Single-component O2, N2, and Ar adsorption (filled circles) and desorption (open circles) isotherm data collected at 298 K for Cu2.7-MFU-4l. Colored lines represent calculated curves obtained from simultaneous fitting of three single-component isotherms at different temperatures with either a dual-site Langmuir–Freundlich equation (N2, O2: 288, 298, and 308 K) or a single Langmuir–Freundlich equation (Ar: 170, 180, and 190 K).
