Large-scale synthesis of azine-linked covalent organic frameworks in water and promoted by water

Abstract

A hydrothermal procedure has been developed to produce azine-linked COFs by conducting condensation reactions of hydrazine with hydroxy-substituted 1,3,5-triformylbenzene in water. The synthesis of one representative COF was drastically promoted by water in comparison with the traditional solvothermal reactions in organic solvents. This synthesis has advantages of large-scale production, catalyst-free reaction, short reaction time, and the obtained COF exhibits higher crystallinity and surface area.