Harnessing Supramolecular Circularly Polarized Scattering for Enhanced Chiroptical Performance

Recent advancements in circularly polarized luminescence (CPL) materials have shifted the emphasis from optimizing intrinsic CPL properties to leveraging synergistic photophysical processes for enhanced system-level performance. In this study, we designed and synthesized a class of chiral small organic molecules, termed (R/S)-4LC, whose supramolecular assemblies exhibit Rayleigh-like scattering behavior. More importantly, these nanostructures exhibit circularly polarized scattering (CPS) behavior, selectively amplifying left- or right-handed CPL signals and achieving an unprecedented 200-fold increase in the luminescence dissymmetry factor (g_lum = 0.73), compared with the g_lum value obtained in the absence of scattering contributions. Furthermore, these architectures serve as efficient chiral energy donors, transferring polarized energy to achiral quantum dots (QDs) through radiative energy transfer, thereby inducing CPL activity in otherwise nonchiral emitters. Leveraging this platform, we developed two types of CPS-enhanced QD light-emitting diodes (CPS-QLEDs), demonstrating amplified chiroptical signals in both photoluminescence and electroluminescence systems. This work marks the first demonstration of utilizing supramolecular CPS effects to enhance chiroptical performance, offering a robust framework for the design of next-generation polarized optoelectronic devices.