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Selective sorting of polymers with different terminal groups using metal-organic frameworks

Author

Listed:
  • Benjamin Le Ouay

    (The University of Tokyo
    CREST, Japan Science and Technology Agency (JST))

  • Chikara Watanabe

    (Kyoto University)

  • Shuto Mochizuki

    (Kyoto University)

  • Masayoshi Takayanagi

    (CREST, Japan Science and Technology Agency (JST)
    Shiga University
    RIKEN Center for Advanced Intelligence Project)

  • Masataka Nagaoka

    (CREST, Japan Science and Technology Agency (JST)
    Nagoya University)

  • Takashi Kitao

    (The University of Tokyo
    CREST, Japan Science and Technology Agency (JST)
    The University of Tokyo)

  • Takashi Uemura

    (The University of Tokyo
    CREST, Japan Science and Technology Agency (JST)
    The University of Tokyo)

Abstract

Separation of high-molecular-weight polymers differing just by one monomeric unit remains a challenging task. Here, we describe a protocol using metal-organic frameworks (MOFs) for the efficient separation and purification of mixtures of polymers that differ only by their terminal groups. In this process, polymer chains are inserted by threading one of their extremities through a series of MOF nanowindows. Selected termini can be adjusted by tuning the MOF structure, and the insertion methodology. Accordingly, MOFs with permanently opened pores allow for the complete separation of poly(ethylene glycol) (PEG) based on steric hindrance of the terminal groups. Excellent separation is achieved, even for high molecular weights (20 kDa). Furthermore, the dynamic character of a flexible MOF is used to separate PEG mixtures with very similar terminal moieties, such as OH, OMe, and OEt, as the slight difference of polarity in these groups significantly changes the pore opening kinetics.

Suggested Citation

  • Benjamin Le Ouay & Chikara Watanabe & Shuto Mochizuki & Masayoshi Takayanagi & Masataka Nagaoka & Takashi Kitao & Takashi Uemura, 2018. "Selective sorting of polymers with different terminal groups using metal-organic frameworks," Nature Communications, Nature, vol. 9(1), pages 1-8, December.
    • Handle: RePEc:nat:natcom:v:9:y:2018:i:1:d:10.1038_s41467-018-06099-z
    DOI: 10.1038/s41467-018-06099-z
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    Cited by:

    1. Tomoya Iizuka & Hiroyuki Sano & Benjamin Ouay & Nobuhiko Hosono & Takashi Uemura, 2023. "An approach to MOFaxanes by threading ultralong polymers through metal–organic framework microcrystals," Nature Communications, Nature, vol. 14(1), pages 1-8, December.

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