Molecular uranates - laser synthesis of uranium oxide anions in the gas phase [electronic resource].

Published:: Berkeley, Calif. : Lawrence Berkeley National Laboratory, 2009.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description:: 5,055 : digital, PDF file
Additional Creators:: Lawrence Berkeley National Laboratory and United States. Department of Energy. Office of Scientific and Technical Information

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Summary:

Laser ablation of solid UO₃ or (NH₄)₂U₂O₇ yielded in the gas phase molecular uranium oxide anions with compositions ranging from [UO{sub n}]⁻ (n = 2-4) to [U₁₄O{sub n}]⁻ (n = 32-35), as detected by Fourier transform ion cyclotron resonance mass spectrometry. The cluster series [UₓO{sub 3x}]⁻ for x ≤ 6 and various [UₓO{sub 3x-y}]⁻, in which y increased with increasing x, could be identified. A few anions with H atoms were also present, and their abundance increased when hydrated UO₃ was used in place of anhydrous UO₃. Collision-induced dissociation experiments with some of the lower m/z cluster anions supported extended structures in which neutral UO₃ constitutes the building block. Cationic uranium oxide clusters [UₓO{sub n}]⁺ (x = 2-9; n = 3-24) could also be produced and are briefly discussed. Common trends in the O/U ratios for both negative and positive clusters could be unveiled.

Report Numbers:

E 1.99:lbnl-3021e
lbnl-3021e

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Published through SciTech Connect.
12/14/2009.
"lbnl-3021e"
Inorganic Chemistry 48 12 ISSN 0020--1669; ISSN 1520--510X FT
Marcalo, Joaquim; Santos, Marta; Pires de Matos, Antonio; Gibson, John K.
Chemical Sciences Division

Funding Information:

DE-AC02-05CH11231

View MARC record | catkey: 14392540