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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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Wed, 2014-04-02 08:52 — Dr. Waheed J. Jondi
Journal Title, Volume, Page: 
Journal of Molecular Catalysis A: Chemical Volume 113, Issues 1–2, Pages 35–44
Year of Publication: 
1996
Link: 
http://www.sciencedirect.com/science/article/pii/S1381116996000556
Authors: 
Waheed Jondi
Department of Chemistry, Faculty of Science, An-Najah National University, Nablus, Palestine
Current Affiliation: 
Department of Chemistry, Faculty of Science, An-Najah National University, Nablus, Palestine
[email protected]
Hikmat S. Hilal
Department of Chemistry, Faculty of Science, An-Najah National University, Nablus, Palestine
Shukri Khalaf
Department of Chemistry, Faculty of Science, An-Najah National University, Nablus, Palestine
Afaq Keilani
Department of Chemistry, Faculty of Science, An-Najah National University, Nablus, Palestine
Mohammad Suleiman
Department of Chemistry, Faculty of Science, An-Najah National University, Nablus, Palestine
Mohammad Suleiman
Department of Chemistry, Faculty of Science, An-Najah National University, Nablus, Palestine
A.F. Schreiner
Department of Chemistry, North Carolina State University, Raleigh, NC 27695-8204, USA
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 1-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 1-octene oxidation as well, whereas the supported [SnIV(TPyP)]2+ was inactive for the oxidation of 1-octene.

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