Pyrrolines, also called dihydropyrroles, are obtained from aromatic pyrroles by hydrogenation. 1-pyrroline is a cyclic imine, while 2-pyrroline and 3-pyrroline are cyclic amines.
Aggregation-induced Emission (AIE) is a phenomenon in which some molecules do not emit light in the state of individual molecules, but can emit light in the state of aggregation. The structure of this phenomenon usually includes a rigid aromatic ring and flexible side chains. AIE technology has a wide range of applications in biological probes, optoelectronic devices, sensors and other fields, and it is a highly concerned research field.