Conjugated-engineering covalent organic framework for synergistic artificial photosynthesis of hydrogen peroxide and high-value chemicals

Abstract

Artificial photosynthesis holds great promise for the production of hydrogen peroxide (H₂O₂), an environmentally friendly oxidant and clean fuel. However, the synergistic photosynthesis of H₂O₂ and high-value chemicals in blue light-emitting diodes (LEDs) has not yet been realized. Herein, we develop a conjugated-engineering covalent organic framework (COF), designated as TANB-Py-COF, which serves as an efficient catalyst in the photosynthesis of H₂O₂ under blue LEDs. An apparent quantum yield of 7.87% and a H₂O₂ production rate of 18.32 mmol g^-1 h^-1 are achieved. In addition, the synergistic photosynthesis of imines via amine-coupling or photooxidation of thioethers is realized with a yield up to 99%. This work establishes a precedent for the development of COF-based photocatalytic strategies for the simultaneous artificial photosynthesis of hydrogen peroxide and high-value chemicals in blue LEDs.

Keywords

Artificial photosynthesis / covalent organic framework / generation of hydrogen peroxide / high-value chemicals

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