Inverted Circularly Polarized Luminescence Behavior Induced by Helical Nanofibers through Chiral Co-Assembly from Achiral Liquid Crystal Polymers and Chiral Inducers.

Chiral supramolecular assembly can provide a powerful strategy for developing circularly polarized luminescence (CPL)-active materials by forming helices or superhelices into single or multiple components. Herein, we chose three achiral liquid crystal polymers ( LC-P1/P2 / P3 ) and chiral binaphthyl-based inducers ( R/S -M ) with anchored dihedral angles to construct chiral co-assemblies and explore the induced CPL behavior from pyrenyl (Py) emitters in achiral LC polymers through the regulation of helical nanofibers during the supramolecular co-assembly process. Most interestingly, chiral co-assembly ( R/S- M) 0.1 -(P3) 0.9 emitted an inverted blue-colored CPL signal during thermal annealing treatment at the glass transition temperature due to the flexible main chain of the LC polymer ( LC-P3 ). The strongest blue-colored CPL emission for the ( R/S- M) 0.1 -(P3) 0.9 spin-coated film (λ em = 455 nm, | g em | = 6.47 × 10 -2 , Φ F = 48.5%) could be detected by using thermal annealing treatment at 105 °C.