The Catalytic Activity of Poly(Siloxane)-Supported Metalloporphyrins in Olefin Oxidation ‎Reactions: The Effect of The Support on the Catalytic Activity and Selectivity

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Journal Title, Volume, Page: 
Journal of Molecular Catalysis A: Chemical, Volume 113, Number 1, pp. 35-44(10)
Year of Publication: 
Khalaf, S.
Current Affiliation: 
Department of Chemistry, Faculty of Science, An-Najah National University, Nablus, Palestine
Jondi, W.
Hilal, H.S.
Keilani, A.
Suleiman, M.
Schreiner, A.F.
Preferred Abstract (Original): 
Supported tetra(-4-pyridyl)porphyrinato-manganese(III)[MnIII(TPyP)]+ and -tin(IV)[SnIV(TPyP)]2+ have been prepared. The solid support was iodonated poly(siloxane) surface prepared by condensation reactions of (EtO)4Si with (MeO)3Si(CH2)3I. The supported metalloporphyrins were employed as catalysts for the oxidation reactions of l-octene and of cyclohexene. NaBH4 was used to reduce [MnIII(TPyP)]+ and [SnIV(TPyP)]2+ back to their catalytically active MnII and SnII forms, respectively. Contrary to their homogeneous counterparts, both of the supported metalloporphyrins catalysed the cyclohexene oxidation reaction to yield only 2-cyclohexen-1-one with no other products over a reaction time of 10 h. In addition to cyclohexene oxidation, the supported [MnIII(TPyP)]+ catalysed l-octene oxidation as well, whereas the supported [SnIV(TPyP)]2+ was inactive for the oxidation of l-octene.

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