All gas adsorption isotherms, apart from Fig. , for CO 2 and N 2 were taken on an Anton Parr Autosorb iQ-XR analyser. Samples were activated on the attached vacuum degassing stations (KHCO 3 CD-MOF room temperature = 303 or 308 K, 24 h). N 2 isotherms were obtained at 77 K (liquid N 2 bath), and CO 2 isotherms were taken at either 298 K or 303 K (water bath). All analysis was performed in AsiQwin 5.21 software, where multipoint BET was applied to N 2 isotherms for surface area determination.