Recent progress in research on stimuli-responsive circularly polarized luminescence based on pi-conjugated molecules

This short review article summarizes recent progress in research on various stimuli-responsive circularly polarized luminescence (CPL) properties derived from pi-conjugated molecules and related materials. As representative examples, assembled structures of chiral pi-conjugated polymers and molecules showed tunable CPL resulting from the enhancement of chirality induction by aggregation. Fascinating CPL-active species, pyrrole-based anion-responsive pi-conjugated molecules exhibiting CPL induced by anion binding and ion pairing, are also discussed.