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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
chemical engineering
Syntheses and photophysics of new phthalocyanine derivatives of zinc, cadmium and mercury
New Journal of Chemistry, Volume 31, No. 3, Year 2007
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Description
The syntheses of novel tetra{2,(3)-pyridyloxyphthalocyaninato} complexes of zinc, cadmium and mercury (TPyZnPc, TPyCdPc and TPyHgPc) are presented. Their spectral and photophysical properties (as well as those of their unsubstituted counterparts: ZnPc, CdPc and HgPc) are investigated. TPyZnPc and TPyCdPc are aggregated in non-coordinating solvents such as chloroform, while TPyHgPc is demetallated, as evident from their respective absorption spectra. The trends in fluorescence (ΦF), triplet (ΦT) and singlet oxygen (ΦΔ) quantum yields are explained in terms of relative strengths of spin-orbit coupling induced by the respective central metal ions in the complexes. The effect of the pyridyloxy substituents is a decrease in ΦF and an increase in ΦT values. The complexes are less fluorescent in DMSO but possess higher ΦT, triplet lifetimes (τT) and ΦΔ therein. © The Royal Society of Chemistry and the Centre National de la Recherche Scientifique.
Authors & Co-Authors
Chidawanyika, Wadzanai J.U.
South Africa, Grahamstown
Rhodes University
Ogunsipe, Abimbola O.
South Africa, Grahamstown
Rhodes University
Nigeria, Lagos
University of Lagos
Nyokong, Tebello
South Africa, Grahamstown
Rhodes University
Statistics
Citations: 52
Authors: 3
Affiliations: 2
Identifiers
Doi:
10.1039/b615663k
ISSN:
11440546
e-ISSN:
13699261