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Ultra-highly selective trapping of perrhenate/pertechnetate by a flexible cationic coordination framework
Cheng-Peng Li1, Jin-Yun Ai, Hang Zhou
1College of Chemistry, Tianjin Key Laboratory of Structure and Performance for Functional Molecules, MOE Key Laboratory of Inorganic-Organic Hybrid Functional Material Chemistry, Tianjin Normal University, Tianjin 300387, China. hxxydm@tjnu.edu.cn.
Abstract:
The selective binding and trapping of perrhenate/pertechnetate is of great interest in the contamination remediation of nuclear waste. Herein, we report a cationic metal-organic framework (TJNU-216, TJNU = Tianjin Normal University), with ultra-high selectivity in trapping perrhenate/pertechnetate in the presence of a large excess of SO42- (20 000 times) or NO3- (300 times), and the highest exchange capacity of 417 mg g-1 (1 mol mol-1). The exchange mechanism can be confirmed by the crystal structure of TJNU-216(Re) via single-crystal-to-single-crystal transformation.
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