A convenient preparation of polymer-supported manganese porphyrin and its use as hydrocarbon monooxygenation catalyst

Tangestaninejad, Shahram; Habibi, M.H.; Mirkhani, Valiollah

doi:10.1016/j.molcata.2004.03.001

Cited by 77 publications

(4 citation statements)

References 19 publications

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“…In the last two decades, oxidation of hydrocarbons catalyzed by metalloporphyrins under mild conditions has attracted much interest because of their potential application and the environmentally friendly conditions [21][22][23][24][25][26][27]. A large class of synthetic metalloporphyrins was used as catalysts for the oxidation of saturated C-H bond, C-C double bonds and aromatics [28][29][30][31][32][33][34][35]. Our group has reported that metalloporphyrins could catalyze effectively the oxidation of cyclohexane [36] and toluene [37] with air in the absence of any cocatalysts and reductant.…”

Section: Introductionmentioning

confidence: 99%

Catalysis of metalloporphyrins for selective hydroxylation of phenol by H₂O₂

Zeng

Jiang

Zhu

et al. 2006

J. Porphyrins Phthalocyanines

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Liquid phase catalytic selective hydroxylation of phenol to catechol and hydroquinone was carried out in the presence of metalloporphyrins using hydrogen peroxide as oxidant and water as solvent. Five kinds of metal tetra(p-chlorophenyl)porphrin (T(p-Cl)PPMCl, M = Fe, Co, Mn, Cu, Zn) were studied. It was found that T(p-Cl)PPFeCl had high catalytic activity and diphenol selectivity for the hydroxylation of phenol to catechol and hydroquinone. The influence of various reaction parameters, namely, reaction temperature, solvent, ratio of substrate and oxidant, substrate concentration, the amount of catalyst, reaction time and pH value were investigated systematically. When water was used as solvent (10 mL), the optimum conditions were following: pH = 7, the concentration of phenol was 0.3 g/mL, the molar ratio of phenol and H 2 O 2 was 1/2, the molar ratio of catalyst and phenol was 7/100000, the reaction temperature was 65 °C and the reaction time was 1.5 h. Under above optimum conditions, the phenol conversion was up to 55.1%, and the selectivity of diphenol was almost up to 99.9%, the molar turnover numbers of the catalyst was about 7500. A possible mechanism was also proposed.

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Section: Introductionmentioning

confidence: 99%

Catalysis of metalloporphyrins for selective hydroxylation of phenol by H₂O₂

Zeng

Jiang

Zhu

et al. 2006

J. Porphyrins Phthalocyanines

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show abstract

“…72 Other cytochrome P450-biomimetic chemical systems (generally based on metalloporphyrins) capable of carrying out alkane hydroxylation and alkene epoxidation have also been reported. 73,74 In the specific case of terpenes, Skrobot et al 75 showed the production of epoxides from these compounds. In an analogous work, the oxidation of monoterpenes by hydrogen peroxide catalyzed by porphyrins was also described.…”

Section: Chemical Transformationsmentioning

confidence: 99%

Bio-oxidation of Terpenes: An Approach for the Flavor Industry

2009

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“…Meanwhile their catalytic activities were dramatically enhanced by halogen substitutions in the conjugated porphyrin planes [5][6][7][8]. Recently, porphyrin molecules were anchored on the surfaces of silica and polymer for easy separation from the catalytic systems [9,10]. Furthermore, cobalt porphyrin molecules supported on pyrolysed carbon exhibited high activity in catalytic conversion from hydrogen sulfides to S 8 circle molecules [11].…”

Section: Introductionmentioning

confidence: 99%