Tuning circularly polarized luminescence of an AIE-active pyrene luminogen from fluidic solution to solid thin film

Abstract The photoluminescence (PL) and circularly polarized luminescence (CPL) of (( R )-1-phenyl- N -(pyren-1-ylmethyl)ethanamine) P - R were successfully modulated via fine-tuning and precise control of excited conformation of dimer/excimer by external stimuli. The resulting aggregation-induced emission (AIE)-active material ( P - R ) exhibited CPL with a low dissymmetry factor (∼10 −4 ) in monomeric form, while demonstrating a prominent CPL signal with a higher dissymmetry factor (∼10 −3 ) in thin solid films even without annealing processes.