Controlled Synthesis of Cyclic‐Helical Polymers with Circularly Polarized Luminescence

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  • Lei Xu
    State Key Laboratory of Supramolecular Structure and Materials College of Chemistry Jilin University Changchun 130012 China
  • Bao‐Rui Gao
    Department of Polymer Science and Engineering School of Chemistry and Chemical Engineering Anhui Key Laboratory of Advanced Catalytic Materials and Reaction Engineering. Hefei University of Technology Hefei 230009, Anhui Province China
  • Xun‐Hui Xu
    Department of Polymer Science and Engineering School of Chemistry and Chemical Engineering Anhui Key Laboratory of Advanced Catalytic Materials and Reaction Engineering. Hefei University of Technology Hefei 230009, Anhui Province China
  • Li Zhou
    Department of Polymer Science and Engineering School of Chemistry and Chemical Engineering Anhui Key Laboratory of Advanced Catalytic Materials and Reaction Engineering. Hefei University of Technology Hefei 230009, Anhui Province China
  • Na Liu
    Department of Polymer Science and Engineering School of Chemistry and Chemical Engineering Anhui Key Laboratory of Advanced Catalytic Materials and Reaction Engineering. Hefei University of Technology Hefei 230009, Anhui Province China
  • Zong‐Quan Wu
    State Key Laboratory of Supramolecular Structure and Materials College of Chemistry Jilin University Changchun 130012 China

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<jats:title>Abstract</jats:title><jats:p>Cyclic polymers attract attention because of their endless structure and unique properties, which differ from the linear analogs. However, the synthesis of cyclic polymers is difficult and prohibits their functions and applications. In this study, we reported chiral cyclic Pd<jats:sup>II</jats:sup>‐catalysts that initiate a living ring‐expansion polymerization of isocyanides, yielding a single‐handed cyclic‐helical poly(phenyl isocyanide), with predictable molecular weight (<jats:italic>M</jats:italic><jats:sub>n</jats:sub>) and low dispersity (<jats:italic>M</jats:italic><jats:sub>w</jats:sub>/<jats:italic>M</jats:italic><jats:sub>n</jats:sub>), in good yield. Using this method, cyclic bottlebrush polymers were prepared via the grafting‐onto strategy. The cyclic topology was confirmed using various spectroscopic data and atomic force microscope observation. Moreover, the cyclic polymer brushes, comprising of a one‐handed helical backbone, showed interesting photoluminescence and circularly‐polarized luminescence.</jats:p>

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