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In this research, the functionalized graphene oxide (GO) catalyst was prepared by covalently immobilization of metformin copper complex on the surface of GO. The chemical and physical structures of catalyst were fully characterized by various analyses like XRD, ICP, FT-IR, TEM, EDX, BET and TGA. Then, the effects of nanosheet heterogeneous catalyst were investigated for the synthesis of 1,2,3-triazoles  via  azide-alkyne cycloaddition reaction. This is the first report for the synthesis of 1,2,3-triazoles derivatives catalyzed by heterogeneous GO copper complex and water as a green solvent. HighlightsFirst preparation and characterization of GO functionalized Copper Complex.Covalently and chemically immobilization of Cu(II) complex on the surface of GO.Synthesis of 1,2,3-triazoles via click reaction in water and room temperature.Reusable catalyst for at least for five times without any decreasing in catalytic activity. First preparation and characterization of GO functionalized Copper Complex. Covalently and chemically immobilization of Cu(II) complex on the surface of GO. Synthesis of 1,2,3-triazoles via click reaction in water and room temperature. Reusable catalyst for at least for five times without any decreasing in catalytic activity.

Synthesis, Characterization and First Application of Graphene Oxide Functionalized Cu(II) Complex for the Synthesis of 1,2,3-Triazole Derivatives