Silica supported transition metal substituted polyoxotungstates: Novel heterogeneous catalysts in oxidative transformations with hydrogen peroxide

authors	Estrada, AC; Santos, ICMS; Simoes, MMQ; Neves, MGPMS; Cavaleiro, JAS; Cavaleiro, AMV
nationality	International
journal	APPLIED CATALYSIS A-GENERAL
author keywords	Oxidation; Hydrogen peroxide; Fe; Mn; Supported metal-substituted; polyoxometalates
keywords	KEGGIN-TYPE POLYOXOTUNGSTATES; AEROBIC OXIDATION; AMORPHOUS SILICA; SURFACE; TUNGSTOPHOSPHATES; CYCLOALKANES; CYCLOHEXANE; COMPLEXES; CHEMISTRY; ALDEHYDES
abstract	The preparation and characterization (FT-IR, FT-Raman, diffuse reflectance, elemental analysis) of novel catalysts with iron or manganese substituted polyoxotungstates [XM(III)(H(2)O)W(11)O(39)](n-) (X = P, M = Fe or Mn; X = Si or B, M = Fe) immobilized on a functionalized silica matrix are reported. The new materials were tested as heterogeneous catalysts in the oxidation of cis-cyclooctene and cyclooctane at 80 degrees C, using environmentally safe hydrogen peroxide as oxidant and acetonitrile as solvent. Some of these novel heterogeneous catalysts could be reused several times without appreciable loss of catalytic activity. (C) 2010 Elsevier B.V. All rights reserved.
publisher	ELSEVIER SCIENCE BV
issn	0926-860X
year published	2011
volume	392
issue	1-2
beginning page	28
ending page	35
digital object identifier (doi)	10.1016/j.apcata.2010.10.026
web of science category	Chemistry, Physical; Environmental Sciences
subject category	Chemistry; Environmental Sciences & Ecology
unique article identifier	WOS:000287265500004