Cucurbit[7]uril-threaded flexible organic frameworks: Quantitative polycatenation through dynamic covalent chemistry

作     者：Qian Li Jian-Da Sun Bo Yang Hui Wang Dan-Wei Zhang Da Ma Zhan-Ting Li Qian Li;Jian-Da Sun;Bo Yang;Hui Wang;Dan-Wei Zhang;Da Ma;Zhan-Ting Li

作者机构：Department of ChemistryShanghai Key Laboratory of Molecular Catalysis and Innovative MaterialsFudan UniversityShanghai 200438China College of ChemistryZhengzhou UniversityZhengzhou 450001China 

出 版 物：《Chinese Chemical Letters》 (中国化学快报（英文版）)

年 卷 期：2022年第33卷第4期

页      面：1988-1992页

核心收录：

学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0703[理学-化学] 

基　　金：financially supported by the National Natural Science Foundation of China (Nos. 21890732  21890730 and21921003) 

主　　题：Polycatenation Flexible organic framework Dynamic covalent chemistry Cucurbituril Bipyridinium Radical cation 

摘      要：A three-dimensional flexible organic framework FOF-1 has been synthesized from the condensation of a tetratopic acylhydrazine and a rigid 4,4-diphenyl-4,4-bipyridinium dialdehyde in water through the quantitative formation of hydrazone bond. FOF-1 is further applied to construct a polycatenane framework FOF-pc-1 through the quantitative cucurbit[7]uril encapsulation for the diphenylbipyridinium subunits of the framework by making use of the dynamic nature of the hydrazone bond in water. The bipyridinium subunits in both frameworks can be reduced their radical cation counterparts to produce conjugated radical cation-linked dynamic organic frameworks rc-FOF-1 or rc-FOF-pc-1. Polycatenation is revealed to enhance the stability of the dynamic frameworks in water, whereas depolycatenation can be reached for both FOF-pc-1 and rc-FOF-pc-1 by using a ferrocene guest to form a more stable complex with CB[7].