Journal
MACROMOLECULAR RAPID COMMUNICATIONS
Volume 29, Issue 22, Pages 1823-1827Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/marc.200800421
Keywords
ageing; conjugated polymer; photochemistry; poly(3-hexylthiophene); singlet oxygen
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We studied the role that singlet oxygen plays in the solid-state photochemistry of poly(3-hexylthiophene) (P3HT). The photosensitized formation of singlet oxygen by solid-state P3HT and its subsequent reactivity on the polymer were investigated. Using a fluorescent probe, it was found that singlet oxygen(O-1(2))could be produced by irradiation of P3HT by photosensitization, with no oxidation of the polymer. In addition, O-1(2) was directly formed on P3HT via a chemical reaction, again with no oxidation of the polymer. These results give strong evidence that O-1(2) is not the principal photo-oxidative degradation intermediate of P3HT, which conflicts with previous reports.
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