Journal
CHEMISTRY-A EUROPEAN JOURNAL
Volume 22, Issue 33, Pages 11816-11825Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.201601784
Keywords
coordination chemistry; gas adsorption; gate-opening; hydrocarbon adsorption; metal-organic frameworks
Categories
Funding
- US Department of Energy (DOE) [DE-FG02-08ER46491]
- Micromeritics Instrument Corp.
- US DOE, office of Basic Energy Sciences (BES) [BES DE-FG02-09ER46650]
Ask authors/readers for more resources
Gate-opening is a unique and interesting phenomenon commonly observed in flexible porous frameworks, where the pore characteristics and/or crystal structures change in response to external stimuli such as adding or removing guest molecules. For gate-opening that is induced by gas adsorption, the pore-opening pressure often varies for different adsorbate molecules and, thus, can be applied to selectively separate a gas mixture. The detailed understanding of this phenomenon is of fundamental importance to the design of industrially applicable gas-selective sorbents, which remains under investigated due to the lack of direct structural evidence for such systems. We report a mechanistic study of gas-induced gate-opening process of a microporous metal-organic framework, [Mn(ina)(2)] (ina=isonicotinate) associated with commensurate adsorption, by a combination of several analytical techniques including single crystal X-ray diffraction, in situ powder X-ray diffraction coupled with differential scanning calorimetry (XRDDSC), and gas adsorption-desorption methods. Our study reveals that the pronounced and reversible gate opening/closing phenomena observed in [Mn(ina)(2)] are coupled with a structural transition that involves rotation of the organic linker molecules as a result of interaction of the framework with adsorbed gas molecules including carbon dioxide and propane. The onset pressure to open the gate correlates with the extent of such interaction.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available