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Electrochemical properties of uranium(VI) complexes with multidentate ligands in $$N,N$$-dimethylformamide

Kim, S.-Y.; Asakura, Toshihide; Morita, Yasuji  ; Ikeda, Yasuhisa*

The electrochemical reactions of UO$$_{2}$$($$beta$$-diketonato)$$_{2}$$DMF, UO$$_{2}$$(trop)$$_{2}$$DMF and UO$$_{2}$$(sap)(DMF)$$_{2}$$, (DMF = N,N-dimethylformamide, $$beta$$-diketonate = thenoyltrifluoroacetonate (ttfa), benzoyltrifluoroacetonate (btfa), and dibenzoylmethanate(dbm), trop = tropolonate, and sap = 2-salicylidenaminophenolate) complexes in DMF solution containing tetrabutyl ammonium perchlorate as a supporting electrolyte have been studied with cyclic voltammetry. These uranyl(VI) complexes were found to be quasi-reversibly reduced to U(V) species. The formal redox potentials (E$$^{o}$$, ${it vs}$. ferrocene/ferrocenium) for U(VI)/U(V) couples were determined to be -1.18 V for UO$$_{2}$$(ttfa)$$_{2}$$DMF, -1.18 V for UO$$_{2}$$(btfa)$$_{2}$$DMF, -1.46 V for UO$$_{2}$$ (dbm)$$_{2}$$DMF, -1.46 V for UO$$_{2}$$(trop)$$_{2}$$DMF, and -1.59 V for UO$$_{2}$$(sap)(DMF)$$_{2}$$.



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Category:Chemistry, Physical



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