SYNTHESIS AND CATALYTIC APPLICATIONS OF METALLOPORPHYRINS

Abstract

Porphyrins are having wide applications such as in catalysis, molecular sensors, photodynamic therapy and dye-sensitized solar cells (DSSC). Due to above-metioned applications, the porphyrin syntheses and their functionalization are quite important. Herein we have synthesized meso-tetraphenylporphyrinato oxovanadium [VO(IV)TPP] and meso-tetraphenylporphyrinato manganese(III) chloride [Mn(III)TPPC1]. Also we have utilised these porphyrins as catalyst for the oxidation of cyclohexene. We have done a systematic studies by varying reaction parameters (e.g.amount of oxidant, catalyst and solvent of the reaction mixture). We observed that cyclohexene requires least amount of vanadyl porphyrin catalyst for the reaction. Furhter we noticed that the increasing amount of H202 favoured the oxidation of cyclohexene. On the other hand, Mn(III)Cl porphyrin was found to be less effective for same reaction. These results suggest that vanadyl porphyrin as an efficient robust catalyst than that of Mn(III)Cl porphyrin for the oxidation of cyclohexene