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