Molecular uranates - laser synthesis of uranium oxide anions in the gas phase

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Laser ablation of solid UO{sub 3} or (NH{sub 4}){sub 2}U{sub 2}O{sub 7} yielded in the gas phase molecular uranium oxide anions with compositions ranging from [UO{sub n}]{sup -} (n = 2-4) to [U{sub 14}O{sub n}]{sup -} (n = 32-35), as detected by Fourier transform ion cyclotron resonance mass spectrometry. The cluster series [U{sub x}O{sub 3x}]{sup -} for x {le} 6 and various [U{sub x}O{sub 3x-y}]{sup -}, 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 UO{sub 3} was used in place of anhydrous UO{sub ... continued below

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Marcalo, Joaquim; Santos, Marta; Pires de Matos, Antonio & Gibson, John K December 14, 2009.

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Laser ablation of solid UO{sub 3} or (NH{sub 4}){sub 2}U{sub 2}O{sub 7} yielded in the gas phase molecular uranium oxide anions with compositions ranging from [UO{sub n}]{sup -} (n = 2-4) to [U{sub 14}O{sub n}]{sup -} (n = 32-35), as detected by Fourier transform ion cyclotron resonance mass spectrometry. The cluster series [U{sub x}O{sub 3x}]{sup -} for x {le} 6 and various [U{sub x}O{sub 3x-y}]{sup -}, 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 UO{sub 3} was used in place of anhydrous UO{sub 3}. Collision-induced dissociation experiments with some of the lower m/z cluster anions supported extended structures in which neutral UO{sub 3} constitutes the building block. Cationic uranium oxide clusters [U{sub x}O{sub n}]{sup +} (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.

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  • Journal Name: Inorganic Chemistry; Journal Volume: 48; Journal Issue: 12

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  • Report No.: LBNL-3021E
  • Grant Number: DE-AC02-05CH11231
  • DOI: 10.1021/ic9003998 | External Link
  • Office of Scientific & Technical Information Report Number: 1001078
  • Archival Resource Key: ark:/67531/metadc840522

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  • December 14, 2009

Added to The UNT Digital Library

  • May 19, 2016, 3:16 p.m.

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  • July 26, 2016, 5:52 p.m.

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Marcalo, Joaquim; Santos, Marta; Pires de Matos, Antonio & Gibson, John K. Molecular uranates - laser synthesis of uranium oxide anions in the gas phase, article, December 14, 2009; Berkeley, California. (digital.library.unt.edu/ark:/67531/metadc840522/: accessed November 12, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.