Vinylene-Linked Helical Covalent Organic Frameworks

alongside a solid-state photoluminescence quantum yield (PLQY) of up to 45.7%, the highest reported among chiral COF-based materials. Systematic comparisons across molecular, framework, and macroscopic levels reveal that this exceptional chiroptical activity arises from the synergistic coupling of the emissive vinylene-linked conjugated framework with the well-defined macroscopic helical architecture, collectively enabling efficient chirality transfer and amplification. This work establishes a new synthetic pathway for crystalline COF helices and highlights hierarchical covalent assembly as a powerful strategy for designing high-performance chiroptical materials.