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Selective sorption of organic molecules by the flexible porous hybrid metal-organic framework MIL-53(Fe) controlled by various host-guest interactions
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Millange, Franck, Guillou, Nathalie, Medina, Manuela E., Ferey, Gerard, Carlin-Sinclair, Abel, Golden, Kathryn M. and Walton, Richard I. (2010) Selective sorption of organic molecules by the flexible porous hybrid metal-organic framework MIL-53(Fe) controlled by various host-guest interactions. Chemistry of Materials, Vol.22 (No.14). pp. 4237-4245. doi:10.1021/cm1008587 ISSN 0897-4756.
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Official URL: http://dx.doi.org/10.1021/cm1008587
Abstract
The structures of four iron(III) carboxylate materials with the MIL-53 structure and the guest molecules water, pyridine, or 2,6-dimethylpyridine (2,6-lutidine) have been solved and refined from high-resolution powder X-ray diffraction data. These materials have porous structures constructed from infinite chains of trans-corner-shared {FeO4(OH,F)(2)} octahedra cross-linked by benzene-dicarboxylate ligands. With pyridine, the unit cell is partially expanded with respect to the hydrated phase, with hydrogen bonds between N donors and OH framework atoms, whereas with lutidine, water is co-sorbed to give a fully expanded version of the MIL-53(Fe) structure in which water molecules bridge the N donors of the organic molecule and the framework OH groups by hydrogen bonding. Careful dehydration of MIL-53(Fe)[2,6-lutidine,H2O] provides a new material, MIL-53(Fe)[2,6-lutidine(0.5)], with an intermediate unit cell volume: in this case no host guest hydrogen bonds are formed. Time-resolved in situ energy-dispersive X-ray diffraction shows that when exposed to an aqueous mixture of pyridine and 2,6-lutidine the hydrated MIL-53(Fe) takes up both guest molecules initially to give two distinct phases, but the ultimate product is only MIL-53(Fe)[2,6-lutidi ne, H2O].
| Item Type: | Journal Article | ||||
|---|---|---|---|---|---|
| Subjects: | Q Science > QD Chemistry | ||||
| Divisions: | Faculty of Science, Engineering and Medicine > Science > Chemistry | ||||
| Library of Congress Subject Headings (LCSH): | Layered double hydroxides, Adsorption, X-rays -- Diffraction, Porous materials, Ligand binding (Biochemistry), Molecular association | ||||
| Journal or Publication Title: | Chemistry of Materials | ||||
| Publisher: | American Chemical Society | ||||
| ISSN: | 0897-4756 | ||||
| Official Date: | 27 July 2010 | ||||
| Dates: |
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| Volume: | Vol.22 | ||||
| Number: | No.14 | ||||
| Number of Pages: | 9 | ||||
| Page Range: | pp. 4237-4245 | ||||
| DOI: | 10.1021/cm1008587 | ||||
| Status: | Peer Reviewed | ||||
| Publication Status: | Published | ||||
| Access rights to Published version: | Restricted or Subscription Access | ||||
| Funder: | Centre national de la recherche scientifique (France), France. Agence nationale de la recherche (ANR) |
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