چكيده فارسي :
In organic synthesis, palladium is one of the most useful catalysts for various C-C bond formations such as Suzuki-Miyaura reaction. Despite the important role of Pd catalysts, the use of Pd have some disadvantages, including the catalyst reusability and high cost attributed to the scarcity of the metal, thus postponing their industrial applications]1[. Some researchers developed alloying strategy to overcome these problems and prepare heterogeneous Pd catalysts]2[. Immiscible liquid interface route is an effective and low cost strategy for rapid fabrication of large-area self-assembled nano films of various nanosized structures which has the extraordinary physical and chemical properties. To achieve this goal, various two immiscible liquids were used for a contact angle of 90° of the particles with the water/oil interface which is essential for the interfacial entrapment of nanostructures ]3[.
In this study, palladium bimetallic nanoalloy thin films were prepared by a simple reduction method at toluene/water interface and employed as catalyst in the Suzuki−Miyaura reaction. The morphology and structure of the prepared thin films were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM) and energy dispersive analysis of X-ray (EDAX). TEM analysis exhibits a sponge structure for PdFe/Fe2O3 bimetallic nanoalloy thin film, snowman like structure for PdPt and spherical structures for PdNi and PdCu thin films. The cross-coupling reactions were performed under aerobic condition. These efficient and reusable catalysts pave away to green chemistry, with great potential for industrial applications.
