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Anion-adaptive crystalline cationic material for 99TcO4− trapping

Author

Listed:
  • Lei Mei

    (Chinese Academy of Sciences)

  • Fei-ze Li

    (Chinese Academy of Sciences)

  • Jian-hui Lan

    (Chinese Academy of Sciences)

  • Cong-zhi Wang

    (Chinese Academy of Sciences)

  • Chao Xu

    (Tsinghua University)

  • Hao Deng

    (Chinese Academy of Sciences)

  • Qun-yan Wu

    (Chinese Academy of Sciences)

  • Kong-qiu Hu

    (Chinese Academy of Sciences)

  • Lin Wang

    (Chinese Academy of Sciences)

  • Zhi-fang Chai

    (Chinese Academy of Sciences
    Chinese Academy of Sciences)

  • Jing Chen

    (Tsinghua University)

  • John K. Gibson

    (Lawrence Berkeley National Laboratory)

  • Wei-qun Shi

    (Chinese Academy of Sciences)

Abstract

Efficient anion recognition is of great significance for radioactive 99TcO4− decontamination, but it remains a challenge for traditional sorbents. Herein, we put forward a tactic using soft crystalline cationic material with anion-adaptive dynamics for 99TcO4− sequestration. A cucurbit[8]uril-based supramolecular metal-organic material is produced through a multi-component assembly strategy and used as a sorbent for effective trapping of TcO4−. Excellent separation of TcO4−/ReO4− is demonstrated by fast removal kinetics, good sorption capacity and high distribution coefficient. Remarkably, the most superior selectivity among metal-organic materials reported so far, together with good hydrolytic stability, indicates potential for efficient TcO4− removal. The structure incorporating ReO4− reveals that the supramolecular framework undergoes adaptive reconstruction facilitating the effective accommodation of TcO4−/ReO4−. The results highlight opportunities for development of soft anion-adaptive sorbents for highly selective anion decontamination.

Suggested Citation

  • Lei Mei & Fei-ze Li & Jian-hui Lan & Cong-zhi Wang & Chao Xu & Hao Deng & Qun-yan Wu & Kong-qiu Hu & Lin Wang & Zhi-fang Chai & Jing Chen & John K. Gibson & Wei-qun Shi, 2019. "Anion-adaptive crystalline cationic material for 99TcO4− trapping," Nature Communications, Nature, vol. 10(1), pages 1-12, December.
    • Handle: RePEc:nat:natcom:v:10:y:2019:i:1:d:10.1038_s41467-019-09504-3
    DOI: 10.1038/s41467-019-09504-3
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