Design and Synthesis of New Porphyrin based Covalent Organic Frameworks (COFs) for the Enhancement of its Stability and Crystallinity

Abstract

Covalent organic frameworks (COFs) represent an exciting new type of porous organic materials, which are ingeniously constructed with organic building units via strong covalent bonds. The well-defined crystalline porous structures together with tailored functionalities have offered the COF materials superior potential in diverse applications, such as gas storage, adsorption, optoelectricity, and catalysis. In this report, introduction of intermolecular O-H…N=C hydrogen bonding as an extra stabilizing factor, which helps to improve the crystallinity, and porosity of the porphyrin containing covalent organic frameworks (COFs) has been demonstrated. An improvement in the chemical stability of COFs in aqueous and acidic medium as a result of intermolecular hydrogen bonding is obtained.