Anion-adaptive crystalline cationic material for 99TcO4− trapping

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 and Wei-qun Shi ()
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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
Jing Chen: Tsinghua University
John K. Gibson: Lawrence Berkeley National Laboratory
Wei-qun Shi: Chinese Academy of Sciences

Nature Communications, 2019, vol. 10, issue 1, 1-12

Abstract: 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.

Date: 2019
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DOI: 10.1038/s41467-019-09504-3

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