Scalable ambient pressure synthesis of covalent organic frameworks and their colorimetric nanocomposites through dynamic imine exchange reactions

Conquering the crystallinity conundrum: efforts to increase quality of covalent organic frameworks

“…12A) with different amines. 153 Highly crystalline COFs could be synthesized at 180 1C and ambient pressure in only 6 h. BET surface areas of 1052.3 m 2 g À1 (2-aminopyridin, Am4) and 1056.6 m 2 g À1 (n-propylamine, Am2) could be obtained, much higher than the 537 m 2 g À1 obtained by traditional solvothermal methods. Other modulators (n-butylamine, isobutylamine, n-hexylamine and dodecylamine) were also tested and all resulted in highly crystalline COFs.…”

Nitrogen-rich covalent organic frameworks: a promising class of sensory materials

“…Other amine and aldehyde-based modulators used for knitting prolonged 2D and 3D COF nets are propylamine, 2aminopyridine, benzaldehyde, 2,4,6-trimethylbenzaldehyde, etc. [178][179][180] A few months back, the mechanochemical synthetic approach for imine-linked COF synthesis was deeply studied to understand the mechanistic pathway. Four different COFs, viz.…”

Expeditious synthesis of covalent organic frameworks: a review

“…Likewise, Liu and co-workers developed a rapid and scalable synthesis of imine-linked 2D COFs through dynamic imine exchange reactions. 104 Unlike the conventional aldimine condensation, the formyl linker, Tp, was initially reacted with a truncated amine monomer (e.g., n-propylamine) to yield imines, which subsequently crosslinked with benzidine through an imine exchange reaction. Highly crystalline COFs were expeditiously produced in only 6 hours in a flask in lieu of the commonly used sealed vessels.…”