Solvent effects on the photochemical and fluorescence properties of zinc phthalocyanine derivatives

Ogunsipe, A. and Maree, D. and Nyokong, T. (2003) Solvent effects on the photochemical and fluorescence properties of zinc phthalocyanine derivatives. Journal of Molecular Structure, 650 (1/3). pp. 131-140. ISSN 0022-2860

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Official URL: http://dx.doi.org/10.1016/S0022-2860(03)00155-8

Abstract

The effects of solvents on the singlet oxygen, photobleaching and fluorescence quantum yields for zinc phthalocyanine (ZnPc) and its derivatives; (pyridino)zinc phthalocyanine ((py)ZnPc), zinc octaphenoxyphthalocyanine (ZnOPPc) and zinc octaestronephthalocyanine (ZnOEPc), is presented. The effects of the solvents on the ground state spectra are also discussed. The largest red shift of the Q band was observed in aromatic solvents, the highest shift being observed for 1-chloronaphthalene. Higher singlet fluorescence quantum yields were observed in THF for ZnPc and ZnOPPC. Also in the same solvent phototransformation rather than photobleaching was observed for ZnOPPc. Split Q band in the emission and excitation spectra of ZnOPPc was observed in some solvents and this is explained in terms of the lowering of symmetry following excitation.

Item Type:Article
Uncontrolled Keywords:Fluorecence; Photobleaching; Singlet oxygen; Zinc phthalocyanine
Subjects:Y Unknown > Subjects to be assigned
Divisions:Faculty > Faculty of Science > Chemistry
ID Code:1006
Deposited By: Mrs Eileen Shepherd
Deposited On:02 Jun 2008
Last Modified:06 Jan 2012 16:19
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