期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 59, 期 46, 页码 20561-20567出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202008132
关键词
adsorption; alkanes; alkenes; mesoporous materials; metal-organic frameworks
资金
- Russian Foundation for Basic Research [18-29-04001]
- Russian Science Foundation [19-73-20087]
- Russian Science Foundation [19-73-20087] Funding Source: Russian Science Foundation
The NIIC-20 (NIIC stands for Nikolaev Institute of Inorganic Chemistry) is a family of five isostructural metal-organic frameworks (MOFs) based on dodecanuclear wheel-shaped carboxylate building blocks {Zn-12(RCOO)(12)(glycol)(6)} (glycol is deprotonated diatomic alcohol: ethylene glycol, 1,2-propanediol, 1,2-butanediol, 1,2-pentanediol or glycerol), quantitatively crystallized from readily available starting chemicals. The crystal structures contain large mesoporous cages of 25 angstrom connected through {Zn-12} rings, of which inner diameter and chemical nature depend solely on the chosen glycol. The NIIC-20 compounds feature high surface area and rarely observed inversed adsorption affinity for saturated hydrocarbon (ethane) over the unsaturated ones (ethylene, acetylene). The corresponding IAST (Ideal Adsorbed Solution Theory) adsorption selectivity factors reach as much as 15.4 for C2H6/C(2)H(4)and 10.9 for C2H6/C(2)H(2)gas mixtures at ambient conditions, exceeding those for any other porous MOF reported so far. The remarkable combination of high adsorption uptakes and high adsorption selectivities makes the NIIC-20 series a new benchmark of porous materials designed for ethylene separation applications.
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