Circularly Polarized Luminescence from π‐Conjugated Chiral Perylene Diimide Luminophores: The Bay Position Effect

Three types of chiral perylene diimide luminophores bearing ethynyl, phenyl, and ethynylphenyl substituents (BPP-Ethy, BPP-Ph, BPP-EthyPh) at the bay positions were prepared. The chiroptical properties compounds in their solution (in CHCl3) polymethyl methacrylate (PMMA)-film solid states investigated. Similar to BPP molecules no position, BPP-Ethy, BPP-EthyPh emitted clear circularly polarized luminescence (CPL) CHCl3 solution. In contrast, exhibited intense aggregation-induced enhanced CPL (AIEnh-CPL) PMMA-film state; similar properties. Although four same absolute configurations, signs opposite those BPP, BPP-Ph. This could be attributed effects position.