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Asymmetric Ion-Pairing Photoredox Catalysis for Stereoselective Cationic Polymerization under Light Control.

Zan YangYun LiaoZhengyi ZhangJianxu ChenXun ZhangSaihu Liao
Published in: Journal of the American Chemical Society (2024)
By virtue of noninvasive regulations by light, photocontrolled polymerizations have attracted considerable attention for the precision synthesis of macromolecules. However, a cationic polymerization with simultaneous photocontrol and tacticity-regulation remains elusive so far. Herein, we introduce an asymmetric ion-pairing photoredox catalysis strategy that allows for the development of a stereoselective cationic polymerization with concurrent light regulation for the first time. By employing an ion pair catalyst (PC + /*A - ) consisting of a photoredox active cation (PC + ) and a sterically confined chiral anion (*A - ) to deliver the stereochemical control, the cationic polymerization of vinyl ethers can be achieved with photocontrol and high isotactic selectivity (up to 91% m ) at a remarkable low catalyst loading (50 ppm).
Keyphrases
  • visible light
  • ionic liquid
  • room temperature
  • working memory
  • reduced graphene oxide
  • carbon dioxide
  • mass spectrometry
  • capillary electrophoresis
  • gold nanoparticles
  • metal organic framework