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Tuning the catalytic performance of metal-organic frameworks in fine chemistry by active site engineering

Journal of Materials Chemistry, ISSN: 1364-5501, Vol: 22, Issue: 20, Page: 10313-10321
2012
  • 183
    Citations
  • 0
    Usage
  • 145
    Captures
  • 0
    Mentions
  • 5
    Social Media
Metric Options:   Counts1 Year3 Year

Metrics Details

  • Citations
    183
    • Citation Indexes
      183
  • Captures
    145
  • Social Media
    5
    • Shares, Likes & Comments
      5
      • Facebook
        5

Article Description

The effect of a post-synthetic acid treatment on the catalytic performance of MOFs is evaluated for MIL-100(Fe), an iron-benzenetricarboxylate. The acid-treated frameworks are structurally robust as no differences have been found in XRD patterns after treatment. Porosity of the acid-treated MOFs gradually decreases, most probably as a consequence of anions remaining in the charged frameworks. Monitoring the modification of the MOFs by reactions of which the outcome depends on the acid properties of the catalyst suggests the presence of two types of active sites, with weak Brönsted acid sites in close vicinity to the Lewis acid open metal sites. This is supported by CO-chemisorption experiments which indicate a large increase of both Lewis and Brönsted acidity. In Diels-Alder reactions of oxygenated dienophiles with 1,3-cyclohexadiene, a strong increase of the activity is found for the acid-treated MOFs. This is explained by the enhanced activation of the dienophiles on the modified active sites. © 2012 The Royal Society of Chemistry.

Bibliographic Details

Frederik Vermoortele; Rob Ameloot; Luc Alaerts; Roman Matthessen; Bert Carlier; Enrique V. Ramos Fernandez; Jorge Gascon; Freek Kapteijn; Dirk E. De Vos

Royal Society of Chemistry (RSC)

Chemistry; Materials Science

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