Construction of a Novel Photoresponsive Supramolecular Fluorescent Hydrogel through Host‐Guest Interaction between β‐Cyclodextrin and Azobenzene

In the present work, we constructed a novel photoresponsive supramolecular fluorescent hydrogel through host–guest interaction between β‐cyclodextrin group in polymer 1 and azobenzene group in polymer 2. Under different external irradiations, the fluorescent hydrogel exhibited different intensities to the photo‐isomerisation of azobenzene. Light is an ideal stimulus because of its simple operation and non‐introduction of additional impurities. Therefore, this photoresponsive supramolecular hydrogel can serve as an excellent strategy for designing more practical materials. We report a novel photoresponsive supramolecular fluorescent hydrogel constructed via host‐guest interaction between polymer 1 with pendant β‐CD and tetraphenylethylene (TPE) in side chain and polymer 2 with pendant β‐CD and TPE in side chain. The fluorescence intensity of hydrogel could be controlled by UV and visible light.