期刊
CHEMISTRY-A EUROPEAN JOURNAL
卷 10, 期 21, 页码 5517-5523出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.200400217
关键词
mass spectrometry; organic-inorganic hybrid composites; organosilanes; polyoxometalates
In the field of functionalized polyoxometalates, organosilyl derivatives of polyoxotungstate constitute a special class of hybrid organic-inorganic system. The first organosilyl derivative of the monovacant Dawson heteropolyoxotungstate [alpha(2)-P2W17O61](10-) was obtained by three different methods. The use of two organosilanes as reagents enabled the preparation of the functionalized polyoxometalate [alpha(2)-P2W17O61(RSi)(2)O](6-) in good yield. Electrospray (ESI-MS) and matrix-assisted laser desorption ionization time-of-flight (MALDI-TOF) mass spectrometry, and W-183, P-31, and Si-29 NMR spectroscopy were used to characterize the composite systems. In several cases, ESI-MS analyses generated reduction processes which were compared to those related to [PMo11VO40](4-), the highly reducible Keggin polyoxometalate.
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