Synthesis of Ag–Cu–Ni Nanoparticles Stabilized on Functionalized g–C(3)N(4) and Investigation of Its Catalytic Activity in the A(3)-Coupling Reaction

[Image: see text] In the present research, using ethylenediamine and hydrazine hydrate as the capping and reducing agents in this investigation, respectively, Ag–Cu–Ni NPs were immobilized on the functionalized g–C(3)N(4) surface. This nanocatalyst was studied in terms of its catalytic activities for the A(3)-coupling reaction to synthesize propargylamine derivatives. According to the results, in the presence of 1 mL of toluene as the solvent and 20 mg of the g–C(3)N(4)–TCT–2AEDSEA–Ag–Cu–Ni nanocatalyst, the maximum efficiency of the nanocatalyst occurred at a temperature of 80 °C. Products were purified using thin-layer chromatography plates (silica gel) by employing n-hexane/ethyl acetate with a 90:10 ratio. In addition, the prominent benefits of the synthesized nanocatalyst include its high yields of the product, cost-effectiveness, recyclability, and easy separation. The novelty of the catalyst is due to the presence of Ag–Cu–Ni nanoparticles at the same time in the structure of the functionalized g–C(3)N(4) substrate. So, Ag–Cu–Ni can be strongly connected to the substrate. The structure of the synthesized nanocatalyst was characterized using Fourier transformed infrared spectroscopy, X-ray powder diffraction, field emission scanning electron microscopy, energy-dispersive X-ray spectroscopy, vibrating-sample magnetometry, and transmission electron microscopy.