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 language | English |
|---|---|
| Article number | 065901 |
| Journal | Physical Review Letters |
| Volume | 102 |
| Issue number | 6 |
| DOIs | |
| Publication status | Published - Feb 11 2009 |
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ASJC Scopus subject areas
- Physics and Astronomy(all)
Cite this
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 journal › Article
}
TY - JOUR
T1 - Assessing guest diffusivities in porous hosts from transient concentration profiles
AU - Heinke, Lars
AU - Tzoulaki, Despina
AU - Chmelik, Christian
AU - Hibbe, Florian
AU - Van Baten, Jasper M.
AU - Lim, Hyuna
AU - Li, Jing
AU - Krishna, Rajamani
AU - Kärger, Jörg
PY - 2009/2/11
Y1 - 2009/2/11
N2 - 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.
AB - 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.
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U2 - 10.1103/PhysRevLett.102.065901
DO - 10.1103/PhysRevLett.102.065901
M3 - Article
VL - 102
JO - Physical Review Letters
JF - Physical Review Letters
SN - 0031-9007
IS - 6
M1 - 065901
ER -