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New Organosilyl Derivatives of the Dawson Polyoxometalate [α 2 ‐P 2 W 17 O 61 (RSi) 2 O] 6− : Synthesis and Mass Spectrometric Investigation
Author(s) -
Mayer Cédric R,
RochMarchal Catherine,
Lavanant Hélène,
Thouvenot René,
Sellier Nicole,
Blais JeanClaude,
Sécheresse Francis
Publication year - 2004
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.200400217
Subject(s) - polyoxometalate , chemistry , yield (engineering) , electrospray ionization , mass spectrometry , reagent , spectroscopy , desorption , nuclear chemistry , analytical chemistry (journal) , organic chemistry , materials science , catalysis , chromatography , physics , adsorption , quantum mechanics , metallurgy
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 [α 2 ‐P 2 W 17 O 61 ] 10− was obtained by three different methods. The use of two organosilanes as reagents enabled the preparation of the functionalized polyoxometalate [α 2 ‐P 2 W 17 O 61 (RSi) 2 O] 6− in good yield. Electrospray (ESI‐MS) and matrix‐assisted laser desorption ionization time‐of‐flight (MALDI‐TOF) mass spectrometry, and 183 W, 31 P, and 29 Si 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 [PMo 11 VO 40 ] 4− , the highly reducible Keggin polyoxometalate.