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Title: Anion-adaptive crystalline cationic material for 99TcO4- trapping

Journal Article · · Nature Communications
ORCiD logo [1];  [1];  [1];  [1];  [2];  [1];  [1];  [1]; ORCiD logo [1];  [3];  [2];  [4];  [1]
  1. Chinese Academy of Sciences (CAS), Beijing (China)
  2. Tsinghua Univ., Beijing (China)
  3. Chinese Academy of Sciences (CAS), Beijing (China); Chinese Academy of Sciences, Ningbo, Zhejiang (China)
  4. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)

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.

Research Organization:
Energy Frontier Research Centers (EFRC) (United States). Center for Actinide Science & Technology (CAST); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Chemical Sciences, Geosciences, and Biosciences Division
Grant/Contract Number:
AC02-05CH11231; SC0016568
OSTI ID:
1546668
Journal Information:
Nature Communications, Vol. 10, Issue 1; ISSN 2041-1723
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 74 works
Citation information provided by
Web of Science

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