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Neutron Diffraction Structural Study of CO2 Binding in Mixed-Metal CPM-200 Metal-Organic Frameworks



Anthony J. Campanella, Benjamin Trump, Eric J. Gosselin, Eric D. Bloch, Craig Brown


Metal-organic frameworks featuring open metal coordination sites have been widely studied for the separation of gas mixtures. For CO2/N2 separations, these materials have shown considerable promise. Herein, we report the characterization of a subset of the well-known PCN-250 class of frameworks upon CO2 adsorption via powder neutron diffraction methods. Noteably, in contrast to previously reported data, they display only moderate CO2 adsorption enthalpies, based on metal cation-CO2 interactions. Further, we show charge balance in these materials is likely achieved via ligand vacancies rather than the presence of υ3-OH groups in the trimetallic cluster that comprises them.
Chemical Communications


Metal Organic Frameworks, Adsorption, Neutron Diffraction, Gas Dosing


Campanella, A. , Trump, B. , Gosselin, E. , Bloch, E. and Brown, C. (2020), Neutron Diffraction Structural Study of CO<sub>2</sub> Binding in Mixed-Metal CPM-200 Metal-Organic Frameworks, Chemical Communications, [online], (Accessed April 24, 2024)
Created February 27, 2020, Updated October 12, 2021