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A Universal Chiral Poly(Phenyl Isocyanate) Host for Inducing Full-Color Circularly Polarized Luminescence of Achiral
Liang Chen1, Zhimin Hu1, Shuo Li1
1State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing, China.
Abstract:
A design strategy for preparing circularly polarized thermally activated delayed fluorescence (TADF) materials is proposed by utilizing the intermolecular interactions between chiral polymeric hosts and non-chiral TADF emitters to achieve chirality transfer. A single-handed helical polymer, poly-DMAC, is successfully designed and synthesized, which serves as a universal chiral host to induce circularly polarized luminescence (CPL). By blending poly-DMAC with four TADF emitters, full-color stable CPL emission ranging from blue-green to orange-red is achieved, with a maximum asymmetric factor reaching the order of 10-3. This research demonstrates that through a simple blending method, chiral polymer hosts enable non-chiral TADF emitters to achieve full-color and unidirectional CPL emission, highlighting the promising prospects of helical polymers for CPL applications.
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