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Pore Space Partition within a Metal-Organic Framework for Highly Efficient C2H2/CO2 Separation



Yingxiang Ye, Zhenlin Ma, Rui-Biao Lin, Rajamani Krishna, Wei Zhou, Quanjie Lin, Zhangjing Zhang, Shengchang Xiang, Banglin Chen


The pore space partition (PSP) approach has been employed to realize a novel porous MOF (FJU-90) with dual functionalities for the challenging C2H2/CO2 separation under ambient conditions. By virtue of a triangular ligand (Tripp = 2,4,6-tris-(4-pyridyl)pyridine), the cylindrical channels in the original FJU-88 have been partitioned into uniformly interconnected pore cavities, leading to the dramatically reduced pore apertures from 12.0 x 0.4 angstrom}2 to 5.4 x 5.1 angstrom}2. Narrowing down the pore sizes, the resulting activated FJU-90a takes up a very high amount of C2H2 of 180 cm3g-1 but much less of CO2 of 103 cm3 g-1 at 298 K and 1 bar, demonstrating it as the best porous MOF material for this C2H2/CO2 (50%:50%) separation in terms of the C2H2 gravimetric productivity, IAST calculations, molecular modeling studies, simulated and experimental breakthrough experiments comprehensively demonstrate that the pore space partition strategy is a very powerful approach to construct MOFs with dual functionalities for the challenging gas separation.
Journal of American Chemical Society


Porous materials, Gas separation


Ye, Y. , Ma, Z. , Lin, R. , Krishna, R. , Zhou, W. , Lin, Q. , Zhang, Z. , Xiang, S. and Chen, B. (2019), Pore Space Partition within a Metal-Organic Framework for Highly Efficient C<sub>2</sub>H<sub>2</sub>/CO<sub>2</sub> Separation, Journal of American Chemical Society, [online], (Accessed April 14, 2024)
Created March 13, 2019, Updated October 12, 2021