Olefin-linked covalent organic frameworks with twisted tertiary amine knots for enhanced ultraviolet detection  

作　　者：Qianying Guo Hongyan Ji Lei Yang Daizong Ji Zhaolin Ai Shi Luo Jiatao Sun Yunqi Liu Dacheng Wei 

机构地区：[1]State Key Laboratory of Molecular Engineering of Polymers,Department of Macromolecular Science,Fudan University,Shanghai 200433,China [2]Institute of Molecular Materials and Devices,Fudan University,Shanghai 200433,China [3]MIIT Key Laboratory for Low-Dimensional Quantum Structure and Devices,Beijing Institute of Technology,Beijing 100081,China

出　　处：《Chinese Chemical Letters》2022年第5期2621-2624,共4页中国化学快报（英文版）

基　　金：supported by the National Key R&D Program of China(Nos.2021YFE0201400,2018YFA0703200,2020YFA0308800);National Natural Science Foundation of China(Nos.51773041,61890940,21603038,11974045);Shanghai Com-mittee of Science and Technology in China(No.18ZR1404900).

摘　　要：Though Olefin-linked covalent organic frameworks(oCOFs)possess excellentπ-electron delocalization,the barely reversible olefin linkage brings challenges for oCOFs’synthesis and functionalization.Here,we synthesize new oCOFs with tertiary amine knots which have twisted configuration and electron-donating nature.Investigation into the structural variation and photoelectric performance shows that the twisted configuration of oCOF-TFPA could favor to the intramolecular charge transfer process and reduce the pos-sibility of aggregation-caused quenching.Photoelectrical measurements and electric band structure cal-culation both verify the superiority of this oCOFs’structure in photoelectric sensing.

关 键 词：Covalent organic frameworks Olefin linkages Tertiary amine knots Twisted intramolecular charge transfer effect Ultraviolet detection 

分 类 号：O641.4[理学—物理化学]