Cooperative Immobilization of Transition-Metal Clusters into Kagome-Type Metal–Organic Framework for C2H2/CO2 Separation

There has long been a pursuit for a metal–organic framework (MOF)-based adsorbent for various hydrocarbon separations. Herein, we utilized simple trimesic acid and 1,2,4-triazole, together with the heterometallic strategy to produce two quaternary MOFs with a kgm-type structure. The cooperative coordination allows the immobilization of metal clusters into the pore channels, creating an appropriate pore size and high density of open metal sites. The resulting material shows excellent C2H2/CO2 separation performance with good stability.