期刊
CHEMISTRY-A EUROPEAN JOURNAL
卷 21, 期 19, 页码 7238-7244出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.201406495
关键词
adsorption; carbon dioxide; metal-organic frameworks; pillared-layer; X-ray diffraction
资金
- NSFC of China [21471027, 21171033, 21131001, 21222105]
- National Key Basic Research Program of China [2013CB834802]
- Foundation for Author of National Excellent Doctoral Dissertation of China (FANEDD) [201022]
- Jilin Province
- NENU
Two pillared-layer metal-organic frameworks (MOFs; PMOF-55 and NH2-PMOF-55) based on 1,2,4-triazole and terephthalic acid (bdc)/NH2-bdc ligands were assembled and display framework stabilities, to a certain degree, in both acid/alkaline solutions and toward water. They exhibit high CO2 uptakes and selective CO2/N-2 adsorption capacities, with CO2/N-2 selectivity in the range of 24-27, as calculated by the ideal adsorbed solution theory method. More remarkably, the site and interactions between the host network and the CO2 molecules were investigated by single-crystal X-ray diffraction, which showed that the main interaction between the CO2 molecules and PMOF-55 is due to multipoint supramolecular interactions of CHO, CO, and OO. Amino functional groups were shown to enhance the CO2 adsorption and identified as strong adsorption sites for CO2 by X-ray crystallography.
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