Hopping Diffusion in Wiggling Nanopore Architecture of MOF Enabling Synergistic Equilibrium‐Kinetic Separation of Fluorinated Propylene and Propane

The separation of octafluoropropane (C3F8) from hexafluoropropylene (C3F6) is an industrially important yet challenging process due to their similar physicochemical properties and and stringent purity demands in industrial applications. Herein, we address this task through precise pore architecture in a zirconium‐based metal‐organic framework (Zr‐PMA), which exhibits a unique ‘wiggling nanopores’ with narrow windows and large cavities. The narrow windows act as diffusion barriers, selectively restricting C3F8 transport, while the large cavities provide strong adsorption sites for C3F6, enabling an equilibrium‐kinetic synergistic separation. This dual functionality results in a ~450‐fold difference in diffusion rates and exceptional kinetic selectivity for C3F6 over C3F8, as demonstrated by adsorption isotherms, time‐resolved kinetics, and dynamic breakthrough experiments. Theoretical calculations coupled with in situ spectroscopy elucidate the pore geometry‐dependent hopping diffusion mechanism responsible for the separation. This work establishes wiggling pore geometry as a versatile paradigm for advanced adsorbents targeting energy‐efficient separations ofstructurally similar fluorocarbon mixtures.