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Utilization of immobilized biomimetic iron complexes within nanoreactors of Al-MCM-41 as cyclohexane oxidation catalyst

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Title: Utilization of immobilized biomimetic iron complexes within nanoreactors of Al-MCM-41 as cyclohexane oxidation catalyst
Authors: Farzaneh, F.1 farzaneh@alzahra.ac.ir, Poorkhosravani, M.1,2, Ghandi, M.2
Source: Journal of Molecular Catalysis A: Chemistry. Aug2009, Vol. 308 Issue 1/2, p108-113. 6p.
Subjects: Metal complexes, Iron compounds, Biomimetic chemicals, Chemical reactors, Cyclohexane, Oxidation, Metal catalysts, Nanostructured materials
Abstract: Abstract: Biomimetic iron(III) complexes such as [Fe(en)2Cl2]Cl, [Fe(bpy)2Cl2]Cl, [Fe(salen)Cl], [Fe(TPP)Cl] and [Fe(TMC)Cl] in which en, bpy, salen, TMC, and TPP refer to ethylenediamine, 2,2′-bipyridine, N,N′-bis(salicylidene)ethylenediamine), 5,7,12,14-tetramethyl-1,4,8,11 tetraazacyclotetradeca 4,6,11,13-tetraene and meso-tetraphenylporphyrin were immobilized within nanoreactors of Al-MCM-41. The structures of immobilized complexes were characterized by powder X-ray diffraction (XRD), nitrogen adsorption–desorption, FTIR and UV–vis spectroscopy. The pore volume, surface area and pore diameter of Al-MCM-41 were found to decrease after immobilization of iron complexes. It was found that immobilized iron complexes within Al-MCM-41 with the order of [Fe(bpy)2Cl2]>[Fe(TPP)Cl]>[Fe(TMC)Cl]∼[Fe(salen)Cl]>[Fe(en)2Cl2]Cl catalyze the oxidation of cyclohexane to cyclohexanol and cyclohexanone with hydrogen peroxide in refluxing acetonitrile. [Copyright &y& Elsevier]
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Database: Engineering Source
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Abstract:Abstract: Biomimetic iron(III) complexes such as [Fe(en)2Cl2]Cl, [Fe(bpy)2Cl2]Cl, [Fe(salen)Cl], [Fe(TPP)Cl] and [Fe(TMC)Cl] in which en, bpy, salen, TMC, and TPP refer to ethylenediamine, 2,2′-bipyridine, N,N′-bis(salicylidene)ethylenediamine), 5,7,12,14-tetramethyl-1,4,8,11 tetraazacyclotetradeca 4,6,11,13-tetraene and meso-tetraphenylporphyrin were immobilized within nanoreactors of Al-MCM-41. The structures of immobilized complexes were characterized by powder X-ray diffraction (XRD), nitrogen adsorption–desorption, FTIR and UV–vis spectroscopy. The pore volume, surface area and pore diameter of Al-MCM-41 were found to decrease after immobilization of iron complexes. It was found that immobilized iron complexes within Al-MCM-41 with the order of [Fe(bpy)2Cl2]>[Fe(TPP)Cl]>[Fe(TMC)Cl]∼[Fe(salen)Cl]>[Fe(en)2Cl2]Cl catalyze the oxidation of cyclohexane to cyclohexanol and cyclohexanone with hydrogen peroxide in refluxing acetonitrile. [Copyright &y& Elsevier]
ISSN:13811169
DOI:10.1016/j.molcata.2009.03.039