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Untwisted restacking of two-dimensional metal-organic framework nanosheets for highly selective isomer separations

Author

Listed:
  • Ze-Rong Tao

    (Nanjing Normal University)

  • Jian-Xiang Wu

    (Nanjing Normal University)

  • Ying-Jie Zhao

    (Beijing University of Chemical Technology)

  • Ming Xu

    (Nanjing Normal University)

  • Wen-Qi Tang

    (Nanjing Normal University)

  • Qing-Hua Zhang

    (Chinese Academy of Sciences)

  • Lin Gu

    (Chinese Academy of Sciences)

  • Da-Huan Liu

    (Beijing University of Chemical Technology)

  • Zhi-Yuan Gu

    (Nanjing Normal University)

Abstract

The stacking between nanosheets is an intriguing and inevitable phenomenon in the chemistry of nano-interfaces. Two-dimensional metal-organic framework nanosheets are an emerging type of nanosheets with ultrathin and porous features, which have high potential in separation applications. Here, the stacking between single-layer metal-organic framework nanosheets is revealed to show three representative conformations with tilted angles of 8°, 14°, and 30° for Zr-1, 3, 5-(4-carboxylphenyl)-benzene framework as an example. Efficient untwisted stacking strategy by simple heating is proposed. A detailed structural analysis of stacking modes reveals the creation of highly ordered sub-nanometer micropores in the interspacing of untwisted nano-layers, yielding a high-resolution separator for the pair of para-/meta-isomers over the twisted counterparts and commercial HP-5MS and VF-WAXMS columns. This general method is proven by additional nanosheet examples and supported by Grand Canonical Monte Carlo simulation. This finding will provide a synthetic route in the rational design of functionalities in two-dimensional metal-organic framework nanosheet.

Suggested Citation

  • Ze-Rong Tao & Jian-Xiang Wu & Ying-Jie Zhao & Ming Xu & Wen-Qi Tang & Qing-Hua Zhang & Lin Gu & Da-Huan Liu & Zhi-Yuan Gu, 2019. "Untwisted restacking of two-dimensional metal-organic framework nanosheets for highly selective isomer separations," Nature Communications, Nature, vol. 10(1), pages 1-8, December.
    • Handle: RePEc:nat:natcom:v:10:y:2019:i:1:d:10.1038_s41467-019-10971-x
    DOI: 10.1038/s41467-019-10971-x
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