Facile modification of phosphole-based aggregation-induced emission luminogens with sulfonyl isocyanates

König, N.; Godínez-Loyola, Y.; Yang, F.; Laube, C.; Laue, M.; Lönnecke, P.; Strassert, C. A.; Hey-Hawkins, E.

Abstract

Phosphole oxides undergo a highly chemoselective reaction with sulfonyl isocyanates forming sulfonylimino phospholes in high yields. This facile modification proved to be a powerful tool for obtaining new phosphole-based aggregation-induced emission (AIE) luminogens with high fluorescence quantum yields in the solid state. Changing the chemical environment of the phosphorus atom of the phosphole framework results in a significant shift of the fluorescence maximum to longer wavelengths.