Molecular Sieving of C2-C3 Alkene from Alkyne with Tuned Threshold Pressure in Robust Layered Metal-Organic Frameworks
Molecular Sieving of C2-C3 Alkene from Alkyne with Tuned Threshold Pressure in Robust Layered Metal-Organic Frameworks
复制标题
在稳健的层状金属有机框架中通过调节阈值压力从炔烃中进行 C2-C3 烯烃的分子筛分
DOI：
10.1002/anie.202003421
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发表时间：
2020-05-28
影响因子：
16.6
通讯作者：
Ren, Qilong
中科院分区：
文献类型：
--
作者：
Ke, Tian;Wang, Qingju;Ren, Qilong
C-2-C-3 alkyne/alkene separation is of great importance; however, designing materials for an efficient molecular sieving of alkenes from alkynes remains challenging. Now, two hydrolytically stable layered MOFs, [Cu(dps)(2)(GeF6)] (GeFSIX-dps-Cu, dps=4,4 '-dipyridylsulfide) and [Zn(dps)(2)(GeF6)] (GeFSIX-dps-Zn), can achieve almost complete exclusion of both C3H6 and C2H4 from their alkyne analogues. GeFSIX-dps-Cu displays a notable advanced threshold pressure for alkynes adsorption and thus substantial uptakes at lower pressures, providing record C3H4/C3H6 uptake ratios and capacity-enhanced C2H2/C2H4 sieving for a wide composition range. Metal substitution (Zn to Cu) affords fine tuning of linker rotation and layer stacking, creating slightly expanded pore aperture and interlayer space coupled with multiple hydrogen-bonding sites, allowing easier entrance of alkyne while excluding alkene. Breakthrough experiments confirmed tunable sieving by these MOFs for C3H4/C3H6 and C2H2/C2H4 mixtures.
