Electrolytic preparation, redox titration and stability of pentavalent state of uranyl tetraketonate in dimethyl sulfoxide

K. Shirasaki, T. Yamamura, Y. Shiokawa

Research output: Contribution to journalConference articlepeer-review

17 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)1296-1301
Number of pages6
JournalJournal of Alloys and Compounds
Volume408-412
DOIs
Publication statusPublished - 2006 Feb 9
EventProceedings of the Rare Earths'04 in Nara, Japan -
Duration: 2004 Nov 72004 Nov 12

Keywords

  • Half-life of uranyl(V)
  • Redox titration in aprotic solvents
  • Uranium redox-flow battery
  • Uranyl(V) acetylacetonate
  • Uranyl(V) tetraketonate

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

Fingerprint Dive into the research topics of 'Electrolytic preparation, redox titration and stability of pentavalent state of uranyl tetraketonate in dimethyl sulfoxide'. Together they form a unique fingerprint.

Cite this