An ato-topology metal–organic framework with large C2H2 adsorption and C2H2/CO2 separation capacity

Abstract

The efficient separation of C₂H₂/CO₂ is challenging and energy intensive due to their similar molecular shapes and kinetic diameters. Here we report an ato-topology metal–organic framework (JNU-7a) with a specific surface area of 2046 cm² g⁻¹ and open-metal-site density of 2.05 mmol cm⁻³, resulting in a large C₂H₂ adsorption capacity of (176 cm³ g⁻¹) and high C₂H₂/CO₂ adsorption selectivity (6.2).