TY - JOUR
T1 - Electrolytic preparation, redox titration and stability of pentavalent state of uranyl tetraketonate in dimethyl sulfoxide
AU - Shirasaki, K.
AU - Yamamura, T.
AU - Shiokawa, Y.
PY - 2006/2/9
Y1 - 2006/2/9
N2 - Uranyl(VI) complex with tetraketone ligand, m-bis(2,4-dioxo-l-pentyl)benzene, which possesses two monomer acetylacetone moieties was synthesized. Cyclic voltammetric study on U(VI)/U(V) couple revealed that this electrode reaction is simple reversible reaction on glassy carbon (GC) electrode in dimethyl sulfoxide (DMSO). Electrolytic preparation of DMSO solution of uranyl(V) tetraketonate was carried out starting from the corresponding uranyl(VI) complex by using a flow electrolysis system. New redox titration method using bis(cyclopentadienyl)iron(III) hexafluorophosphate (FcPF6) was developed and used for quantitative analysis of uranyl(V). Titration curve of uranyl(V) tetraketonate was explained by a simple oxidation by FcPF6, in contrast to the result of uranyl(V) acetylacetonate. Half-life of the uranyl(V) tetraketonate was determined by spectrophotometry as 3.7 h, which is much longer than 1.5 h of uranyl(V) acetylacetonate.
AB - Uranyl(VI) complex with tetraketone ligand, m-bis(2,4-dioxo-l-pentyl)benzene, which possesses two monomer acetylacetone moieties was synthesized. Cyclic voltammetric study on U(VI)/U(V) couple revealed that this electrode reaction is simple reversible reaction on glassy carbon (GC) electrode in dimethyl sulfoxide (DMSO). Electrolytic preparation of DMSO solution of uranyl(V) tetraketonate was carried out starting from the corresponding uranyl(VI) complex by using a flow electrolysis system. New redox titration method using bis(cyclopentadienyl)iron(III) hexafluorophosphate (FcPF6) was developed and used for quantitative analysis of uranyl(V). Titration curve of uranyl(V) tetraketonate was explained by a simple oxidation by FcPF6, in contrast to the result of uranyl(V) acetylacetonate. Half-life of the uranyl(V) tetraketonate was determined by spectrophotometry as 3.7 h, which is much longer than 1.5 h of uranyl(V) acetylacetonate.
KW - Half-life of uranyl(V)
KW - Redox titration in aprotic solvents
KW - Uranium redox-flow battery
KW - Uranyl(V) acetylacetonate
KW - Uranyl(V) tetraketonate
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U2 - 10.1016/j.jallcom.2005.04.124
DO - 10.1016/j.jallcom.2005.04.124
M3 - Conference article
AN - SCOPUS:31144459283
SN - 0925-8388
VL - 408-412
SP - 1296
EP - 1301
JO - Journal of Alloys and Compounds
JF - Journal of Alloys and Compounds
T2 - Proceedings of the Rare Earths'04 in Nara, Japan
Y2 - 7 November 2004 through 12 November 2004
ER -