Fig. 3: Gas adsorption properties of Zn-fa-datz (1) and Zn-fa-atz (2).

a CO2 adsorption isotherms at 195 K (solid: adsorption; open: desorption) and corresponding pore size distributions calculated based on the CO2 isotherm at 195 K according to the Horvath-Kawazoe model (pore geometry: cylinder) (insert) for Zn-fa-datz (1) (red) and Zn-fa-atz (2) (black). b Adsorption isotherms of Zn-fa-atz (2) for CO2 (black), C2H2 (red), C2H4 (blue) and C2H6 (purple) from 0–100 kPa and 298 K. c Comparison of CO2 (point) and C2H4 (star) adsorption isotherms of Zn-fa-datz (1) (red) and Zn-fa-atz (2) (black) from 0 to 35 kPa and 298 K. d Comparison of adsorption enthalpies (Qst) of four gases in Zn-fa-datz (1) and Zn-fa-atz (2).