Effect of oligomerization on the photochemical properties of silicon octaphenoxyphthalocyanine

The photochemical properties of silicon octaphenoxyphthalocyanines (SiOPPc) oligomerized were studied in dimethylsulfoxide (DMSO) solutions. Oligomers containing 2–5 and 9 SiOPPc rings linked with terephthalate linkages were synthesized. Singlet oxygen quantum yields were found to be in the range 0....

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Bibliographic Details
Published in:Journal of photochemistry and photobiology. A, Chemistry. Chemistry., 2001-08, Vol.142 (1), p.39-46
Main Authors: Maree, M.David, Nyokong, Tebello
Format: Article
Language:English
Subjects:
Chemistry
Exact sciences and technology
General and physical chemistry
Photochemistry
Phototransformation
Physical chemistry of induced reactions (with radiations, particles and ultrasonics)
Quantum yields
Silicon phthalocyanine
Singlet oxygen
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Summary:The photochemical properties of silicon octaphenoxyphthalocyanines (SiOPPc) oligomerized were studied in dimethylsulfoxide (DMSO) solutions. Oligomers containing 2–5 and 9 SiOPPc rings linked with terephthalate linkages were synthesized. Singlet oxygen quantum yields were found to be in the range 0.11–0.34, and increased with the number of rings up to five rings, a decrease in the quantum yield was observed for nine rings. This is explained in terms of the high aggregation of the oligomer containing nine rings.
ISSN:1010-6030
1873-2666
DOI:10.1016/S1010-6030(01)00485-3