Probing the Lewis Acidity and Catalytic Activity of the Metal-Organic Framework [Cu3(btc)2] (BTC=Benzene-1,3,5-tricarboxylate)

An optimized procedure was designed for the preparation of the microporous metal–organic framework (MOF) [Cu3(btc)2] (BTC=benzene‐1,3,5‐tricarboxylate). The crystalline material was characterized by X‐ray diffraction, optical microscopy, SEM, X‐ray photoelectron spectroscopy, N2 sorption, thermograv...

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Vydáno v:Chemistry : a European journal Ročník 12; číslo 28; s. 7353 - 7363
Hlavní autoři: Alaerts, Luc, Séguin, Etienne, Poelman, Hilde, Thibault-Starzyk, Frédéric, Jacobs, Pierre A., De Vos, Dirk E.
Médium: Journal Article
Jazyk:angličtina
Vydáno: Weinheim WILEY-VCH Verlag 25.09.2006
WILEY‐VCH Verlag
Wiley
Wiley-VCH Verlag
Témata:
carbon monoxide
Chemical Sciences
Chemistry
Chemistry, Multidisciplinary
heterogeneous catalysis
IR spectroscopy
Lewis acids
metal-organic frameworks
Physical Sciences
Science & Technology
DESIGN
heterogeneous catalysis
STABILITY
ISOMERIZATION
carbon monoxide
Lewis acids
IR spectroscopy
metal-organic frameworks
REARRANGEMENT
(+)CITRONELLAL
ALPHA-PINENE OXIDE
SITES
ZEOLITES
COORDINATION POLYMERS
2-BROMOPROPIOPHENONE
ISSN:0947-6539, 1521-3765
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Popis
Shrnutí:An optimized procedure was designed for the preparation of the microporous metal–organic framework (MOF) [Cu3(btc)2] (BTC=benzene‐1,3,5‐tricarboxylate). The crystalline material was characterized by X‐ray diffraction, optical microscopy, SEM, X‐ray photoelectron spectroscopy, N2 sorption, thermogravimetry, and IR spectroscopy of adsorbed CO. CO adsorbs on a small number of Cu2O impurities, and particularly on the free CuII coordination sites in the framework. [Cu3(btc)2] is a highly selective Lewis acid catalyst for the isomerization of terpene derivatives, such as the rearrangement of α‐pinene oxide to campholenic aldehyde and the cyclization of citronellal to isopulegol. By using the ethylene ketal of 2‐bromopropiophenone as a test substrate, it was demonstrated that the active sites in [Cu3(btc)2] are hard Lewis acids. Catalyst stability, re‐usability, and heterogeneity are critically assessed. A systematic study of the catalytic properties of a metal‐organic framework: [Cu3(btc)2] is a very selective catalyst for specific isomerizations of terpenes, terpene epoxides, and ketals (see scheme). Together with IR spectroscopic measurements on adsorbed probe molecules, this proves the hard Lewis acid properties of the material.
Bibliografie:ArticleID:CHEM200600220
ark:/67375/WNG-1T4WDS59-4
istex:6762C5E658F2F4A3A682DFE1D23C96500C78DBC0
ISSN:0947-6539
1521-3765
DOI:10.1002/chem.200600220