Abstract
The photochemical reaction of magnesium tetraphenyl porphyrin (MgTPP) with sulfur dioxide (SO 2) was investigated in dichloromethane (CH 2Cl 2) by steady-state fluorescence, UV–vis absorption, MS, and XRD spectroscopic techniques. These spectra showed that under irradiation MgTPP reacted with SO 2 to form 1:1 molecular adduct at first step. During the process of keeping irradiation and maintaining the flow of SO 2, SO 2 was reduced into S 2− by MgTPP and the results were detected using MS and XRD techniques. Understanding the photochemical reaction of MgTPP with SO 2 is of key interest in elucidating fundamental photochemical reaction mechanisms associated with this class of chlorophyll in the presence of SO 2.
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