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Olefin-linked covalent organic frameworks with twisted tertiary amine knots for enhanced ultraviolet detection
Chinese Chemical Letters  (IF),  Pub Date : 2021-09-30, DOI: 10.1016/j.cclet.2021.09.082
Qianying Guo, Hongyan Ji, Lei Yang, Daizong Ji, Zhaolin Ai, Shi Luo, Jiatao Sun, Yunqi Liu, Dacheng Wei

Though Olefin-linked covalent organic frameworks (oCOFs) possess excellent π-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 possibility of aggregation-caused quenching. Photoelectrical measurements and electric band structure calculation both verify the superiority of this oCOFs’ structure in photoelectric sensing.