An Unprecedented Pillar‐Cage Fluorinated Hybrid Porous Framework with Highly Efficient Acetylene Storage and Separation. Issue 14 (25th February 2021)

• Record Type: Journal Article
• Authors: Li, Hao; Liu, Caiping; Chen, Cheng; Di, Zhengyi; Yuan, Daqiang; Pang, Jiandong; Wei, Wei; Wu, Mingyan; Hong, Maochun
• Is Part Of: Angewandte Chemie international edition. Volume 60:Issue 14(2021)
• Page Start: 7547
• Page End: 7552
• Publication Date: 2021-02-25
• Subjects: C2H2 uptake -- C2H2/CO2 separation -- hybrid ultra-microporous materials -- metal–organic frameworks (MOFs) -- selective adsorption; Chemistry -- Periodicals; 540
• DOI: 10.1002/anie.202013988
• Languages: English
• ISSNs: 1433-7851

Abstract

Abstract: Despite much intense investigation on the C2 H2 /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 SiF6 2− 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 C2 H2 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 C2 H2 especially in the low pressure area, SIFSIX‐Cu‐TPA also exhibits an excellent C2 H2 /CO2 separation performance (breakthrough time up to 68 min g −1 at 298 K and 1 bar). Abstract : An ultra‐stable fluorinated hybrid porous material with ith‐d topology possesses a unique pillar‐cage structure, which results in a high C2 H2 uptake as well as an excellent C2 H2 /CO2 separation performance simultaneously.