Electrochemical and spectroscopic investigations of uranium(III) with N,N,N′,N′-tetramethylmalonamide in DMF

Tomoo Yamamura, Kenji Shirasaki, Tokushin Ri, Y. Shiokawa

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

In order to investigate the electrode reaction of negative electrolyte, U(III)/U(IV), of the all-uranium redox-flow battery proposed by us, we investigated the magnetic susceptibility, spectroscopy and electrode reactions of U(III) and U(IV) complexes with N,N,N′,N′-tetramethylmalonamide (TMMA). The effective magnetic moment for the U(III) complex (1.95μB/atomU) is significantly smaller than the theoretical moment for free U3+ ion, and this may indicate the itinerant nature of U(III) due to the coordination of TMMA. In N,N-dimethylformamide (DMF), the energy levels due to f-f transitions was only slightly perturbed from those of uranium(III) perchlorate in DMF. The U(III)/U(IV) redox potential of U(III)-TMMA complex shifted negatively from that of uranium(III) perchlorate.

Original languageEnglish
Pages (from-to)139-144
Number of pages6
JournalJournal of Alloys and Compounds
Volume418
Issue number1-2
DOIs
Publication statusPublished - 2006 Jul 20

Keywords

  • Effective magnetic moment
  • Electrochemical investigation
  • N,N,N′,N′-Tetramethylmalonamide
  • Trivalent uranium
  • f-f Transition

ASJC Scopus subject areas

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

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