Twisted pore aperture of MOF induced three-dimensional restricted sieving separation for CO2 and C2H2 mixtures

It is highly desired but considered impractical for the two-dimensional restricted molecular-sieving separation of CO 2 /C 2 H 2 based on the cross-sectional area difference. Herein, the ideal molecular-sieving separation of CO 2 /C 2 H 2 was achieved by the proposed three-dimensional restricted sieving mechanism via the twisted pore aperture of ultramicroporous Cu-Trz MOF.