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Synthesis and Characterization of 5,10,15,20-Tetrakis(4-Tolyl)Porphyrin and its Tin and Cobalt Complexes: Investigation of their Photodynamic Properties in Degradation of Methylene Blue
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1  Department of Chemistry, Iran University of Science and Technology

Abstract: Porphyrins are 'the pigments of life', having a 2D 18 π-electron structure, and they play an important role in many biological processes such as substrate oxidation reactions, oxygen transport and photosynthesis.In present work the synthesis and characterized of 5,10,15,20-tetrakis(4-tolyl)porphyrin [H2TTP] and its metal complexes with tin and cobalt was investigated. H2TTP complex was characterized by UV-vis, FT-IR and H NMR spectra. The photodynamic degradation activity of this compound was investigated by destruction of methylene blue under visible light irradiation. H2TTP was prepared by refluxing pyrrole and 4-methylbenzaldehyde in propionic acid. The product was obtained by filteration and washed with DI. To prepare tin complex, H2TTP, SnCl2.2H2O and pyridine were refluxed for 6h at 120˚C. The complex was obtained with filtration.To prepare Cobalt complex, CoCl2.6H2O and H2TTP were dissolved in DMSO, followed by refluxing for 24 h. Then the product was purified by HCl and NaOH and was obtained by filtration and dried in vacuo. The photodegradation results showed that the synthesized porphyrin is able to absorb visible light and play as a light harvesting agent.
Keywords: Synthesis; Porphyrin; photodynamic degradation; Methylene blue