title: Redox-responsive macroscopic gel assembly based on discrete dual interactions.
abstract: The macroscopic self-assembly of polymeric hydrogels modified with β-cyclodextrin (βCD gel), ferrocene (Fc gel), and styrenesulfonic acid sodium salt (SSNa gel) was investigated. Under reductive conditions, the Fc gel selectively adhered to the βCD gel through a host-guest interaction. On the other hand, the oxidized ferrocenium (Fc(+)) gel selectively adhered to the SSNa gel through an ionic interaction under oxidative conditions. The adhesion strength was estimated by a tensile test. We finally succeeded in forming an ABC-type macroscopic assembly of all three gels through two discrete noncovalent interactions.
authors.affiliation: Department of Macromolecular Science, Graduate School of Science, Osaka University, Toyonaka, Osaka, 560-0043 (Japan).
authors.forename: Masaki
authors.initials: M
authors.lastname: Nakahata
authors.forename: Yoshinori
authors.initials: Y
authors.lastname: Takashima
authors.forename: Akira
authors.initials: A
authors.lastname: Harada
mesh_terms: D003505:Cyclodextrins / Q000737:chemistry*; D020100:Hydrogels / Q000737:chemistry*; D010084:Oxidation-Reduction; D011108:Polymers
chemical_list: D003505:Cyclodextrins; D020100:Hydrogels; D011108:Polymers
keywords: cyclodextrins; ferrocene; host-guest systems; ionic interactions; macroscopic assemblies