Hydrogen-Bond-Directed Chirality Transfer in Helical Polyacetylene–Perovskite–PDMS Elastomeric Films for Stretching-Tunable Multicolor Circularly Polarized Luminescence

Circularly polarized luminescence (CPL) has emerged as a critical technology for anticounterfeiting and optical display applications due to its unique chiroptical properties. We report a multicolor CPL-emitting elastomeric film (P37/PSK@SiO₂-PDMS) that synergistically combines chiral helical polyacetylene (P37) and a surface-engineered perovskite (PSK@SiO₂) through hydrogen-bond-directed assembly. Confinement within the PDMS matrix drives P37 to self-assemble into a chiral supramolecular structure through hydrogen bonding, inducing a chiroptical inversion. Simultaneously, surface modification of PSK@SiO₂ enhances its compatibility with PDMS while enabling efficient chirality and energy transfer from P37 via interfacial hydrogen bonds. The resulting material exhibits exceptional CPL performance, achieving a maximum dissymmetry factor of 4.3 × 10^-2 and a high photoluminescence quantum yield up to 67%. The PDMS matrix not only stabilizes the PSK components but also enables reversible, strain-tunable CPL modulation through its elastomeric properties. This work establishes a hydrogen-bonding paradigm for designing high-performance chiral PSK materials, while demonstrating their potential for dynamic photonic applications.