Construction of imine–hydrazone dual linkage covalent organic frameworks

Abstract

The development of dual linkage covalent organic frameworks (DL-COFs) is fundamentally important for creating diversified structures and functions. Herein, imine–hydrazone DL-COFs were synthesized for the first time. Three novel imine–hydrazone DL-COFs have been constructed with bifunctional molecule 4-amino-2-methoxybenzohydrazide as the key building block via imine and hydrazone condensations simultaneously.