Polystyrenic porphyrins as catalysts for alkane oxidation
We report herein the catalytic effect of metalloporphyrins (MnP–PS, CoP–PS, ZnP–PS) covalently bonded with one or four arms of polystyrene. These metalloporphyrins were employed as active catalysts for oxidation of ethylbenzene in the presence of freshly prepared O2. Our results show that one-arm polystyrenic porphyrins demonstrate enhanced catalytic efficiency, with better yield as compared with four-arm polystyrenic porphyrins. In addition, the catalytic efficiencies of the studied metalloporphyrins, calculated from gas chromatography–mass spectrometry (GC–MS) analysis, were found to be dependent on the central metal in the order Mn > Co > Zn. We also found that these catalysts have advantages of higher stability, facile separation, and good recyclability with comparable efficiencies.
KeywordsMetalloporphyrins Polystyrene Catalyst Ethylbenzene
- 3.M. Giuseppe, D.S. Roberta, V. Giuseppe, G. Elisa, P. Leonardo, J. Li, S. Rudolf, D. Garbiela, TiO2-based photocatalysts impregnated with metallo-porphyrins employed for degradation of 4-nitrophenol in aqueous solutions: role of metal and macrocycle. Res. Chem. Intermed. 33, 433–448 (2013)Google Scholar
- 9.H.W. Jiang, Q.Y. Chen, J.C. Xiao, Y.C. Gu, The oxidation of Ni(II) N-confused porphyrins (NCPs) with azo radical initiators and an unexpected intramolecular nucleophilic substitution reaction via a proposed Ni(III) NCP intermediate. Chem. Commun. 3732–3734 (2009). doi: 10.1039/b904615a
- 10.Q.Z. Ren, Y. Yao, X.J. Ding, Z.S. Hou, D.Y. Yan, Phase-transfer of porphyrins by polypeptide-containing hyperbranched polymers and a novel iron(III) porphyrin biomimetic catalyst. Chem. Commun. 4732–4734 (2009). doi: 10.1039/b904199k