Regulating Benzothiadiazole-Based Covalent–Organic Frameworks to Boost Hydrogen Peroxide Photosynthesis and Pathogenic Bacterial Elimination
Wenbin Zhong, Wang‐Kang Han, Shuai Bi, Xinkun Ma, Chu Wang, Yinglong Wu, Ting He, Zidan Zhang, Jingjing Guo, Yanli Zhao
Abstract
Benzothiadiazole offers an effective charge transfer channel and serves as a suitable unit for constructing donor–acceptor (D–A) covalent–organic frameworks (COFs), yet systematic investigation on benzothiadiazole-containing COFs is still rare. Herein, we construct four highly crystalline COFs and carefully explore their H 2 O 2 photosynthetic efficiency. Changing the donor unit from phenyl to naphthalenyl group effectively enhances the H 2 O 2 yield rate by nearly 3-fold, highlighting the importance of regulating D–A configuration. The optimized COF (BTpaNda) presents a high H 2 O 2 yield rate of 10,122 μmol g –1 h –1 . Theoretical calculations reveal that BTpaNda COF has the lowest Gibbs free energy in rate-determining oxygen-containing intermediate formation, corroborating the superb H 2 O 2 photosynthesis. Furthermore, the BTpaNda COF demonstrates good stability and excellent bacterial elimination effects with the involvement of oxygen-containing intermediates. Thus, the structural regulation of benzothiadiazole-containing COFs on photocatalytic H 2 O 2 generation and cascade bacterial elimination with oxygen-containing intermediate generation is demonstrated.