Figure 3: Reaction of metal ions with βCD–bpy gel and its property change.
From: A metal–ion-responsive adhesive material via switching of molecular recognition properties
(a) Photographs of pieces of βCD–bpy gel before and after immersion in an aqueous solution of CuCl2 or FeCl2. Scale bar, 1 mm. (b) Length change of βCD–bpy gel on reaction with various metal salt aqueous solution ([MCl2]=2 mM (M2+=metal ion, 3 eq [/bpy]). Error bars, s.e.m. (n=4)). (c) Tensile modulus of βCD–bpy gels before and after immersed in an aqueous solution of CuCl2 or FeCl2 ([MCl2]=10 mM (M2+=metal ion, 3 eq [/bpy]). Error bars, s.e.m. (n=4)). (d) Schematic representation of decross-linking or cross-linking of βCD–bpy gels by metal–bpy complex formation.
