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Fast and selective fluoride ion conduction in sub-1-nanometer metal-organic framework channels

Author

Listed:
  • Xingya Li

    (Monash University)

  • Huacheng Zhang

    (Monash University)

  • Peiyao Wang

    (The University of Melbourne)

  • Jue Hou

    (Monash University)

  • Jun Lu

    (Monash University)

  • Christopher D. Easton

    (Manufacturing, CSIRO)

  • Xiwang Zhang

    (Monash University)

  • Matthew R. Hill

    (Monash University
    Manufacturing, CSIRO)

  • Aaron W. Thornton

    (Manufacturing, CSIRO)

  • Jefferson Zhe Liu

    (The University of Melbourne)

  • Benny D. Freeman

    (The University of Texas at Austin)

  • Anita J. Hill

    (Manufacturing, CSIRO)

  • Lei Jiang

    (Monash University
    Chinese Academy of Sciences)

  • Huanting Wang

    (Monash University)

Abstract

Biological fluoride ion channels are sub-1-nanometer protein pores with ultrahigh F− conductivity and selectivity over other halogen ions. Developing synthetic F− channels with biological-level selectivity is highly desirable for ion separations such as water defluoridation, but it remains a great challenge. Here we report synthetic F− channels fabricated from zirconium-based metal-organic frameworks (MOFs), UiO-66-X (X = H, NH2, and N+(CH3)3). These MOFs are comprised of nanometer-sized cavities connected by sub-1-nanometer-sized windows and have specific F− binding sites along the channels, sharing some features of biological F− channels. UiO-66-X channels consistently show ultrahigh F− conductivity up to ~10 S m−1, and ultrahigh F−/Cl− selectivity, from ~13 to ~240. Molecular dynamics simulations reveal that the ultrahigh F− conductivity and selectivity can be ascribed mainly to the high F− concentration in the UiO-66 channels, arising from specific interactions between F− ions and F− binding sites in the MOF channels.

Suggested Citation

  • Xingya Li & Huacheng Zhang & Peiyao Wang & Jue Hou & Jun Lu & Christopher D. Easton & Xiwang Zhang & Matthew R. Hill & Aaron W. Thornton & Jefferson Zhe Liu & Benny D. Freeman & Anita J. Hill & Lei Ji, 2019. "Fast and selective fluoride ion conduction in sub-1-nanometer metal-organic framework channels," Nature Communications, Nature, vol. 10(1), pages 1-12, December.
  • Handle: RePEc:nat:natcom:v:10:y:2019:i:1:d:10.1038_s41467-019-10420-9
    DOI: 10.1038/s41467-019-10420-9
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    Cited by:

    1. Xingya Li & Gengping Jiang & Meipeng Jian & Chen Zhao & Jue Hou & Aaron W. Thornton & Xinyi Zhang & Jefferson Zhe Liu & Benny D. Freeman & Huanting Wang & Lei Jiang & Huacheng Zhang, 2023. "Construction of angstrom-scale ion channels with versatile pore configurations and sizes by metal-organic frameworks," Nature Communications, Nature, vol. 14(1), pages 1-12, December.

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