). As a reference, we also collected the isotherms for ZnCl-MFU-4l, for which H2 uptake originates only from weak physisorption at non-Cu adsorption sites. For facile comparison, the obtained excess gravimetric H2 uptake data were converted to the excess volumetric uptake by employing the crystallographic density of each activated framework (Table ). All MFU-4l frameworks exhibit a gradual increase in H2 uptake upon dosing H2 up to 190 bar, with no hysteresis upon desorption at the examined temperatures (Figures ).