The behavior of flexible MIL-53(Al) upon CH4 and CO2 adsorption

Anne Boutin, Françcois Xavier Coudert, Marie Anne Springuel-Huet, Alexander V. Neimark, Gérard Férey, Alain H. Fuchs

Research output: Contribution to journalArticlepeer-review

142 Scopus citations

Abstract

The use of the osmotic thermodynamic model, combined with a series of methane and carbon dioxide gas adsorption experiments at various temperatures, has allowed shedding some new light on the fascinating phase behavior of flexible MIL-53(Al) metal-organic frameworks. A generic temperature-loading phase diagram has been derived; it is shown that the breathing effect in MIL-53 is a very general phenomenon, which should be observed in a limited temperature range regardless of the guest molecule. In addition, the previously proposed stress model for the structural transitions of MIL-53 is shown to be transferable from xenon to methane adsorption. The stress model also provides a theoretical framework for understanding the existence of lp/np phase mixtures at pressures close to the breathing transition pressure, without having to invoke an inhomogeneous distribution of the adsorbate in the porous sample.

Original languageEnglish (US)
Pages (from-to)22237-22244
Number of pages8
JournalJournal of Physical Chemistry C
Volume114
Issue number50
DOIs
StatePublished - Dec 23 2010

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Energy(all)
  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films

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