چكيده فارسي :
The Suzuki- Miyaura reaction has matured into a very powerful tool for the formation of new carbon – carbon bonds and is routinely used in fine chemicals research and pharmaceutical discovery laboratories.1-3 In this study, a palladium supported catalyst has been synthesized by covalently bonding of a novel cyclometalatedorganopalladium(II) complex containing N-aromatic ligand onto the graphene oxide (GO) surface through coordination interaction with 3-(aminomethyl)pyridine (3-ampy) ligand spacers. The [Pd(C^N)Cl(3-ampy)]/GO nanohybrid, which C^N =N(1), C(2′)-chelated deprotonated 2-phenylpyridine, was characterized using Fourier transform infrared spectroscopy (FT-IR), Raman spectroscopy, energy dispersive X-ray analysis (EDAX), X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), and transmission electron microscopy (TEM). The supported catalyst showed enhanced catalytic performance towards Suzuki–Miyaura carbon–carbon coupling reaction compared with the homogeneous analogue, and it could be readily recycled and reused several times without discernible loss of its activity. The [Pd(C^N)Cl(3-ampy)]/GO nanohybrid showed highly improved catalytic activity toward aryl chloride derivatives as compared with other catalysts that have been reported. As shown in Figure 1, the catalyst/K2CO3 system was effective for the coupling of various aryl halides with phenylboronic acid in solvent toluene at room temperature.
