Excited state proton transfer (ESPT) from phenol to nitrogen and carbon in (2-hydroxyphenyl)pyridines†
Abstract
ESIPT and ESPT are the only photochemical deactivation pathways of the singlet excited states of 2-, 3- and 4-(2′-hydroxyphenyl)pyridines (1a–c). Due to the existence of an intramolecular hydrogen bond in