Temperature-regulated guest admission and release in microporous materials
- Univ. of Western Australia, Crawley, WA (Australia). Centre for Energy; The University of Western Australia
- City Univ. of Hong Kong (China). School of Energy and Environmental Catalysis; Univ. of Melbourne (Australia). Dept. of Chemical and Biomolecular Engineering
- Australian Nuclear Science and Technology Organisation (ANSTO), Clayton, VIC (Australia). Australian Synchrotron
- Georgia Inst. of Technology, Atlanta, GA (United States). School of Chemical and Biomolecular Engineering
- Univ. of Western Australia, Crawley, WA (Australia). Centre for Energy
- Univ. of Melbourne (Australia). Dept. of Chemical and Biomolecular Engineering
- Monash Univ., Melbourne, VIC (Australia). Dept. of Mechanical and Aerospace Engineering
While it has long been known that some highly adsorbing microporous materials suddenly become inaccessible to guest molecules below certain temperatures, previous attempts to explain this phenomenon have failed. Here we show that this anomalous sorption behaviour is a temperature-regulated guest admission process, where the pore-keeping group’s thermal fluctuations are influenced by interactions with guest molecules. A physical model is presented to explain the atomic-level chemistry and structure of these thermally regulated micropores, which is crucial to systematic engineering of new functional materials such as tunable molecular sieves, gated membranes and controlled-release nanocontainers. The model was validated experimentally with H2, N2, Ar and CH4 on three classes of microporous materials: trapdoor zeolites, supramolecular host calixarenes and metal-organic frameworks. We also demonstrate how temperature can be exploited to achieve appreciable hydrogen and methane storage in such materials without sustained pressure. Our findings also open new avenues for gas sensing and isotope separation.
- Research Organization:
- Energy Frontier Research Centers (EFRC) (United States). Center for Understanding and Control of Acid Gas-induced Evolution of Materials for Energy (UNCAGE-ME); Georgia Tech Research Corporation, Atlanta, GA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
- Grant/Contract Number:
- SC0012577
- OSTI ID:
- 1374884
- Journal Information:
- Nature Communications, Journal Name: Nature Communications Vol. 8; ISSN 2041-1723
- Publisher:
- Nature Publishing GroupCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Similar Records
Guests inducing p-sulfonatocalix[4]arenes into nanocapsule and layer structure
Understanding and controlling water-organic co-transport in amorphous microporous materials
Reversible sorption in the crystalline microporous semiconductor Rb-CTH-1
Journal Article
·
Tue Jun 15 00:00:00 EDT 2010
· Journal of Solid State Chemistry
·
OSTI ID:21457148
Understanding and controlling water-organic co-transport in amorphous microporous materials
Technical Report
·
Sun Dec 08 23:00:00 EST 2024
·
OSTI ID:2480327
Reversible sorption in the crystalline microporous semiconductor Rb-CTH-1
Journal Article
·
Wed Sep 15 00:00:00 EDT 2010
· Journal of Solid State Chemistry
·
OSTI ID:21432459