Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 60, Issue 14, Pages 7547-7552Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202013988
Keywords
C2H2 uptake; C2H2; CO2 separation; hybrid ultra-microporous materials; metal– organic frameworks (MOFs); selective adsorption
Categories
Funding
- Strategic Priority Research Program of the Chinese Academy of Sciences [XDB20000000]
- National Nature Science Foundation of China [21871266, 21731006]
- Natural Science Foundation of Fujian Province [2020J06034]
- Key Research Program of Frontier Science CAS [QYZDY-SSW-SLH025]
- Youth Innovation Promotion Association CAS
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The newly synthesized SIFSIX-Cu-TPA exhibits high BET surface area and C2H2 uptake, as well as excellent C2H2/CO2 separation performance.
Despite much intense investigation on the C2H2/CO2 separation, the trade-off between the adsorption capacity and separation selectivity is still tricky. To overcome the dilemma, we have rationally synthesized an ultra-stable fluorinated hybrid porous material SIFSIX-Cu-TPA with the ith-d topology. Completely differing from the famous pillar-layer fluorinated materials, SIFSIX-Cu-TPA possesses a unique pillar-cage structure, in which the SiF62- anions cross-link two adjacent metal nodes as pillars to stabilize the three-dimensional framework constructed by icosahedral and tetrahedral cages. As anticipated, SIFSIX-Cu-TPA has high BET surface area (1330 m(2) g(-1)) as well as high C2H2 uptake (185 cm(3) g(-1) at 298 K and 1 bar). At the same time, due to the obvious difference in the adsorption performance of CO2 and C2H2 especially in the low pressure area, SIFSIX-Cu-TPA also exhibits an excellent C2H2/CO2 separation performance (breakthrough time up to 68 min g(-1) at 298 K and 1 bar).
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