Color‐Tunable Circularly Polarized Luminescence with Helical Polyacetylenes as Fluorescence Converters

Abstract Circularly polarized luminescence (CPL) materials are currently drawing rapidly increasing interest. However, constructing color‐tunable CPL materials is still a big challenge, primarily due to the lack of simple, powerful, and universal preparation strategies. In this contribution, color‐tunable CPL emissions are easily realized by taking helical polyacetylenes as fluorescence converters. The investigated helical polyacetylenes are prepared by solution polymerization of a substituted acetylenic monomer with cholesteryl pendant. The prepared polymer exhibits dynamically reversible solvatochromism performance in different solvents, owing to the change of conjugated length of polymer main‐chains. More excitingly, when circularly polarized light with blue emission passes through the as‐prepared helical polyacetylene with different conjugated lengths, multicolor CPL emissions of cyan, green, and orange are obtained, with high dissymmetry factors ( g lum ) in the range of 10 −2 –10 −1 . Also notably, neither any covalent nor noncovalent interaction is required during this CPL color‐tuning process. The present study provides a new insight for developing multicolor CPL materials.