1. Light-driven H2O2 production over redox-active imine-linked covalent organic frameworks.
- Author
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Songlin Zhang, Jinwen Hu, Wenzhe Shang, Jingya Guo, Xusheng Cheng, Suchan Song, Tianna Liu, Wei Liu, and Yantao Shi
- Subjects
IMINES ,PHOTOCATALYSIS ,ELECTRONS ,NUCLEAR magnetic resonance ,CHEMICAL reactions - Abstract
Imine-linked covalent organic frameworks (COFs) provide distinctive prospects for promoting photocatalytic H
2 O2 production, yet the intricate involvement of imine-derived linkages chemistry under light irradiation remains incompletely elucidated. Here, imine-linked COF-LZU1 demonstrates a visible light-driven H2 O2 evolution rate of 387 μmol g-1 h-1 , particularly, negligible dependence on the sacrificial agents. By virtue of electron paramagnetic spectroscopy and solid-state nuclear magnetic resonance, we experimentally tracked the structure evolution and identified its autooxidation to Wurster's salt mimics under the photocatalytic conditioning. This finding coincides with the radical anion ·O2 - governed reaction pathway and is further rationalized with additional theoretical calculations. This study provides insights into both photophysical/photochemical aspects over the imine-linkage structure. [ABSTRACT FROM AUTHOR]- Published
- 2024
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