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Redox-Generated Mechanical Motion of a Supramolecular Polymeric Actuator Based on Host–Guest Interactions

Authors

  • Masaki Nakahata,

    1. Department of Macromolecular Science, Graduate School of Science, Osaka University, Toyonaka, Osaka, 560-0043 (Japan)
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  • Dr. Yoshinori Takashima,

    1. Department of Macromolecular Science, Graduate School of Science, Osaka University, Toyonaka, Osaka, 560-0043 (Japan)
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  • Dr. Akihito Hashidzume,

    1. Department of Macromolecular Science, Graduate School of Science, Osaka University, Toyonaka, Osaka, 560-0043 (Japan)
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  • Prof. Dr. Akira Harada

    Corresponding author
    1. Department of Macromolecular Science, Graduate School of Science, Osaka University, Toyonaka, Osaka, 560-0043 (Japan)
    2. Core Research for Evolutional Science and Technology (CREST), Japan Science and Technology Agency (JST)
    • Department of Macromolecular Science, Graduate School of Science, Osaka University, Toyonaka, Osaka, 560-0043 (Japan)

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  • This research was supported by the CREST project (Japan) Science and Technology Agency. M.N. appreciates a JSPS fellowship from MEXT of Japan. The authors thank Seiji Adachi and Naoya Inazumi (Osaka University) for their helpful advice for the measurement of FGMAS and 2D ROESY NMR spectra.

Abstract

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A supramolecular hydrogel is formed by a water-soluble polymer cross-linked with host–guest inclusion complexes between cyclodextrin and ferrocene. Dissociation and re-formation of inclusion complexes by redox stimuli lead to macroscale expansion and contraction of the hydrogel. The gel is utilized as a redox-responsive actuator and the mechanical work done is evaluated.

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