Visible and near-IR spectroscopic studies of UC1{sub 4} in a basic ambient temperature melt: The observation of a possible geometric distorted UC1{sub 6}{sup 2{minus}} species and the evidence for the hydrogen-bond in the melt

Conference · Thu Sep 01 04:00:00 EDT 1994

OSTI ID:10177667

Dai, S; Toth, L M; Del Cul, G D; Metcalf, D H

Since high temperatures can lead to broadening of absorption spectra, ambient temperature chloride melts were used; the system used was AlCl{sub 3}-1-ethyl-3-methyl-imidazolium chloride (EMIC). The uv-visible spectrum of UCl{sub 4} in basic melt had many peaks with the most intense (triplet) ones around 2000 nm, similar to these at high temperature and indicating the same species. The electronic transition is allowed by a static rather than a vibronic mechanism. The central peak in the UCl{sub 6}{sup 2-} spectrum indicates distortion of geometry from the O{sub h} symmetry by the solvent medium. Very strong hydrogen bonding between UCl{sub 6}{sup 2-} and solvent EMI is suggested.

• Research Organization: Oak Ridge National Lab., TN (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: AC05-84OR21400
• OSTI ID: 10177667
• Report Number(s): CONF-940529--24; ON: DE94017764
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
400201
400702
ABSORPTION SPECTRA
CHEMICAL AND PHYSICOCHEMICAL PROPERTIES
COMPLEXES
ENERGY-LEVEL TRANSITIONS
MOLTEN SALTS
ORGANIC COMPOUNDS
ORGANIC SOLVENTS
PROPERTIES OF RADIOACTIVE MATERIALS
URANIUM CHLORIDES
URANIUM COMPLEXES