Synthesis Modulation as a Tool To Increase the Catalytic Activity of Metal鈥揙rganic Frameworks: The Unique Case of UiO-66(Zr)

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• 作者：Frederik Vermoortele ; Bart Bueken ; Ga毛lle Le Bars ; Ben Van de Voorde ; Matthias Vandichel ; Kristof Houthoofd ; Alexandre Vimont ; Marco Daturi ; Michel Waroquier ; Veronique Van Speybroeck ; Christine Kirschhock ; Dirk E. De Vos
• 刊名：The Journal of the American Chemical Society
• 出版年：2013
• 出版时间：August 7, 2013
• 年：2013
• 卷：135
• 期：31
• 页码：11465-11468
• 全文大小：232K
• 年卷期：v.135,no.31(August 7, 2013)
• ISSN：1520-5126

文摘

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.