fig4

Figure 4. Gas absorption and desorption of PAF-1 and its derivations. (A) N₂ uptake at 77 K; (B) CO₂ uptake of PAF-1 and its derivations at 273 K; (C) CO₂ uptake of PAF-1 and its derivations at 298 K; (D) CO₂ Q_st of PAF-1 and PAF-1-NH₂. PAF-1: Porous aromatic framework-1.