Cover Picture: Cyclotetrabenzoin Acetate: A Macrocyclic Porous Molecular Crystal for CO2 Separations by Pressure Swing Adsorption (Angew. Chem. Int. Ed. 27/2021)

Abstract A porous molecular crystal assembled by close-packing of macrocyclic cyclotetrabenzoin acetate efficiently captures CO2, as reported by Ognjen Š. Miljanić, Teng-Hao Chen et al. in their Research Article on page 14931. The square 7.1×7.1 Å pores enable excellent CO2/N2 and CO2/CH4 separation performance via both kinetic and thermodynamic effects. Moderately strong CO2–framework interactions allow easy regeneration of the adsorbent and its use in pressure swing adsorption.