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A metal–ion-responsive adhesive material via switching of molecular recognition properties

Author

Listed:
  • Takashi Nakamura

    (Graduate School of Science, Osaka University)

  • Yoshinori Takashima

    (Graduate School of Science, Osaka University)

  • Akihito Hashidzume

    (Graduate School of Science, Osaka University)

  • Hiroyasu Yamaguchi

    (Graduate School of Science, Osaka University)

  • Akira Harada

    (Graduate School of Science, Osaka University
    Japan Science and Technology Agency (JST), Core Research for Evolutional Science and Technology (CREST))

Abstract

Common adhesives stick to a wide range of materials immediately after they are applied to the surfaces. To prevent indiscriminate sticking, smart adhesive materials that adhere to a specific target surface only under particular conditions are desired. Here we report a polymer hydrogel modified with both β-cyclodextrin (βCD) and 2,2′-bipyridyl (bpy) moieties (βCD–bpy gel) as a functional adhesive material responding to metal ions as chemical stimuli. The adhesive property of βCD–bpy gel based on interfacial molecular recognition is expressed by complexation of metal ions to bpy that controlled dissociation of supramolecular cross-linking of βCD–bpy. Moreover, adhesion of βCD–bpy gel exhibits selectivity on the kinds of metal ions, depending on the efficiency of metal–bpy complexes in cross-linking. Transduction of two independent chemical signals (metal ions and host–guest interactions) is achieved in this adhesion system, which leads to the development of highly orthogonal macroscopic joining of multiple objects.

Suggested Citation

  • Takashi Nakamura & Yoshinori Takashima & Akihito Hashidzume & Hiroyasu Yamaguchi & Akira Harada, 2014. "A metal–ion-responsive adhesive material via switching of molecular recognition properties," Nature Communications, Nature, vol. 5(1), pages 1-9, December.
    • Handle: RePEc:nat:natcom:v:5:y:2014:i:1:d:10.1038_ncomms5622
    DOI: 10.1038/ncomms5622
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