Heterocycle‐Linked Covalent Organic Frameworks With Indazole Units for Cooperative H <sub>2</sub> O <sub>2</sub> Photosynthesis and Biomass Valorization
Abstract
ABSTRACT Developing artificial photosynthesis systems that couple hydrogen peroxide (H 2 O 2 ) production with organic valorization remains challenging due to rapid carrier recombination. Herein, indazole‐linked covalent organic frameworks (COFs) were constructed via Cadogan reductive cyclization of nitro‐functionalized imine‐linked precursors, which converts labile imine linkages into robust indazole linkages while preserving high crystallinity and enhancing visible‐light harvesting ability. Remarkably, in a synergistic system coupling H 2 O 2 production with furfuryl alcohol oxidation, indazole‐linked COFs exhibited a nearly 5.6‐fold enhancement in photocatalytic performance compared to its imine‐linked counterpart. Combined in situ DRIFTS and DFT calculations revealed that the indazole linkage optimizes interfacial reaction kinetics and facilitates substrate adsorption through polarized nitrogen sites. This work establishes heterocyclic linkage engineering as an effective strategy for designing advanced crystalline photocatalysts toward integrated solar energy conversion.
Article Details
Authors (9)
Shu‐Zhi Hu
Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material Engineering Jiangnan University Wuxi China
Meng‐Na Yue
Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material Engineering Jiangnan University Wuxi China
Yong Liu
Shi‐Wen Zhang
Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material Engineering Jiangnan University Wuxi China
Qian‐Rui Mao
Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material Engineering Jiangnan University Wuxi China
Mi Tian
Huan Pang
Wang‐Kang Han
Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material Engineering Jiangnan University Wuxi China
Zhi‐Guo Gu
Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material Engineering Jiangnan University Wuxi China