Uranium halide complexes in ionic liquids: an electrochemical and structural study

M Deetlefs*, CL Hussey, TJ Mohammed, KR Seddon, JA van Den Berg, JA Zora

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

35 Citations (Scopus)

Abstract

The electrochemistry of the salts, [emim](2)[UBr6] and [emim](2)[UO2Br4] ([emim] = 1-ethyl-3-methylimidazolium), has been investigated in both a basic and an acidic bromoaluminate(III) ionic liquid. In the basic ionic liquid, the hexabromo salt undergoes a one-electron reversible reduction process at a stationary glassy carbon disc electrode, while the tetrabromodioxo salt was reduced to a uranium(IV) species by an irreversible two-electron process with the simultaneous transfer of oxide to the ionic liquid. On the other hand, dissolution of either of the salts in an acidic bromoaluminate( III) ionic liquid resulted in the formation of the same electroactive species. The solid state structures of the uranium chloride salts, [emim](2)[UCl6] and [emim](2)[UO2Cl4], have previously been reported, but have now been re-evaluated using a new statistical model developed in our group, to determine the presence or absence of weak hydrogen bonding interactions in the crystalline state.

Original languageEnglish
Pages (from-to)2334-2341
Number of pages8
JournalDalton Transactions
Issue number19
DOIs
Publication statusPublished - 2006

Keywords

  • TEMPERATURE MOLTEN-SALT
  • HYDROGEN-BOND
  • ELECTRICAL CONDUCTIVITIES
  • PHASE-TRANSITIONS
  • CHLORIDE
  • SPECTROSCOPY
  • STATE
  • MELTS
  • VISCOSITIES
  • CHEMISTRY

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