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

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 (similar to 10(-4)) in monomeric form, while demonstrating a prominent CPL signal with a higher dissymmetry factor (similar to 10(-3)) in thin solid films even without annealing processes. (C) 2016 Elsevier Ltd. All rights reserved.