TY - JOUR
T1 - Reactions of laser-ablated uranium atoms with H2O in excess argon
T2 - A matrix infrared and relativistic DFT investigation of uranium oxyhydrides
AU - Liang, Binyong
AU - Hunt, Rodney D.
AU - Kushto, Gary P.
AU - Andrews, Lester
AU - Li, Jun
AU - Bursten, Bruce E.
PY - 2005/4/7
Y1 - 2005/4/7
N2 - Laser-ablated U atoms react with H2O during condensation in excess argon. Infrared absorptions at 1416.3, 1377.1, and 859.4 cm-1 are assigned to symmetric H-U-H, antisymmetric H-U-H, and U=O stretching vibrations of the primary reaction product H2UO. Uranium monoxide, UO, also formed in the reaction, inserts into H2O to produce HUO(OH), which absorbs at 1370.5, 834.3, and 575.7 cm-1. The HUO(OH) uranium(IV) product undergoes ultraviolet photoisomerization to a more stable H2UO2 uranium(VI) molecule, which absorbs at 1406.4 and 885.9 cm-1. Several of these species, particularly H 2UO2, appear to form weak Ar-coordinated complexes. The predicted vibrational frequencies, relative absorption intensities, and isotopic shifts from relativistic DFT calculations are in good agreement with observed spectra, which further supports the identification of novel uranium oxyhydrides from matrix infrared spectra.
AB - Laser-ablated U atoms react with H2O during condensation in excess argon. Infrared absorptions at 1416.3, 1377.1, and 859.4 cm-1 are assigned to symmetric H-U-H, antisymmetric H-U-H, and U=O stretching vibrations of the primary reaction product H2UO. Uranium monoxide, UO, also formed in the reaction, inserts into H2O to produce HUO(OH), which absorbs at 1370.5, 834.3, and 575.7 cm-1. The HUO(OH) uranium(IV) product undergoes ultraviolet photoisomerization to a more stable H2UO2 uranium(VI) molecule, which absorbs at 1406.4 and 885.9 cm-1. Several of these species, particularly H 2UO2, appear to form weak Ar-coordinated complexes. The predicted vibrational frequencies, relative absorption intensities, and isotopic shifts from relativistic DFT calculations are in good agreement with observed spectra, which further supports the identification of novel uranium oxyhydrides from matrix infrared spectra.
UR - http://www.scopus.com/inward/record.url?scp=16244387179&partnerID=8YFLogxK
U2 - 10.1021/ic0483951
DO - 10.1021/ic0483951
M3 - Article
AN - SCOPUS:16244387179
SN - 0020-1669
VL - 44
SP - 2159
EP - 2168
JO - Inorganic Chemistry
JF - Inorganic Chemistry
IS - 7
ER -