RT Journal Article T1 Molecular Mechanisms for Adsorption in Cu-BTC Metal Organic Framework A1 Gutiérrez Sevillano, Juan José A1 Vincent-Luna, J.M A1 Dubbeldam, David A1 Calero, Sofía K1 Molecular simulation K1 MOFs K1 Adsorption K1 Cu-BTC AB We use molecular simulations to analyze the preferential adsorption sites of molecules that differ in size, shape, and polarizability in Cu-BTC metal organic framework. The cage system of the framework can be exploited to enhance adsorption of small gases. We find that nonpolar molecules adsorb preferentially in the small tetrahedral cages, whereas alcohols and water molecules adsorb close to the copper atoms in one of the big cages. Blocking potentially enhances selective adsorption and separation and we therefore investigate how to block these cages in a practical manner. We propose to use ionic liquids for it and we find that the addition of these components reduces the adsorption of polar molecules near the open metal centers. For this reason, the presence of ionic liquids reduces the attack of the molecules of water to the metallic centers improving the framework stability. PB American Chemical Society YR 2013 FD 2013-04-29 LK https://hdl.handle.net/10433/19999 UL https://hdl.handle.net/10433/19999 LA en NO J. Phys. Chem. C 2013, 117, 21, 11357–11366 NO This work is supported by the Spanish MICINN (CTQ2010-16077), The Netherlands Research Council for Chemical Sciences (NWO/CW) through a VIDI grant (D. Dubbeldam), and by the European Research Council through an ERC Starting Grant (S. Calero). J.J.G.S. thanks MEC (CTQ2007- 63229) for his predoctoral fellowship. NO This document is the Accepted Manuscript version of a Published Work that appeared in final form in: J. Phys. Chem. C 2013, 117, 21, 11357–11366Publication Date:April 29, 2013https://doi.org/10.1021/jp401017uCopyright © 2013 American Chemical Society NO Sistemas Físicos, Químicos y Naturales DS RIO RD Apr 23, 2026