Synthesis modulation as a tool to increase the catalytic activity of metal-organic frameworks: the unique case of UiO-66(Zr)

The catalytic activity of the zirconium terephthalate UiO-66(Zr) can be drastically increased by using a modulation approach. The combined use of trifluoroacetic acid and HCl during the synthesis results in a highly crystalline material, with partial substitution of terephthalates by trifluoroacetat...

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Published in:Journal of the American Chemical Society Vol. 135; no. 31; p. 11465
Main Authors: Vermoortele, Frederik, Bueken, Bart, Le Bars, Gaëlle, Van de Voorde, Ben, Vandichel, Matthias, Houthoofd, Kristof, Vimont, Alexandre, Daturi, Marco, Waroquier, Michel, Van Speybroeck, Veronique, Kirschhock, Christine, De Vos, Dirk E
Format: Journal Article
Language:English
Published: United States 07.08.2013
ISSN:1520-5126, 1520-5126
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Summary:The catalytic activity of the zirconium terephthalate UiO-66(Zr) can be drastically increased by using a modulation approach. The combined use of trifluoroacetic acid and HCl during the synthesis results in a highly crystalline material, with partial substitution of terephthalates by trifluoroacetate. Thermal activation of the material leads not only to dehydroxylation of the hexanuclear Zr cluster but also to post-synthetic removal of the trifluoroacetate groups, resulting in a more open framework with a large number of open sites. Consequently, the material is a highly active catalyst for several Lewis acid catalyzed reactions.
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ISSN:1520-5126
1520-5126
DOI:10.1021/ja405078u