To elucidate this controllable mechanics, we computed the potential energy profiles for the gis-ZIF series by varying the rotating angle θ (Figure , S20). The simulated energy curves distinctively exhibit the difference between gis-ZIF-1 and gis-ZIF-2. The shallow curve observed for gis-ZIF-1 signifies the ease of rotational mechanics, whereas the steep curve of gis-ZIF-2 shows the hindrance in the mechanics.