fig2

Figure 2. (A) The structure of PAF-1; (B-D) Synthesis schemes for PAF-1 with different functional groups. (A) Adapted with permission^[73]. Copyright 2019, John Wiley and Sons. (B) Adapted with permission^[76]. Copyright 2019, American Chemical Society. (C) Adapted with permission^[77]. Copyright 2020, American Chemical Society. (D) Adapted with permission^[78]. Copyright 2017, American Chemical Society. PAF: Porous aromatic framework.