Details
| Original language | English |
|---|---|
| Pages (from-to) | 15-26 |
| Number of pages | 12 |
| Journal | Microporous and Mesoporous Materials |
| Volume | 54 |
| Issue number | 1-2 |
| Early online date | 22 Mar 2002 |
| Publication status | Published - 1 Jul 2002 |
| Externally published | Yes |
Abstract
FAU membranes of type Na-X and MFI membranes of type silicalite-1 which contain adsorbed azobenzene (AZB), have photoswitchable permeation properties due to the trans-cis photoisomerization of AZB. The change of gas permeation through these host-guest composite membranes depends on the irradiation wavelength, the quality of the membranes and the amount of adsorbed AZB. The permeances of the gases in the trans-form of the zeolite-encapsulated AZB were higher than those in the cis-form. The separation factors of equimolar mixtures of N2/CO2 and CH4/CO2 fed through the FAU-AZB membrane were higher at trans-switching than at cis-switching. The changes of the permeances of single gases and of the separation factors of equimolar gas mixtures by photoinduced trans-cis switching were found to be reversible over numerous switching cycles. The experimental results are in agreement with predictions made by Monte Carlo simulations for passing of permeant gases through these host-guest systems with the zeolitehosted AZB in the trans- and in the cis-configuration.
Keywords
- Azobenzene, FAU, Host-guest interaction, MFI membrane, Monte Carlo simulation, Photoswitchable permeation
ASJC Scopus subject areas
- Chemistry(all)
- General Chemistry
- Materials Science(all)
- General Materials Science
- Physics and Astronomy(all)
- Condensed Matter Physics
- Engineering(all)
- Mechanics of Materials
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In: Microporous and Mesoporous Materials, Vol. 54, No. 1-2, 01.07.2002, p. 15-26.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Change of gas permeation by photoinduced switching of zeolite-azobenzene membranes of type MFI and FAU
AU - Weh, K.
AU - Noack, M.
AU - Hoffmann, K.
AU - Schröder, K. P.
AU - Caro, J.
PY - 2002/7/1
Y1 - 2002/7/1
N2 - FAU membranes of type Na-X and MFI membranes of type silicalite-1 which contain adsorbed azobenzene (AZB), have photoswitchable permeation properties due to the trans-cis photoisomerization of AZB. The change of gas permeation through these host-guest composite membranes depends on the irradiation wavelength, the quality of the membranes and the amount of adsorbed AZB. The permeances of the gases in the trans-form of the zeolite-encapsulated AZB were higher than those in the cis-form. The separation factors of equimolar mixtures of N2/CO2 and CH4/CO2 fed through the FAU-AZB membrane were higher at trans-switching than at cis-switching. The changes of the permeances of single gases and of the separation factors of equimolar gas mixtures by photoinduced trans-cis switching were found to be reversible over numerous switching cycles. The experimental results are in agreement with predictions made by Monte Carlo simulations for passing of permeant gases through these host-guest systems with the zeolitehosted AZB in the trans- and in the cis-configuration.
AB - FAU membranes of type Na-X and MFI membranes of type silicalite-1 which contain adsorbed azobenzene (AZB), have photoswitchable permeation properties due to the trans-cis photoisomerization of AZB. The change of gas permeation through these host-guest composite membranes depends on the irradiation wavelength, the quality of the membranes and the amount of adsorbed AZB. The permeances of the gases in the trans-form of the zeolite-encapsulated AZB were higher than those in the cis-form. The separation factors of equimolar mixtures of N2/CO2 and CH4/CO2 fed through the FAU-AZB membrane were higher at trans-switching than at cis-switching. The changes of the permeances of single gases and of the separation factors of equimolar gas mixtures by photoinduced trans-cis switching were found to be reversible over numerous switching cycles. The experimental results are in agreement with predictions made by Monte Carlo simulations for passing of permeant gases through these host-guest systems with the zeolitehosted AZB in the trans- and in the cis-configuration.
KW - Azobenzene
KW - FAU
KW - Host-guest interaction
KW - MFI membrane
KW - Monte Carlo simulation
KW - Photoswitchable permeation
UR - http://www.scopus.com/inward/record.url?scp=0036629082&partnerID=8YFLogxK
U2 - 10.1016/S1387-1811(02)00331-1
DO - 10.1016/S1387-1811(02)00331-1
M3 - Article
AN - SCOPUS:0036629082
VL - 54
SP - 15
EP - 26
JO - Microporous and Mesoporous Materials
JF - Microporous and Mesoporous Materials
SN - 1387-1811
IS - 1-2
ER -