Fig. 6. Upper: O2 adsorption data for 1 at 233, 273, and 298 K (blue to red gradient). Circles represent data, and solid lines correspond to fits using a dual-site Langmuir–Freundlich model. Lower: O2 differential enthalpy of adsorption curve for 1, plotted as a function of O2 adsorbed. Green circles represent data, and error bars are shown in black.
