Construction of a new 2D coral-like covalent organic framework as CuI nanoparticles carrier for the preparation of diverse triazoles

Abstract

In this work, a novel two-dimensional coral-like covalent organic framework (COF) with hydrazone linkages containing pyridine dicarbohydrazide moieties namely PDC-COF was designed and developed through a condensation reaction between the tri(4-formyl phenoxy) cyanurate (TFPC) and 2,6-dimethylpyridine-3,5-dicarbohydrazide (DMPDC) without applying inert atmosphere and using of any acidic catalyst. PDC-COF applied as carrier for CuI nanoparticles for construction of a robust heterogeneous catalyst (PDC-COF/CuI). This catalyst shows high thermal stability (up to 500 °C), good porosity (≃50 m2 g−1), acceptable crystalline structure with coral-like morphology. Accordingly, the obtained data revealed that the synthesized PDC-COF/CuI is highly active heterogeneous catalyst for the preparation of diverse triazoles by using different starting materials under green and mild reaction conditions. In addition, in comparison with the reported data in the literature, all of the prepared compounds have good yields (71–93%) and relatively short reaction times (45 min–15 h). Moreover, PDC-COF/CuI shows excellent stability and reusability (up to 6 times) without any significant decreases in its catalytic performance.