• • Azobenzene-based chiral supramolecular systems enable reversible chirality inversion under light irradiation, with response times as low as milliseconds, enabling dynamic photonic applications.
• • Cholesteric liquid crystals doped with azobenzene derivatives exhibit tunable reflection wavelengths across the visible spectrum (e.g., 450–650 nm) upon UV/vis irradiation, with thermal relaxation half-lives exceeding 10 minutes for bistable switching.
• • Photoinduced helical twisting power (HTP) changes of up to 20 μm⁻¹ have been achieved in azobenzene-doped cholesteric liquid crystals, allowing precise control of helical pitch and handedness.
• • Multi-stimuli responsiveness (light, heat, pH, CO₂) in Azo-containing block copolymer assemblies enables orthogonal control of supramolecular chirality, with circular dichroism (CD) signal changes exceeding 50 mdeg, suitable for multi-responsive chiral sensors.