Abstract
A new heterogeneous catalyst containing a copper(II) Schiff base complex covalently immobilized on the surface of silicaâcoated Fe3O4 nanoparticles (Fe3O4@SiO2âSchiff baseâCu(II)) was synthesized. Characterization of this catalyst was performed using various techniques. The catalytic potential of the catalyst was investigated for the oxidation of various alkenes (styrene, Îąâmethylstyrene, cyclooctene, cyclohexene and norbornene) and alcohols (benzyl alcohol, 3âmethoxybenzyl alcohol, 3âchlorobenzyl alcohol, benzhydrol and nâbutanol) using tertâbutyl hydroperoxide as oxidant. The catalytic investigations revealed that Fe3O4@SiO2âSchiff baseâCu(II) was especially efficient for the oxidation of norbornene and benzyl alcohol. The results showed that norbornene epoxide and benzoic acid were obtained with 100 and 87% selectivity, respectively. Moreover, simple magnetic recovery from the reaction mixture and reuse for several times with no significant loss in catalytic activity were other advantages of this catalyst
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