3c16 Lyotropic Chiral Nematic Liquid Crystalline Di-substituted Polyacetylene Derivatives that exhibit Circularly Polarized Luminescence

Abstract

We synthesized di-substituted liquid crystalline polyacetylene derivatives with lyotropic LC behavior. The poly(diphenylacetylene) main chain structure of the di-LCPAs and the chirality induced with either chiral moieties or chiral dopants form a highly ordered lyotropic N*-LC phase. CD spectra of the di-LCPAs imply interchain helical π-stacking between the polymer main chains in the N*-LC state. Absorption dissymmetry factors in the N*-LC state show values on the order of 10^-1. The N*-LC state facilitates helically π-stacked structures with high degrees of helical ordering and is indispensable for the generation of CPL with high emission dissymmetry factors on the order of 10^-1.