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World Scientific Publishing, Journal of Porphyrins and Phthalocyanines, 03(09), p. 186-197

DOI: 10.1142/s1088424605000253

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Synthesis and photophysical properties of a covalently linked porphyrin-phthalocyanine conjugate

Journal article published in 2005 by Zhixin Zhao, Abimbola O. Ogunsipe, M. David Maree, Tebello Nyokong ORCID
This paper was not found in any repository, but could be made available legally by the author.
This paper was not found in any repository, but could be made available legally by the author.

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Abstract

The synthesis of a phthalocyanine-porphyrin heteropentamer (zinc(II) tetra(5-phenoxy-10,15,20-triphenylporphyrin)) zinc(II) phthalocyanine, ( ZnPc -( ZnTPP )4), containing four units of zinc tetraphenylporphyrin linked to a central zinc phthalocyanine macrocycle via an ether linkage is reported. The photophysical parameters of the pentamer are reported in toluene and dimethyl sulfoxide ( DMSO ). The observed differences in the fluorescence behavior of the pentamer in the two solvents is explained in terms of emission from different states; charge transfer state in DMSO and locally excited state in toluene. The rate constants for fluorescence, intersystem crossing, internal conversion, and of charge and energy transfer are reported for the pentamer. Quantum yields for fluorescence, internal conversion, triplet state and of charge and energy transfer are also reported for the pentamer, ZnPc -( ZnTPP )4 and the mixture of ZnPc and ZnTPP . The latter two parameters are higher in the pentamer compared to a mixture containing ZnPc and ZnTPP .