Abstract
An anionic iron(III) porphyrin was immobilized on a synthetic aluminosilicate obtained by the sol–gel process and used as catalyst in the oxidation of organic substrates. Aluminosilicate was prepared by modification of a method previously described in the literature, using an ethanol/water solution of AlCl 3·6H 2O and Si(OC 2H 5) 4 (TEOS). Iron(III) porphyrin immobilization was carried out using magnetic stirring and reflux, and a good immobilization rate (88%) was obtained. Immobilization of a neutral iron(III) porphyrin on the solid was also tested, without success. The obtained materials were characterized by ultraviolet–visible and infrared spectroscopies, X-ray diffraction, TGA analysis, nitrogen absorption, and electron paramagnetic resonance (EPR). The catalytic activity of the immobilized iron(III) porphyrin was evaluated in the oxidation of cyclooctene, cyclohexane, and n-heptane, using iodosylbenzene as the oxygen donor. The results obtained in the present study show that the novel immobilized catalyst is a promising system for efficient and selective oxidation reactions. Besides that, the stable interaction between the iron(III) porphyrin complex and the support enables reuse of the heterogeneous catalyst.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
More From: Colloids and Surfaces A: Physicochemical and Engineering Aspects
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.