BODIPY‐Anthracene‐Binaphthyl Compounds Display Aging‐Driven Narrow‐Band Circularly Polarized Luminescence Enhancement with Light‐Activated AIE‐to‐ACQ Transformation

The development of circularly polarized luminescence (CPL) materials has garnered considerable interest owing to their promising applications in areas such as 3D displays and information encryption, with most efforts devoted to generating CPL activity and improving the dissymmetry factor (g_lum). However, the essential requirement of narrow-band emission for high-resolution organic optoelectronic applications is often overlooked. Here we employed the anthracene group as strong assembly unit and BODIPY as narrow-band fluorophore to construct with chiral binaphthyl moiety. The resulting compounds R/S-An-BDP displayed light-triggered transformation from aggregation-induced emission (AIE) to aggregation-caused quenching (ACQ) with CPL signals regulation. Moreover, R/S-An-BDP showed aging-driven narrow-band fluorescence with the full width at half maximum (FWHM) of 14 nm and CPL activity with the |g_lum| value of 0.048 in the aggregate state, attributed to the combined effect of BODIPY and anthracene unit. These findings highlight a functional group fusion strategy for constructing CPL materials with large g_lum values and narrow emission, offering a promising approach towards high-performance CPL materials.