Fig. 4: Gas adsorption properties and binding sites.

a Single-component CO2, Xe, Kr, N2, and O2 adsorption isotherms at 298 K for SIFSIX-3-Cu. Molecular illustration of the most favorable binding site for b Xe and c Kr in SIFSIX-3-Cu (top view) as determined from simulated annealing calculations. Atom colors: C = cyan, H = white, N = blue, F = green, Si = yellow, Cu = gold, Xe = violet, Kr = pink.