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 

机构地区：[1]Department of Chemistry,Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials,Fudan University,Shanghai 200438,China [2]College of Chemistry,Zhengzhou University,Zhengzhou 450001,China

出　　处：《Chinese Chemical Letters》2022年第4期1988-1992,共5页中国化学快报（英文版）

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

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].

关 键 词：Polycatenation Flexible organic framework Dynamic covalent chemistry uril BIPYRIDINIUM Radical cation 

分 类 号：TQ317[化学工程—高聚物工业]