Protonation of some non-transition metal phthalocyanines – Spectral and photophysicochemical consequences

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dc.contributor.authorOgunsipe, A.O.
dc.contributor.authorIdowu, M.A.
dc.contributor.authorOgunbayo, T.B.
dc.contributor.authorAkinbulu, I.A.
dc.date.accessioned2019-09-05T16:21:19Z
dc.date.available2019-09-05T16:21:19Z
dc.date.issued2012-07
dc.description.abstractThe photophysics and photochemistry of phthalocyanine complexes of magnesium (MgPc), aluminum chloride (ClAlPc) and zinc (ZnPc) are studied in N,N′-dimethylformamide (DMF). The values obtained for the photophysical and photochemical parameters are normal for simple metallophthalocyanine (MPc) complexes. Protonation of the azomethine bridges reduced the photoactivities of the complexes considerably; however the excited triplet states of the protonated species are more stable towards ground state oxygen. The interaction of the non-protonated MPcs with ground state oxygen is shown to be diffusion-assisted, with bimolecular rate constant values of the order of 1010 M-1.s-1. MgPc could not be protonated; it was easily demetalated by the protonating acid. The kinetics of the demetalation yielded the rate equation: Rate = 0.1[MgPc][H+ ] 2/3.en_US
dc.identifier.citationOgunsipe, Abimbola & Idowu, Mopelola & Ogunbayo, Taofeek & Akinbulu, Adebayo. (2012). Protonation of some non-transition metal phthalocyanines — spectral and photophysicochemical consequences. Journal of Porphyrins and Phthalocyanines. 16. 10.1142/S1088424612500988.en_US
dc.identifier.urihttps://ir.unilag.edu.ng/handle/123456789/5311
dc.language.isoenen_US
dc.publisherJournal of Porphyrins and Phthalocyaninesen_US
dc.relation.ispartofseries;16: 885–894
dc.subjectphthalocyanineen_US
dc.subjectprotonationen_US
dc.subjectdemetalationen_US
dc.subjectphotophysicsen_US
dc.subjectoxygenen_US
dc.titleProtonation of some non-transition metal phthalocyanines – Spectral and photophysicochemical consequencesen_US
dc.typeArticleen_US
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