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• W4384698526 abstract "Abstract The keto‐switched photocatalysis of covalent organic frameworks (COFs) for efficient H 2 evolution was reported for the first time by engineering, at a molecular level, the local structure and component of the skeletal building blocks. A series of imine‐linked BT‐COFs were synthesized by the Schiff‐base reaction of 1, 3, 5‐benzenetrialdehyde with diamines to demonstrate the structural reconstruction of enol to keto configurations by alkaline catalysis. The keto groups of the skeletal building blocks served as active injectors, where hot π‐electrons were provided to Pt nanoparticles (NPs) across a polyvinylpyrrolidone (PVP) insulting layer. The characterization results, together with density functional theory calculations, indicated clearly that the formation of keto‐injectors not only made the conduction band level more negative, but also led to an inhomogeneous charge distribution in the donor‐acceptor molecular building blocks to form a strong intramolecular built‐in electric field. As a result, visible‐light photocatalysis of TP‐COFs‐1 with one keto group in the skeletal building blocks was successfully enabled and achieved an impressive H 2 evolution rate as high as 0.96 mmol g −1 h −1 . Also, the photocatalytic H 2 evolution rates of the reconstructed BT‐COFs‐2 and ‐3 with two and three keto‐injectors were significantly enhanced by alkaline post‐treatment." @default.
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• W4384698526 date "2023-07-27" @default.
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• W4384698526 title "The Keto‐Switched Photocatalysis of Reconstructed Covalent Organic Frameworks for Efficient Hydrogen Evolution" @default.
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• W4384698526 doi "https://doi.org/10.1002/ange.202309026" @default.
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