Knoevenagel冷凝
共轭体系
共价有机骨架
电子受体
接受者
光催化
共价键
结合
光化学
材料科学
聚合物
化学
组合化学
纳米技术
有机化学
催化作用
物理
数学分析
数学
凝聚态物理
作者
Yuancheng Wang,Wenbo Hao,Hui Liu,Renzeng Chen,Qingyan Pan,Zhibo Li,Yingjie Zhao
标识
DOI:10.1038/s41467-021-27573-1
摘要
Abstract Developing a facile strategy for the construction of vinylene-linked fully π -conjugated covalent organic frameworks (COFs) remains a huge challenge. Here, a versatile condition of Knoevenagel polycondensation for constructing vinylene-linked 2D COFs was explored. Three new examples of vinylene-linked 2D COFs ( BTH-1 , 2 , 3 ) containing benzobisthiazoles units as functional groups were successfully prepared under this versatile and mild condition. The electron-deficient benzobisthiazole units and cyano-vinylene linkages were both integrated into the π conjugated COFs skeleton and acted as acceptor moieties. Interestingly, we found the construction of a highly ordered and conjugated D-A system is favorable for photocatalytic activity. BTH-3 with benzotrithiophene as the donor with a strong D-A effect exhibited an attractive photocatalytic HER of 15.1 mmol h −1 g −1 under visible light irradiation.
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