title: 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.
abstract: 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.
authors.affiliation: Departamento de Química, Universidade de Coimbra, 3004-535, Coimbra, Portugal.
authors.forename: Carlos J P
authors.initials: CJ
authors.lastname: Monteiro
authors.forename: Mariette M
authors.initials: MM
authors.lastname: Pereira
authors.forename: M Emilia
authors.initials: ME
authors.lastname: Azenha
authors.forename: Hugh D
authors.initials: HD
authors.lastname: Burrows
authors.forename: Carlos
authors.initials: C
authors.lastname: Serpa
authors.forename: Luis G
authors.initials: LG
authors.lastname: Arnaut
authors.forename: M J
authors.initials: MJ
authors.lastname: Tapia
authors.forename: Mohamed
authors.initials: M
authors.lastname: Sarakha
authors.forename: Pascal
authors.initials: P
authors.lastname: Wong-Wah-Chung
authors.forename: Suppiah
authors.initials: S
authors.lastname: Navaratnam