Figure 1

The hierarchy diagram showing the different structures and the gas storage behaviours of the pmg-MOF-5 and the pristine MOF-5.
a, The pristine MOF-5 takes in gas molecules only in its micropores. b,. The pmg-MOF-5 gives high capacities and fast kinetics using the large pores composed of meso/macropores enclosed by micropores as the pressure of gas molecule is increased, where the filled circles in light ocher and red colors represent schematically gas molecules.