Laser Induced Oxidation of Free Base Mesoporphyrin-Ix Dimethyl Ester Probed by Resonance Raman Technique |
Author(s): |
| H.H. Thanga , Mizoram University; J. Lalnunthari, Mizoram Univerity |
Keywords: |
| Mesoporphyrin-IX Dimethyl Ester Probed, Laser Induced Oxidation |
Abstract |
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Radicals of porphyrins and their metal derivatives serve as transient intermediates in a variety of biological redox processes. As a result there has been great interest in the preparation and characterization of the oxidized/reduced species of porphyrin complexes. The present work reports photochemical generation and resonance Raman characterization of free base mesoporphyrin- IX dimethyl ester (H2MP) ï°-cation radical in benzene under selective laser irradiation at 441.6 nm in the presence of CCl4 as electron acceptor. At low concentration of CCl4 (20% v/v), both one- and two-electron oxidation products, viz (H2MP) •+ radical and (H4MP)+2 diacid can be seen simultaneously from the RR spectrum. Higher concentration of the electron acceptor favours the formation of diacid (H4MP)+2. A reaction mechanism for the photo-oxidation process is proposed. |
Other Details |
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Paper ID: IJSRDV3I90305 Published in: Volume : 3, Issue : 9 Publication Date: 01/12/2015 Page(s): 421-422 |
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