Photoinvertible Full‐Color Circularly Polarized Luminescence in Cyanostilbene Assemblies

Herein, we report the design and photo‐modulation of full‐color circularly polarized luminescence (CPL) of a V ‐shaped, cyclohexanediamine‐derived chiral trans ‐CCP functionalized with cyanostilbene moieties. With pronounced aggregation‐induced emission features and photo‐responsiveness, trans ‐CCP self‐assembles in DMSO‐H 2 O into a blue fluorescent gel constituted by nanospheres. Upon photoirradiation with 365 nm light, the gel undergoes a morphological transition into one‐dimensional nanofiber. It is interesting to find that photoinduced transformation is accompanied by an inversion of CD and CPL signals. Furthermore, through coassembly with achiral dye molecules that exhibit emissions ranging from green to red, trans ‐CCP readily serves as both an efficient chirality and energy transfer donor, rendering the originally achiral dye molecules a series of CPL emitters. Critically, the CPL signals of the doped emitters invert in response to UV irradiation while maintaining excellent color fidelity, following the supramolecular chirality switching of the CCP host. Therefore, a robust, photo‐regulated platform for full‐color CPL inversion within a coassembled system is established. By harnessing chirality transfer energy migration and photo‐switching, this work opens new avenues for the remote control of full‐color CPL materials.