Figure 1: Design and synthesis of the Nx–COFs.
From: A tunable azine covalent organic framework platform for visible light-induced hydrogen generation
(a) A tunable triphenylarene platform for photocatalytic hydrogen evolution. Replacement of ‘C–H’ by ‘nitrogen atoms’ at the green dots changes the angle between central aryl and peripheral phenyl rings, which leads to varied planarity in the platform. (b) Synthesis of Nx–COFs from Nx–aldehydes and hydrazine.
