Investigation Of Homogenous Photosensitised Oxidation Activities Of Palldium 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
Abstract
Photosensitized oxidation of 4-nitrophenol was studied in organic solutions with seven octasubstituted thio and aryloxy palladium and platinum phthalocyanines acting as photosensitizers. Kinetic
studies conducted also showed that the complexes have different singlet oxygen quenching constants 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
Keywords
Photosensitization , Phthalocyanines , Oxidation , 4-Nitrophenol
Citation
Ogunbayo, Taofeek & Beukes, Edith & Nyokong, Tebello. (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. 334. 123-129. 10.1016/j.molcata.2010.11.008.