Investigation of homogeneous photosensitized oxidation activities of palladium and platinum octasubstituted phthalocyanines: Oxidation of 4-nitrophenol

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Date
2011-01
Authors
Ogunbayo, T.B.
Antunes, E.
Nyokong, T.
Journal Title
Journal ISSN
Volume Title
Publisher
Journal of Molecular Catalysis A: Chemical (ELSEVIER)
Abstract
Photosensitized oxidation of 4-nitrophenol was studied in organic solutions with seven octasubsti￾tuted thio and aryloxy palladium and platinum phthalocyanines acting as photosensitizers. Kinetic studies conducted also showed that the complexes have different singlet oxygen quenching con￾stants with direct implication on the quantum yield of photodegradation of 4-nitrophenol (˚4-NP). Palladium analogues gave better results than the platinum analogues in terms of ˚4-NP with palladium- (dodecylthio)phthalocyanine giving the highest yield of 1.8 × 10−3. Gas chromatography (GC) and liquid chromatography connected to a mass spectrometer (LC–MS) were used to confirm the photodegradation products which were hydroquinone and 1,4-benzoquinone.
Description
Staff Publications
Keywords
Photosensitization , Phthalocyanines , Oxidation , 4-Nitrophenol , Research Subject Categories::NATURAL SCIENCES::Chemistry
Citation
Ogunbayo, T.B, Antunes, E. and Nyokong, T (2011). Investigation of homogeneous photosensitized oxidation activities of palladium and platinum octasubstituted phthalocyanines: Oxidation of 4-nitrophenol. Journal of Molecular Catalysis A-chemical - J MOL CATAL A-CHEM. Vol.334. 123-129pp.