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 () and Yingjie Zhao ()
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Yuancheng Wang: Qingdao University of Science and Technology
Wenbo Hao: Qingdao University of Science and Technology
Hui Liu: Qingdao University of Science and Technology
Renzeng Chen: Qingdao University of Science and Technology
Qingyan Pan: Qingdao University of Science and Technology
Zhibo Li: Qingdao University of Science and Technology
Yingjie Zhao: Qingdao University of Science and Technology

Nature Communications, 2022, vol. 13, issue 1, 1-7

Abstract: 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.

Date: 2022
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DOI: 10.1038/s41467-021-27573-1

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