Spectroscopy and electrochemistry of U(IV)/U(III) in basic aluminum chloride-1-ethyl-3-methylimidazolium chloride

Journal Article · Wed Oct 16 04:00:00 EDT 1991 · Inorganic Chemistry; (United States)

DOI:https://doi.org/10.1021/ic00021a009· OSTI ID:6836032

Anderson, C J; Deakin, M R; Choppin, G R ^[1]; D'Olieslager, W; Heerman, L ^[2]; Pruett, D J ^[3]

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1. Florida State Univ., Tallahassee (United States)
2. Katholieke Univ., Leuven (Belgium)
3. Oak Ridge National Lab., TN (United States)

The redox chemistry of UCl[sub 4] has been investigated in the solvent AlCl[sub 3]-1-ethyl-3-methylimidazolium chloride (AlCl[sub 3]-EMIC), a room-temperature ionic liquid. In basic solutions ([lt]50 mol % AlCl[sub 3]) the reduction of U(IV) to U(III) on glassy carbon electrodes is reversible. Visible/near-IR spectroscopic data and potentiometric measurements for U(IV)/U(III) as a function of the basic composition of AlCl[sub 3]-EMIC indicate U(IV) and U(III) are both hexachloro anions. Diffusion coefficients were measured for the U(IV) and U(III) complexes by two methods. The values are comparable to those of transition-metal hexachloro anionic complexes in the same solvent, supporting the assignment of [UCl[sub 6]][sup 2[minus]] and [UCl[sub 6]][sup 3[minus]].

• DOE Contract Number: AC05-84OR21400
• OSTI ID: 6836032
• Journal Information: Inorganic Chemistry; (United States), Journal Name: Inorganic Chemistry; (United States) Vol. 30:21; ISSN 0020-1669; ISSN INOCAJ
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
400400 -- Electrochemistry
400702* -- Radiochemistry & Nuclear Chemistry-- Properties of Radioactive Materials
ABSORPTION SPECTROSCOPY
ACTINIDE COMPOUNDS
ALUMINIUM CHLORIDES
ALUMINIUM COMPOUNDS
BASES
CHARGED PARTICLES
CHEMICAL REACTIONS
CHLORIDES
CHLORINE COMPOUNDS
DIFFUSION
HALIDES
HALOGEN COMPOUNDS
INFRARED SPECTRA
IONS
LEWIS BASES
REDOX REACTIONS
REDUCTION
SOLVENT PROPERTIES
SPECTRA
SPECTROSCOPY
URANIUM CHLORIDES
URANIUM COMPOUNDS
VALENCE
VISIBLE SPECTRA