankKADEN PeterVITOVA T.ROTHE J.DARDENNE K.BANIK Nidhu LalGEIST A.DENECKE M. A.BREHER Frank
Citation: CHEMICAL SCIENCE vol. 4 p. 3717 - 3724
Publisher: ROYAL SOC CHEMISTRY
Publication Year: 2013
JRC N°: JRC82736
ISSN: 2041-6520
URI: www.rsc.org/chemicalscience
http://publications.jrc.ec.europa.eu/repository/handle/JRC82736
DOI: 10.1039/c3sc50708d
Type: Articles in periodicals and books
Abstract: Several rare earth coordination compounds and the first actinide coordination compound of the recently introduced multifunctional ligand (S)P[N(Me)N]C(H)Py]3 (1, Py ¼ pyridyl) have been synthesized and characterized. The electronic and structural properties of these complexes were probed by X-ray diffraction analysis, X-ray absorption fine structure (XAFS), and advanced nuclear magnetic resonance (NMR) spectroscopy. Pulsed field-gradient spin-echo (PGSE) diffusion measurements and 1H,19F heteronuclear Overhauser spectroscopy (HOESY) revealed that the degree of ion pairing of the trivalent rare earth complexes [Ln(1)(OTf)3] (Ln ¼ Y (2), La (3), Sm (4), and Lu (5); [OTf] ¼ [O3SCF3]) depends on their metal cation ionic radii and decreases in acetonitrile solution for the smaller lanthanides. The plutonium(III) complex 6 exhibits, however, a significantly different behavior in solution and has a much stronger tendency to form solvent-separated ion pairs.
JRC Directorate:Nuclear Safety and Security

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