Extended Data Fig. 4: Solid-state isotherms.
O2 adsorption isotherms at 25 °C (a,b) and 37 °C (c,d) in the solid state are plotted on a gravimetric and volumetric basis. Volumetric values are calculated from gravimetric values using the crystallographic density. Consistent with the accessible surface area, covalent functionalization of ZIF-8 has a negligible impact on adsorption of O2, as demonstrated by comparing the isotherms for ZIF-8 and (mPEG)ZIF-8.
