Stability and hydrolyzation of metal organic frameworks with paddle-wheel SBUs upon hydration

Kui Tan, Nour Nijem, Pieremanuele Canepa, Qihan Gong, Jing Li, Timo Thonhauser, Yves J. Chabal

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Abstract

Instability of most prototypical metal organic frameworks (MOFs) in the presence of moisture is always a limitation for industrial scale development. In this work, we examine the dissociation mechanism of microporous paddle wheel frameworks M(bdc)(ted)0.5 [M = Cu, Zn, Ni, Co; bdc = 1,4-benzenedicarboxylate; ted = triethylenediamine] in controlled humidity environments. Combined in situ IR spectroscopy, Raman, and Powder X-ray diffraction measurements show that the stability and modification of isostructual M(bdc)(ted)0.5 compounds upon exposure to water vapor critically depend on the central metal ion. A hydrolysis reaction of water molecules with Cu-O-C is observed in the case of Cu(bdc)(ted)0.5. Displacement reactions of ted linkers by water molecules are identified with Zn(bdc)(ted)0.5 and Co(bdc)(ted)0.5. In contrast,. Ni(bdc)(ted)0.5 is less susceptible to reaction with water vapors than the other three compounds. In addition, the condensation of water vapors into the framework is necessary to initiate the dissociation reaction. These findings, supported by supported by first principles theoretical van der Waals density functional (vdW-DF) calculations of overall reaction enthalpies, provide the necessary information for determining operation conditions of this class of MOFs with paddle wheel secondary building units and guidance for developing more robust units.

Original languageEnglish
Pages (from-to)3153-3167
Number of pages15
JournalChemistry of Materials
Volume24
Issue number16
DOIs
Publication statusPublished - Aug 28 2012

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Keywords

  • Raman
  • X-ray diffraction
  • hydration
  • in situ IR spectroscopy
  • metal organic frameworks
  • paddle wheel
  • secondary building units

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Materials Chemistry

Cite this

Tan, K., Nijem, N., Canepa, P., Gong, Q., Li, J., Thonhauser, T., & Chabal, Y. J. (2012). Stability and hydrolyzation of metal organic frameworks with paddle-wheel SBUs upon hydration. Chemistry of Materials, 24(16), 3153-3167. https://doi.org/10.1021/cm301427w