Design, synthesis, and photophysical characterization of monoaryl-pyridine-2-ones derivatives: Exploring aggregation-caused quenching vs aggregation-induced emission

Abstract

The dihydropyridine core derivatives have been synthesized from the reaction of 2H-pyrone with hydrazine hydrate, in methanol ethanol solvent, obtained 70–90 %. Under the reflux condition occurred withopening of the lactone ring to yield monoaryl-pyridine-2-ones derivatives 3a-d in excellent yields. This method's main advantages are short reaction time, high amine utilization, and considerably improved yield. The emission of the molecules 3d can be significantly quenched by picric acid through electron transfer or energy transfer mechanisms, enabling them to function as chemosensors for explosive nitroaryl compound detection.