fig3

Figure 3. Nitrogen adsorption and desorption isotherms at 77 K of (A) ADTB-COF and (B) ADPB-COF; Pore size distribution by NLDFT of ADTB-COF (C) and (D) ADPB-COF. ADTB: (4-amino-4"-(2,2-dioxan-1,3-dioxan-5-yl)-[1,1':3',1"-terphenyl]-5'-yl) boronic acid; COF: covalent organic framework; ADPB: (4'-amino-5'-(4-(2,2-dioxan-1,3-dioxan-5-yl)phenyl)-[1,1':3',1'-teroxan]-5-yl) boronic acid; NLDFT: nonlocal density functional theory.