Facile construction of fully sp2-carbon conjugated two-dimensional covalent organic frameworks containing benzobisthiazole units

Yuancheng Wang; Wenbo Hao; Hui Liu; Renzeng Chen; Qingyan Pan; Zhibo Li; Yingjie Zhao

doi:10.1038/s41467-021-27573-1

Facile construction of fully sp²-carbon conjugated two-dimensional covalent organic frameworks containing benzobisthiazole units

Nat Commun. 2022 Jan 10;13(1):100. doi: 10.1038/s41467-021-27573-1.

Authors

Yuancheng Wang¹, Wenbo Hao¹, Hui Liu¹, Renzeng Chen¹, Qingyan Pan¹, Zhibo Li², Yingjie Zhao³

Affiliations

¹ College of Polymer Science and Engineering, Qingdao University of Science and Technology, Qingdao, 266042, China.
² College of Polymer Science and Engineering, Qingdao University of Science and Technology, Qingdao, 266042, China. zbli@qust.edu.cn.
³ College of Polymer Science and Engineering, Qingdao University of Science and Technology, Qingdao, 266042, China. yz@qust.edu.cn.

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^-1g^-1 under visible light irradiation.

Abstract

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