Suzuki-Miyaura Cross-coupling Reaction Catalyzed by Nickel Nanoparticles Supported on Poly(N-vinyl-2-pyrrolidone)/TiO₂-ZrO₂Composite

Abstract

Nickel nanoparticle-poly(N-vinyl-2-pyrrolidone)/TiO 2 -ZrO 2 composite (Ni-PVP/TiO 2 -ZrO 2 ) was prepared by in situ polymerization method. The physical and chemical properties of Ni-PVP/TiO 2 -ZrO 2 were investigated by XRD, FT-IR, BET, TGA, SEM and TEM techniques. The catalytic performance of this novel heterogeneous catalyst was determined for the Suzuki-Miyaura cross-coupling reaction between aryl halides and phenylboronic acid in the presence of methanol-water mixture as solvent. The effects of reaction temperature, the amount of catalyst, amount of support, solvent, and amount of metal for the synthesis of Ni-PVP/TiO 2 -ZrO 2 , were investigated as well as recyclability of the heterogeneous composite. The catalyst used for this synthetically useful transformation showed considerable level of reusability besides very good activity.

Nickel-metalated porous organic polymer for Suzuki–Miyaura cross-coupling reaction

“…Compared to the reported Ni-loaded solid catalytic systems (Table 4), which usually contained coexistent such as PPh 3 or other metal oxides, for the Suzuki-Miyaura coupling reaction, it exhibited an impressive catalytic performance. On the other hand, we believe the Ni-catalysed Suzuki-Miyaura crosscoupling reaction herein went through the same mechanism as the reported one, [33][34][35] which should involve the initial oxidative addition of the aryl halide to a Ni(0) species, followed by trans-metalation and subsequent reductive elimination step to afford the expected coupling product, meanwhile the catalytically active nickel(0) species was regenerated (Fig. S8, ESI †).…”

Efficient Oxidation of Cyclohexane over Bulk Nickel Oxide under Mild Conditions

“…Powder XRD analysis was used to identify the synthesized NiO powder ( Figure 5 ). The XRD pattern shows the principal peaks of NiO, which were observed at 2Ɵ = 37.31°, 43.41°, 62.87°, 75.53°, and 79.46° and assigned to the (111), (200), (220), (311), and (222) planes, respectively [ 45 ]. This confirmed the formation of pure NiO particles [ 46 , 47 ].…”

REDUCTION OF p-NITROPHENOL TO p-AMINOPHENOL BY USING NiO CATALYSTS: A COMPARATIVE STUDY

“…4 Recently, transition metal oxides as catalysts are to tailor and design according to their sizes, structure in nanodimensions and therefore their surface chemistry and catalytic properties. [5][6][7][8][9] An increasing number of illustrations are accessible in the literature where nickel-based nanoparticles have been used as catalysts during organic transformations. 10,11 Nickel oxide (NiO) is a p-type semiconductor material with magnetic power and wide band-gap energy (3.6-4.0 eV).…”