Unusual adsorption behavior on metal-organic frameworks

David Fairen-Jimenez, Nigel A. Seaton, Tina Düren

Research output: Contribution to journalArticlepeer-review

45 Citations (Scopus)

Abstract

Metal-organic frameworks (MOFs) have shown adsorption behavior that is not observed in other microporous materials such as zeolites or activated carbons. This study used grand canonical Monte Carlo simulation to evaluate a particular form of behavior, which corresponds to the presence of unusual type V adsorption isotherms. Study of a series of MOFs in the IRMOF family, containing chemically similar linkers of different length, showed that the presence of type V adsorption depends on a fine balance between the strength of the fluid-fluid and fluid-solid interactions, which in turn is a strong function of the length of the linker and therefore the pore size. A transition from type V behavior to the more common type I behavior is observed as the temperature increases. The temperature at which this transition occurs increases, and the transition becomes more diffuse, as the length of the linker increases. This type V behavior leads to an interesting possibility in the design of MOF adsorbents for use in gas separation and gas storage applications.

Original languageEnglish
Pages (from-to)14694-14699
Number of pages6
JournalLangmuir
Volume26
Issue number18
Early online date26 Aug 2010
DOIs
Publication statusPublished - 21 Sep 2010

ASJC Scopus subject areas

  • Electrochemistry
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Materials Science(all)
  • Spectroscopy

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