PW 11 ZnO 39 ] 5À was immobilized on activated carbon and characterized using Fourier transform infrared, X-ray diffraction, Brunauer-Emmett-Teller and elemental analysis techniques. Effective oxidation of various alcohols with hydrogen peroxide was performed in the presence of this catalyst. Easy separation of the catalyst from the reaction mixture, cheapness, high activity and selectivity, stability as well as retained activity in subsequent catalytic cycles make this supported catalyst suitable for smallscale synthesis.Additional supporting information may be found in the online version of this article at the publisher's web site.PW 11 Zn@AC-catalysed alcohol oxidation by H 2 O 2
The catalytic performance of tetra-n-butylammonium salts of Keggin and Wells-Dawson sandwich-type polyoxotungstates, [M 4 (PW 9 O 34 ) 2 ] mÀ and [M 4 (P 2 W 15 O 56 ) 2 ] nÀ (M = Mn 2+ , Fe 3+ , Co 2+ , Ni 2+ , Zn 2+ ), in the oxidation of cyclooctene and cyclohexene with 30% hydrogen peroxide under various conditions was investigated. In comparison, Wells-Dawson sandwich-type polyoxometalates were found to be less active than Keggin ones. In both of them, those containing Zn and Fe gave higher conversions for different oxidation conditions. These catalysts showed very good reusability in the oxidation reaction.
Preparation of CatalystsAccording to published procedures, Na 8 HPW 9 O 34 Á19H 2 O, Na 12 P 2 W 15 O 56 Á18H 2 O, [M 4 (PW 9 O 34 ) 2 ] mand [M 4 (P 2 W 15 O 56 ) 2 ] nÀ (M = Mn 2+ , Fe 3+ , Co 2+ , Ni 2+ , Zn 2+ ) salts were synthesized and confirmed using elemental analysis and infrared spectroscopy (see supporting information).
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.