Comparison of two photosensitizers Al(III) phthalocyanine chloride tetrasulfonic acid and meso-tetrakis(4-sulfonatophenyl)porphyrin in the photooxidation of n-butylparaben

0364777 - ÚFCH JH 2012 RIV CH eng J - Journal Article
Gmurek, M. - Kubát, Pavel - Mosinger, Jiří - Miller, J. S.
Comparison of two photosensitizers Al(III) phthalocyanine chloride tetrasulfonic acid and meso-tetrakis(4-sulfonatophenyl)porphyrin in the photooxidation of n-butylparaben.
Journal of Photochemistry and Photobiology A-Chemistry. Roč. 223, č. 1 (2011), s. 50-56. ISSN 1010-6030. E-ISSN 1873-2666
Institutional research plan: CEZ:AV0Z40400503; CEZ:AV0Z40320502
Keywords : photosensitization * porphyrin * phthalocyanine
Subject RIV: CF - Physical ; Theoretical Chemistry
Impact factor: 2.421, year: 2011

A visible light-sensitized oxidation of endocrine disrupter–n-butylparaben (BP) in the presence of Al(III) phthalocyanine chloride tetrasulfonic acid and meso-tetrakis(4-sulfonatophenyl)porphyrin photosensitizers was studied. The major role of singlet oxygen in BP degradation was proved by the experiments performed in the presence of hydroxyl radicals scavengers and singlet oxygen quenchers. Direct interactions between BP and triplet state of both were investigated using time resolved technique. The rate constants of singlet oxygen quenching by BP in D2O buffer (pD 7, 9 and 10.8) for TPPS4 and AlPcS4 were determined. The efficiencies of BP photodegradation applying both photosensitizers were compared under various process parameters i.e. initial photosensitizer concentration, oxygen content and pH of reaction solution.
Permanent Link: http://hdl.handle.net/11104/0006567