Photochemical & photobiological sciences : Official journal of the European Photochemistry Association and the European Society for Photobiology · 2005
A comparative study of water soluble 5,10,15,20-tetrakis(2,6-dichloro-3-sulfophenyl)porphyrin and its metal complexes as efficient sensitizers for photodegradation of phenols.
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Monteiro Carlos J P, Pereira Mariette M, Azenha M Emilia, Burrows Hugh D, Serpa Carlos, Arnaut Luis G, Tapia M J, Sarakha Mohamed, Wong-Wah-Chung Pascal, Navaratnam Suppiah
Аннотация
5,10,15,20-Tetrakis(2,6-dichloro-3-chlorosulfophenyl)porphyrin and its tin and zinc complexes were synthesized with high yields and fully characterized. The corresponding water-soluble 5,10,15,20-tetrakis(2,6-dichloro-3-sulfophenyl)porphyrins were obtained by hydrolysis with water. An extensive photophysical study of the new water soluble porphyrinic compounds was carried out including absorption and fluorescence spectra, fluorescence quantum yields, triplet absorption spectra, triplet lifetimes, triplet and singlet oxygen quantum yields. These sensitizers were successfully used in the photodegradation of 4-chlorophenol and 2,6-dimethylphenol. A comparison is made of their efficiencies, and some mechanistic considerations are highlighted.