A detailed description of the CO molecule adsorbed in InOF-1.

Phys Chem Chem Phys

Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México, Circuito Exterior S. N., Ciudad Universitaria, CP 04510, CDMX, Mexico.

Published: April 2020

CO is extremely toxic to humans since it can combine with haemoglobin to form carboxy-haemoglobin that reduces the oxygen-carrying capacity of blood. Metal-organic frameworks (MOFs), in particular InOF-1, are currently receiving preferential attention for the separation and capture of CO. In this investigation we report a theoretical study based on periodic density-functional-theory (DFT) analysis and matching experimental results (in situ DRIFTS). The aim of this article is to describe the non-covalent interactions between the functional groups of InOF-1 and the CO molecule since they are crucial to understand the adsorption mechanism of these materials. Our results show that the CO molecule mainly interacts with the μ2-OH hydroxo groups of InOF-1 through O-HO hydrogen bonds, and Cπ interactions by the biphenyl rings of the MOF. These results provide useful information on the CO adsorption mechanisms in InOF-1.

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http://dx.doi.org/10.1039/d0cp00579gDOI Listing

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