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[email protected] : inclusion of POMs in ionic liquid modified MOFs to produce recyclable oxidation catalysts

Authors
  • Abednatanzi, Sara
  • Leus, Karen
  • Gohari Derakhshandeh, Parviz
  • Nahra, Fady
  • De Keukeleere, Katrien
  • Van Hecke, Kristof
  • Van Driessche, Isabel
  • Abbasi, Alireza
  • Nolan, Steven
  • Van Der Voort, Pascal
Publication Date
Jan 01, 2017
Identifiers
DOI: 10.1039/c6cy02662a
OAI: oai:archive.ugent.be:8519708
Source
Ghent University Institutional Archive
Keywords
Language
English
License
Unknown
External links

Abstract

In this study, we present for the first time the immobilization of phosphotungstic acid (H3PW12O40, HPW) into the nanocages of a dual amino-functionalized ionic liquid (DAIL)-modified MIL-101(Cr) framework under mild conditions. The obtained PW/DAIL/MIL-101(Cr) was evaluated as a catalyst in the oxidation of benzyl alcohol using TBHP in chloroform. In order to obtain insights into the role of the DAIL during catalysis, a DAIL-free catalyst (HPW/MIL-101(Cr)) was also prepared. Both catalysts were fully characterized using several techniques. In comparison with the HPW/MIL-101(Cr) material, PW/DAIL/MIL-101(Cr) showed an enhanced catalytic performance in the selective oxidation of benzyl alcohol. This was mainly attributed to the ability of the DAIL groups to form hydrogen bonds, thus enhancing the accessibility of TBHP. Further-more, the immobilization of the DAIL groups onto MIL-101(Cr) resulted in increased thermal stability of the obtained PW/DAIL/MIL-101(Cr) which showed stability up to 400 degrees C. Moreover, the PW/DAIL/MIL-101(Cr) catalyst exhibited good recyclability and selectivity. The catalyst could be reused for at least five cycles with no significant leaching of the tungsten species or loss of crystallinity and activity.

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