Coordination Polymer Glasses with Lava and Healing Ability for High‐Performance Gas Sieving

Abstract Coordination polymer (CP) glasses offer a way to tackle the fabrication challenges encountered by inorganic porous membranes and show great potentials for size‐exclusive gas separation. However, their processability and performance still cannot simultaneously meet the requirements for high‐performance membrane separation. Herein, we have developed a series of CP glasses (M‐P‐dmbIm, M=Zn, Cd, Cu, and Mn), which possess low vitrification temperature as well as low viscosity (η) and lave capability above the transition temperatures. The derived glass (a g M‐P‐dmbIm) membranes show outstanding performances for H 2 /CO 2 , H 2 /N 2 , and H 2 /CH 4 separation, which all far surpass the Robeson upper bound and even rival against the best of the state‐of‐the‐art gas separation membranes. The low viscosities not only allow us to hot‐cast or hot‐press the CP glasses into thin membranes within 5 min without sacrificing their selectivity and permeability, but also endow the resulted glass membranes with healing ability.