Novel modified magnetic graphene oxide as an efficient and green catalyst for one-pot synthesis of pyrazoles.

The primary aim of this investigation is to fabricate a novel nano-catalyst by anchoring copper iodide onto magnetized graphene oxide and modifying it with a new ligand of N',N'-bis(2-aminobenzoyl)benzene-1,3-disulfonohydrazide (ABDSH). The performance of this nano-catalyst demonstrated remarkable efficacy and selectivity. The synthesized nanocomposite was characterized using FTIR, EDX, MAPPING, FESEM, VSM, TGA, and DSC techniques. Results indicated that this nanocomposite possessed favorable morphology, facile preparation, high catalytic activity, and substantial surface area. Furthermore, the GO@FeO@PTMS@ABDSH@CuI nanocomposite was employed as a recyclable heterogeneous catalyst for green synthesis of pyrazole derivatives. Noteworthy advantages of this reaction encompass its solvent-free conditions, straightforward purification process, cost-effectiveness, attainment of high product yields, synthesis of new pyrazole derivatives, minimal reaction durations, and simple operational procedures. Moreover, the proposed GO@FeO@PTMS@ABDSH@CuI heterogeneous catalyst demonstrated excellent stability and reusability over four consecutive cycles, aligning with the principles of green chemistry.