Ricardo F. Affeldt, F. S. Santos, Natália G. Medeiros
Dec 1, 2013
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Abstract
2-(2’-Hydroxyphenyl)benzazoles are highly fluorescent compounds whose applications are widely applied in the field of the material chemistry. The well-known large Stokes’ shift in these dyes can be attributed to an excited state intramolecular proton transfer (ESIPT), a phenomena that occurs between an acidic phenol and basic azolic sites. This particular behavior makes this kind of compound suitable as building blocks for new fluorescent molecules. In this work we have developed a method for selective formylation of a 2(2’-hydroxyphenyl)benzoxazole (HBO) derivative and its photophysical profile were investigated by UV-Vis absorption and fluorescence emission.