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Ultrathin two-dimensional porous organic nanosheets with molecular rotors for chemical sensing

Author

Listed:
  • Jinqiao Dong

    (National University of Singapore)

  • Kang Zhang

    (National University of Singapore)

  • Xu Li

    (National University of Singapore)

  • Yuhong Qian

    (National University of Singapore)

  • Hai Zhu

    (National University of Singapore)

  • Daqiang Yuan

    (Chinese Academy of Sciences)

  • Qing-Hua Xu

    (National University of Singapore)

  • Jianwen Jiang

    (National University of Singapore)

  • Dan Zhao

    (National University of Singapore)

Abstract

Molecular rotors have played an important role in recent materials chemistry. Although several studies on functional materials containing molecular rotors have been reported for fluorescence sensing, this concept has yet to be realized in two-dimensional (2D) materials. Here we report the preparation of all-carbon, π-conjugated 2D porous organic nanosheets, named NUS-24, which contain flexible tetraphenylethylene (TPE) units as the molecular rotors. NUS-24 nanosheets exhibit high stability, large lateral size, and ultrathin thickness (2–5 nm). The dynamic TPE rotors exposed on the surface of NUS-24 nanosheets can be restricted in the aggregated state with different water fractions, which is reminiscent of the aggregation-induced emission mechanism, thereby leading to the size-selective turn-on fluorescence by volatile organic compounds. Significantly, the ultrathin 2D nanosheets and its composite membranes show much higher sensitivity and selectivity toward Fe3+ ions and nitro-containing compounds sensing, suggesting their potential applications in explosive detection and environmental monitoring.

Suggested Citation

  • Jinqiao Dong & Kang Zhang & Xu Li & Yuhong Qian & Hai Zhu & Daqiang Yuan & Qing-Hua Xu & Jianwen Jiang & Dan Zhao, 2017. "Ultrathin two-dimensional porous organic nanosheets with molecular rotors for chemical sensing," Nature Communications, Nature, vol. 8(1), pages 1-14, December.
    • Handle: RePEc:nat:natcom:v:8:y:2017:i:1:d:10.1038_s41467-017-01293-x
    DOI: 10.1038/s41467-017-01293-x
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    Cited by:

    1. Gobinda Das & Bikash Garai & Thirumurugan Prakasam & Farah Benyettou & Sabu Varghese & Sudhir Kumar Sharma & Felipe Gándara & Renu Pasricha & Maria Baias & Ramesh Jagannathan & Na’il Saleh & Mourad El, 2022. "Fluorescence turn on amine detection in a cationic covalent organic framework," Nature Communications, Nature, vol. 13(1), pages 1-12, December.

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