Redox‐Responsive Hydrogel System Using the Molecular Recognition of β‐Cyclodextrin

Abstract Summary: We have successfully constructed a redox‐responsible hydrogel system by combination of β ‐cyclodextrin ( β ‐CD), dodecyl‐modified poly(acrylic acid) [p(AA/C 12 )], and a redox‐responsive guest, ferrocenecarboxylic acid (FCA). In the reduced state of FCA, the ternary mixture exhibited a gel‐like behavior, whereas, in its oxidized state, the mixture exhibited a sol behavior. Conceptual illustration for the redox‐responsive hydrogel system. magnified image Conceptual illustration for the redox‐responsive hydrogel system.