Wang S, Li S, Feng H, Yang W, Feng YS. Visible-Light-Driven Porphyrin-Based Bimetallic Metal-Organic Frameworks for Selective Photoreduction of Nitro Compounds under Mild Conditions.
ACS APPLIED MATERIALS & INTERFACES 2023;
15:4845-4856. [PMID:
36629327 DOI:
10.1021/acsami.2c22686]
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Abstract
Selective reduction of nitroaromatics to the corresponding amines generally requires complex conditions, involving pressurized hydrogen, higher temperatures, or organic acids. In this work, we successfully prepared a series of porphyrin-based MOF photocatalysts (Pd-PMOFs, In-PMOFs, and In/Pd-PMOFs) via a facile solvothermal method for the efficient selective reduction of nitroaromatics to corresponding anilines with deionized water as the hydrogen donor. Being a new structured material (monoclinic, C52H40InN6O8Pd), on account of the abundant pore channels, strong light absorption capability, well-matched bandgap, as well as the coordination of indium ions and palladium ions, In/Pd-MOFs have excellent migration efficiency of photo-induced electrons and holes. Specifically, the In/Pd-PMOF photocatalyst manifested superior conversion (100%) and selectivity (≥80%) toward the screened nitro compounds under mild conditions. This work avoids the use of strong reductants, organic acids, and pressurized hydrogen gas as hydrogen sources, providing a promising concept for developing green catalytic systems.
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