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      pH-responsive self-assembly by molecular recognition on a macroscopic scale.

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          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.

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          Author and article information

          Journal
          Macromol Rapid Commun
          Macromolecular rapid communications
          1521-3927
          1022-1336
          Jul 12 2013
          : 34
          : 13
          Affiliations
          [1 ] Department of Macromolecular Science, Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan.
          Article
          10.1002/marc.201300324
          23723096
          7791b59c-00aa-4298-b6a7-1d8b4348af5e
          Copyright © 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

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