Catalytic activity of Fe (III) porphyrin supported on carbon nanotubes on the oxidation of sulfides with UHP

In the present research meso-tetrakis(4-hydroxyphenyl)porphyrinatoiron(III) chloride supported on multiwalledcarbon nanotubes has been prepared and characterized by IR, SEM and atomic absorption spectroscopy. Catalyticoxidation of sulfides with urea hydrogen peroxide (UHP) at room temperature was studied. The effect of the differentreaction parameters such as reaction time, solvent, amount of oxidant,oxidant activator and co-catalyst on the oxidationof methyl phenyl sulfide was studied. After optimization of reaction conditions 100% conversion with 100% selectivityfor sulfoxide product in the presence of Fe-catalyst were obtained. Reusability of the heterogeneous catalyst wasinvestigated and the recycled catalyst keep constant of conversion yield up to 66% after five cycles. Mild conditions,high conversion, recyclable catalyst and chemo-selective oxidation of methyl phenyl sulfide are advantages of thiscatalytic system.

کلیدواژه ها:

Sulfide ، heterogeneous catalyst ، carbon nanotubes ، iron porphyrin