Heinke, Lars ; Tzoulaki, Despina ; Chmelik, Christian ; Hibbe, Florian ; van Baten, Jasper M. ; Lim, Hyuna ; Li, Jing ; Krishna, Rajamani ; Kärger, Jörg (2009) Assessing guest diffusivities in porous hosts from transient concentration profiles Physical Review Letters, 102 (6). 065901_1-065901_4. ISSN 0031-9007
Full text not available from this repository.
Official URL: http://prl.aps.org/abstract/PRL/v102/i6/e065901
Related URL: http://dx.doi.org/10.1103/PhysRevLett.102.065901
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.
Item Type: | Article |
---|---|
Source: | Copyright of this article belongs to The American Physical Society. |
ID Code: | 93764 |
Deposited On: | 25 Jun 2012 13:11 |
Last Modified: | 25 Jun 2012 13:11 |
Repository Staff Only: item control page