Papacidero, A. T.Rocha, L. A.Caetano, B. L.Molina, E.Sacco, W. C.Nassar, E. J.Martinelli, Y.Mello, C.Nakagaki, S.Ciuffi, K. J.2014-05-202014-05-202006-03-01Colloids and Surfaces A-physicochemical and Engineering Aspects. Amsterdam: Elsevier B.V., v. 275, n. 1-3, p. 27-35, 2006.0927-7757http://hdl.handle.net/11449/33976This work describes the synthesis of a first-generation iron porphyrin catalyst entrapped in a silica matrix by the sol-gel route, leading to spherical particles. The catalyst was synthesized by the method of Stober, through hydrolysis and condensation of the alkoxysilane TEOS in a mixture of alcohol, water and ammonia, in the presence of the iron porphyrin Fe(TPP)Cl. The relation between particle morphology and catalytic activity of the different Fe(TPP)-SiO2, obtained using different H2O/silane molar ratios and ammonia concentrations in the xerogel syntheses, was studied.The obtained catalysts were characterized by UV-vis spectroscopy, NMR Si-29. thermogravimetric analysis and transmission electron microscopy. Their ability to catalyze (Z)-cyclooctene epoxidation and cyclohexane oxidation was tested using iodosylbenzene as oxygen donor; the oxidation products were analyzed by gas chromatography and the catalysts obtained in a form of particles spherical and monodispersed showed to be a promising catalytic system for selective oxidation. (c) 2005 Elsevier B.V. All rights reserved.27-35engsol-geliron porphyrinspherical particlessupported catalystcatalysisoxidationsilicaArtigo10.1016/j.colsurfa.2005.09.013WOS:000235523100004Acesso restrito