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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Cyclooctene epoxidation using Nb-MCM-41 and Ti-MCM-41 synthesized at room temperature

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Author(s):
Gallo, Jean Marcel R. ; Schuchardt, Ulf Friedrich ; Paulino, Icaro Sampaio [3]
Total Authors: 3
Document type: Journal article
Source: APPLIED CATALYSIS A-GENERAL; v. 266, n. 2, p. 223-227, July 2004.
Field of knowledge: Physical Sciences and Mathematics - Chemistry
Abstract

An efficient and simple method for preparing titanium or niobium containing MCM-41 has been developed. The mesoporous materials were synthesized at room temperature using tetraethoxysilane (TEOS), cetyltrimethylammonium bromide (CTMABr) as template and (NH4)(2)TiF6 or NH4[NbO(C2O4)(2)(H2O)(2)].(H2O)(3) as metal source. The materials were characterized by X-ray diffraction (XRD),FT-IR and diffuse reflectance UV-Vis spectroscopies, which showed that most of the metal was incorporated into the framework of MCM-41. Ti and Nb containing MCM-41 were tested in the solvent-free epoxidation of cis-cyclooctene using tert-butyl hydroperoxide as oxidant and a catalyst: cyclooctene molar ratio of 1:1000. After 24h of reaction using Ti-MCM-41 and Nb-MCM-41 as catalyst, we obtained 82 and 65% yields of cyclooctene oxide, respectively, without formation of any by-products. (AU)