title: pH-responsive self-assembly by molecular recognition on a macroscopic scale.
abstract: Macroscopic pH-responsive self-assembly is successfully constructed by polyacrylamide(pAAm)-based gels carrying dansyl (Dns) and β-cyclodextrin (βCD) residues, which are represented as Dns-gel and βCD-gel, respectively. Dns-gel and βCD-gel assemble together at pH ≥ 4.0, but disassemble at pH ≤ 3.0. The adhesion strengths for pairs of Dns-gel/βCD-gel increase with increasing pH. The fluorescence study on the model system of pAAm modified with 1 mol% Dns moieties (pAAm/Dns) reveals that Dns residues are protonated at a lower pH, which results in the reduction in binding constant (K) for Dns residues and βCD.
authors.affiliation: Department of Macromolecular Science, Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan.
authors.forename: Yongtai
authors.initials: Y
authors.lastname: Zheng
authors.forename: Akihito
authors.initials: A
authors.lastname: Hashidzume
authors.forename: Akira
authors.initials: A
authors.lastname: Harada
mesh_terms: D000180:Acrylic Resins / Q000737:chemistry*; D005782:Gels; D006863:Hydrogen-Ion Concentration; D007700:Kinetics; D044367:Phase Transition; D010713:Phosphatidylcholines / Q000737:chemistry*; D011522:Protons; D012996:Solutions; D014867:Water / Q000737:chemistry*; D047392:beta-Cyclodextrins / Q000737:chemistry*; D000099166:Polyacrylamides
chemical_list: D000180:Acrylic Resins; D005782:Gels; D010713:Phosphatidylcholines; D011522:Protons; D012996:Solutions; D014867:Water; D047392:beta-Cyclodextrins; D000099166:Polyacrylamides; C496906:1-myristoyl-2-(12-((5-dimethylamino-1-naphthalenesulfonyl)amino)dodecanoyl)-sn-glycero-3-phosphocholine
keywords: cyclodextrin; dansyl; molecular recognition; pH-responsive; self-assembly