Siloxane | An-Najah Staff

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

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) [Mn^III(TPyP)]⁺ and -tin(IV) [Sn^IV(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 [Mn^III(TPyP)]⁺ and [Sn^IV(TPyP)]²⁺ back to their catalytically active Mn^II and Sn^II 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 [Mn^III(TPyP)]⁺ catalysed 1-octene oxidation as well, whereas the supported [Sn^IV(TPyP)]²⁺ was inactive for the oxidation of 1-octene.

see te full file here

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

Mon, 2014-03-24 14:44 — Shukri Mohammed Khalaf

Journal Title, Volume, Page:

Journal of Molecular Catalysis A: Chemical, Volume 113, Number 1, pp. 35-44(10)

Year of Publication:

1996

Link:

http://www.ingentaconnect.com/content/els/13811169/1996/00000113/00000001/art000...

Authors:

Khalaf, S.

Current Affiliation:

Department of Chemistry, Faculty of Science, An-Najah National University, Nablus, Palestine

[email protected]

Jondi, W.

Hilal, H.S.

Keilani, A.

Suleiman, M.

Schreiner, A.F.

Preferred Abstract (Original):

Supported tetra(-4-pyridyl)porphyrinato-manganese(III)[Mn^III(TPyP)]⁺ and -tin(IV)[Sn^IV(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 [Mn^III(TPyP)]⁺ and [Sn^IV(TPyP)]²⁺ back to their catalytically active Mn^II and Sn^II 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 [Mn^III(TPyP)]⁺ catalysed l-octene oxidation as well, whereas the supported [Sn^IV(TPyP)]²⁺ was inactive for the oxidation of l-octene.

see the full file here

The catalytic activity of poly(siloxane)-supported metalloporphyrins in olefin oxidation reactions: the effect of the support on the catalytic activity and selectivity

Wed, 2010-04-21 14:32 — Hikmat S. Hilal, D.Sc.

Journal Title, Volume, Page:

Journal of Molecular Catalysis A: Chemical Volume 113, Issues 1-2, 25 November 1996, Pages 35-44

Year of Publication:

1996

Link:

http://www.sciencedirect.com/science/article/pii/S1381116996000556

Authors:

Hikmat S. Hilal

Department of Chemistry, An-Najah N. University, Nablus, PO Box 7, West Bank, Palestine

Current Affiliation:

Department of Chemistry, An-Najah N. University, Nablus, PO Box 7, West Bank, Palestine

[email protected]

Waheed Jondi

Department of Chemistry, An-Najah N. University, Nablus, PO Box 7, West Bank, Palestine

Shukri Khalaf

Department of Chemistry, An-Najah N. University, Nablus, PO Box 7, West Bank, Palestine

Afaq Keilani

Department of Chemistry, An-Najah N. University, Nablus, PO Box 7, West Bank, Palestine

Mohammad Suleiman

Department of Chemistry, An-Najah N. University, Nablus, PO Box 7, West Bank, 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.