Multistate Circularly Polarized Luminescence Switching through Stimuli‐Induced Co‐Conformation Regulations of Pyrene‐Functionalized Topologically Chiral [2]Catenane

Abstract

Abstract Aiming at the construction of novel circularly polarized luminescence (CPL) switches with multiple switchable emission states and high dissymmetry factors ( g lum ), topologically chiral [2]catenanes were employed as the key platform to construct a novel multistate CPL switching system. Taking advantage of the precise co‐conformation regulations of the resultant pyrene‐functionalized [2]catenanes under different external stimuli, reversible transformations between three emission states with different CPL performances, i.e. the initial “ closed ” form with a | g lum | value of 0.012, the “ open ” form with an almost complete turn‐off of CPL emission, and the “ protonated ” form with a boosted | g lum | value of 0.022, were successfully realized. This study demonstrates the successful construction of not only the first topological chirality‐based CPL switch, but also a novel bidirectional CPL switch, thus providing a promising platform for the construction of novel chiral materials.