Direct Synthesis of a Covalent Triazine‐Based Framework from Aromatic Amides

Abstract There have been extensive efforts to synthesize crystalline covalent triazine‐based frameworks (CTFs) for practical applications and to realize their potential. The phosphorus pentoxide (P 2 O 5 )‐catalyzed direct condensation of aromatic amide instead of aromatic nitrile to form triazine rings. P 2 O 5 ‐catalyzed condensation was applied on terephthalamide to construct a covalent triazine‐based framework ( p CTF‐1). This approach yielded highly crystalline p CTF‐1 with high specific surface area (2034.1 m 2 g −1 ). At low pressure, the p CTF‐1 showed high CO 2 (21.9 wt % at 273 K) and H 2 (1.75 wt % at 77 K) uptake capacities. The direct formation of a triazine‐based COF was also confirmed by model reactions, with the P 2 O 5 ‐catalyzed condensation reaction of both benzamide and benzonitrile to form 1,3,5‐triphenyl‐2,4,6‐triazine in high yield.