Fig. 3
Stability test and porosity characterization of compounds 1 and 2. a Powder X-ray diffraction patterns of compound 1. From bottom to top: simulated (black), as synthesized (red), after adsorption experiments (blue), heated at 180 °C in open air for 1 month (purple, relative humidity: ~30–50% RH), and boiled in water for 1 week (green). b Powder X-ray diffraction patterns of compound 2. From bottom to top: simulated (black), as synthesized (red), boiled in water for 3 days (blue), and heated at 180 °C in open air for 1 week (purple). c N2 adsorption isotherms at 77 K for compound 1 (as synthesized: black, after being heated at 80 °C in water for 1 day: red) and compound 2 (as synthesized: blue, after being heated at 80 °C in water for 1 day: green)
