Excited state intramolecular proton transfer fluorescence emission of o-hydroxyphenyl-triazine derivatives

Abstract

o-hydroxyphenyl-triazine derivatives with formyl substituents were surveyed for the excited state intramolecular proton transfer (ESIPT). The occurrence of ESIPT was confirmed by well-separated emission bands for the derivatives. A low energy change from enol to keto in the excited state explains ESIPT for the derivatives. © 2011 The Author(s).