The efficient separation of acetylene (CH) and ethylene (CH) is an important and complex process in the industry. Herein, we report a new family of -topologic coordination frameworks (termed to ) with CuMF (M = Si, Ti, and Zr) nodes. These charged frameworks are compensated by different counterbalanced ions (MF, BF, and Cl), yielding changes in the size of the window apertures. Among these frameworks, (activated ) shows good adsorption selectivity of CH/CH and also significant ability in recovering both highly pure CH (99.95%) and CH (99.98%). Our work not only presents a potential alternative for energy-saving purification of C2 hydrocarbons but also provides a new approach for tuning the function of charged porous materials.
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