Faculty Collaboration Database

Anion-adaptive crystalline cationic material for ⁹⁹TcO₄^- trapping. Nat Commun 2019 Apr 04;10(1):1532

Date

04/06/2019

Pubmed ID

30948745

Pubmed Central ID

PMC6449352

DOI

10.1038/s41467-019-09504-3

Scopus ID

2-s2.0-85064012510 (requires institutional sign-in at Scopus site)   85 Citations

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.

Author List

Mei L, Li FZ, Lan JH, Wang CZ, Xu C, Deng H, Wu QY, Hu KQ, Wang L, Chai ZF, Chen J, Gibson JK, Shi WQ

Author

Ling Mei MD Associate Professor in the Medicine department at Medical College of Wisconsin