The effect of light on manganese porphyrin catalyzed oxidation of olefinswith periodate under different conditions

Most metal catalyzed oxidation of organic compounds with different terminal oxidants areconducted in air under exposure to sunlight or laboratory light [۱-۴]. However, little attentionwas paid to the possible influence of light and molecular oxygen on the efficiecy of the catalyticreactions. In the present study, the oxidation of cyclohexene with periodate catalyzed bymanganese porphyrins was studied in dark, under the irradiation of various LED lamps and in theabsence or presence of molecular oxygen to investigate the possible contribution of the excitedstates of manganese porphyrins and autoxidation [۵] pathway in the mechanism of the oxidationreaction. The results of this study shows a meaningful difference between the conversionsachieved under different reaction conditions, although no change in the product distribution wasobserved.

کلیدواژه ها:

Manganese porphyrins ، Oxidation of olefins ، Periodate ، Autoxidation conditions ، Light exposure.