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Bifunctional metal-organic frameworks for the hydrogenation of nitrophenol using methanol as the hydrogen source. | LitMetric

Bifunctional metal-organic frameworks for the hydrogenation of nitrophenol using methanol as the hydrogen source.

Org Biomol Chem

Departamento de Química, Universitat Politècnica de València, Camino de Vera s/n, Valencia 46022, Spain. and Instituto Universitario de Tecnología Química, CSIC-UPV, Universitat Politècnica de València, Av. de los Naranjos, Valencia 46022, Spain.

Published: January 2021

AI Article Synopsis

Article Abstract

This work reports the reduction of 4-nitrophenol to 4-aminophenol using UiO-66(Zr) as a bifunctional photocatalyst and hydrogenation catalyst using methanol as the hydrogen source. In particular, a series of UiO-66(Zr)-X (X: NH, NO and H) and MIL-125(Ti)-NH catalysts have been screened as bifunctional catalysts for this process. UiO-66(Zr)-NH was found to be the most active material to promote light-assisted nitro hydrogenation under both UV-Vis and simulated sunlight irradiation. The tandem reaction occurs via hydrogen generation from a water/methanol mixture in the first step and, then, reduction of 4-nitrophenol to 4-aminophenol. UiO-66(Zr)-NH acts as a truly heterogeneous catalyst and can be reused several times without significant loss of activity, maintaining its crystallinity. This work shows the possibility of using MOFs as solar-driven bifunctional catalysts to promote the hydrogenation of organic compounds using methanol as the hydrogen source.

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http://dx.doi.org/10.1039/d0ob01686aDOI Listing

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