Synthesis and Characterization of Tetrakis (4-sulfunatophenyl) Porphyrin-Mn(III) Chloride Complex and Study of the Catalytic Activity of the Complex in Homogeneous and Heterogeneous Catalytic Systems for Epoxidation of Olefins

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Golbaghi, Golara | 2014

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Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 46133 (03)
University: Sharif University of Technology
Department: Chemistry
Advisor(s): Bagherzadeh, Mojtaba; Mohammadi Boghaei, Davar
Abstract:
Epoxidation of alkenes by Mn(III)meso-tetra(4-sulfonatophenyl)porphyrin chloride (MnTPPS4Cl) in the various homogeneous and heterogeneous catalytic systems was investigated. In the case of homogeneous catalysis, epoxidation of cyclooctene in CH2Cl2/MeOH mixture using urea hydrogen peroxide (UHP) as an oxidant and imidazole as a co-catalyst results in the formation of cycloocetene oxide in 87% yield. Using this catalytic system various alkenes successfully oxidized to their corresponding epoxide in high conversions and selectivity. Cyclic alkenes oxidized more easily than linear alkenes. In addition, epoxidation of alkenes was investigated in the heterogeneous catalytic systems. For this purpose, the MnTPPS4complex immobilized on the poly(3-aminopropyl)siloxane hydrochloride (PAPS-Cl) support. The heterogeneous catalyst showed acceptable reactivity and good reusability in alkene epoxidation, without significant loss of activity within successive runs
Keywords:
Heterogeneous Catalysis ; Olefins Epoxidation ; Manganese-Porphyrin Complexes ; Homogeneous Catalyst