Benzotriazole derivatives as long wavelength photosensitizers for diaryliodonium salt initiators
2010; Wiley; Volume: 49; Issue: 3 Linguagem: Inglês
10.1002/pola.24485
ISSN1099-0518
AutoresUmut Bulut, Abidin Balan, Cagin Caliskan,
Tópico(s)Click Chemistry and Applications
ResumoAbstract Two benzotriazole derivative dyes 4,7‐bis(2,3‐dihydrothieno[3,4‐b][1,4]dioxin‐5‐yl)‐2‐dodecyl‐2 H ‐benzo[1,2,3]triazole, and 2‐dodecyl‐4,7‐bis(4‐hexylthiophen‐2‐yl)‐2 H ‐benzo[ d ][1,2,3]triazole are shown to work as efficient photosensitizers for a diphenyliodonium salt initiator in cationic photopolymerization of epoxide and vinyl monomers. Substituted thienyl groups are attached to benzotriazole backbone to extend conjugation and enhance electron density of the molecules. Thereby, it was possible to initiate polymerizations at room temperature using long wavelength UV and visible light. The progress of photopolymerizations was monitored using optical pyrometry. The photopolymerization of an epoxide monomer using solar irradiation was also demonstrated. © 2010 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem, 2011
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