An explanation for the very large breathing effect of a metal-organic framework during CO2 adsorption
(2007) Advanced Materials — Vol. 19, n° 17, p. 2246-2251 (2007)
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- Abstract
- The very large breathing effect of a metal-organic framework during CO 2 adsorption is discussed. An experiment was conducted for the case of CO2 adsorption at room temperature for porous chromium (III) terephthalate MIL-53. The structural topology of MIL-53 consists of a 4 4 net with tilted chains of CrIIIO4(OH) 2 octahedra sharing trans hydroxyl groups solid. These chains are linked through the carboxylate groups of the terephthalate ions forming a 3D framework. An in situ solid-state NMR study of the hydration of MIL-53HT showed that the shrinkage that occurred upon insertion of water molecules resulted from the onset of two types of strong hydrogen bonds. The first type involves the hydrogen atoms of water molecules and the oxygen atoms of the bridging carboxylate groups. The second type, which seems to be more energetically favorable, links OH groups to inserted water molecules.
- Affiliations
ESRF, Grenoble (France) Chimie
Citations
Serre, C., Bourrelly, S., Vimont, A., Ramsahye, N. A., Maurin, G., Llewellyn, P. L., Daturi, M., Filinchuk, Y., Leynaud, O., Barnes, P., & Férey, G. (2007). An explanation for the very large breathing effect of a metal-organic framework during CO2 adsorption. Advanced Materials, 19(17), 2246-2251. https://doi.org/10.1002/adma.200602645 (Original work published 2007)