Assessing guest diffusivities in porous hosts from transient concentration profiles

Lars Heinke, Despina Tzoulaki, Christian Chmelik, Florian Hibbe, Jasper M. Van Baten, Hyuna Lim, Jing Li, Rajamani Krishna, Jörg Kärger

Research output: Contribution to journalArticle

56 Citations (Scopus)

Abstract

Using the short-chain-length alkanes from ethane to n-butane as guest molecules, transient concentration profiles during uptake or release (via interference microscopy) and tracer exchange (via IR microimaging) in Zn(tbip), a particularly stable representative of a novel family of nanoporous materials (the metal organic frameworks), were recorded. Analyzing the spatiotemporal dependence of the profiles provides immediate access to the transport diffusivities and self-diffusivities, yielding a data basis of unprecedented reliability for mass transfer in nanoporous materials. As a particular feature of the system, self- and transport diffusivities may be combined to estimate the rate of mutual passages of the guest molecules in the chains of pore segments, thus quantifying departure from a genuine single-file system.

Original languageEnglish
Article number065901
JournalPhysical Review Letters
Volume102
Issue number6
DOIs
Publication statusPublished - Feb 11 2009

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diffusivity
profiles
butanes
files
ethane
alkanes
mass transfer
tracers
molecules
microscopy
porosity
interference
estimates
metals

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Heinke, L., Tzoulaki, D., Chmelik, C., Hibbe, F., Van Baten, J. M., Lim, H., ... Kärger, J. (2009). Assessing guest diffusivities in porous hosts from transient concentration profiles. Physical Review Letters, 102(6), [065901]. https://doi.org/10.1103/PhysRevLett.102.065901

Assessing guest diffusivities in porous hosts from transient concentration profiles. / Heinke, Lars; Tzoulaki, Despina; Chmelik, Christian; Hibbe, Florian; Van Baten, Jasper M.; Lim, Hyuna; Li, Jing; Krishna, Rajamani; Kärger, Jörg.

In: Physical Review Letters, Vol. 102, No. 6, 065901, 11.02.2009.

Research output: Contribution to journalArticle

Heinke, L, Tzoulaki, D, Chmelik, C, Hibbe, F, Van Baten, JM, Lim, H, Li, J, Krishna, R & Kärger, J 2009, 'Assessing guest diffusivities in porous hosts from transient concentration profiles', Physical Review Letters, vol. 102, no. 6, 065901. https://doi.org/10.1103/PhysRevLett.102.065901
Heinke, Lars ; Tzoulaki, Despina ; Chmelik, Christian ; Hibbe, Florian ; Van Baten, Jasper M. ; Lim, Hyuna ; Li, Jing ; Krishna, Rajamani ; Kärger, Jörg. / Assessing guest diffusivities in porous hosts from transient concentration profiles. In: Physical Review Letters. 2009 ; Vol. 102, No. 6.
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