From Rehm–Weller to exciplex mechanisms by a structural effect: fluorescence quenching of a thioxanthone derivative by methoxy- and methyl-substituted benzenes in acetonitrile

Abstract

The fluorescence quenching of a thioxanthone derivative was found to follow either a Rehm–Weller behavior with methoxy-substituted benzenes or a sigmoidal curve due to an exciplex quenching mechanism with analogous methyl-substituted compounds.