Reversible Modulation of Circularly Polarized Luminescence in Chiral Molecular Cage-Based Supramolecular Assemblies

• • The chiral molecular cage (4R/S)Cy-NDIDA exhibits negligible fluorescence in both solution and solid states, with quantum yields below 1%, necessitating external activation for practical CPL applications. • • Host-guest complexation with tris(pentafluorophenyl)borane (TFPB) enhances photoluminescence and CPL signals, achieving a dissymmetry factor (glum) of up to 1.2 × 10^-3, which is competitive with existing supramolecular CPL systems. • • Integration of diarylethene (DAE) enables reversible switching of FRET-mediated fluorescence quenching and recovery, with fatigue resistance over at least 10 cycles and response times under 1 minute, critical for dynamic information encryption. • • The system demonstrates precise control over CPL switching via light irradiation, offering a modular platform for 3D display technologies that require high spatial and temporal resolution.