Chemical Sciences Journal, vol.7, no.2, pp.109, 2016 (Refereed Journals of Other Institutions)
Bilgehan Guzel, Burcu Darendeli and Fatma Ulusal University of Cukurova, Turkey
Palladium-catalyzed carbon−carbon bond-forming reactions developed by Heck, Negishi and Suzuki, among others have made a critical impact on synthetic organic chemistry. In this regard, coupling reactions present wide applications in the production of polymers, agrochemicals, pharmaceutical intermediates, and high-tech materials. Palladium nanoparticles (Pd
NPs) provide high activity in catalyzing Suzuki cross coupling reactions, due to their high surface to area ratio. Silica, activated carbon, carbon nanotubes and alumina are used as support materials for Pd NPs to provide heterogeneous catalysis for the reaction. Four di erent support materials have been used and their catalytic activities were investigated. Pd NPs were prepared by supercritical carbon dioxide deposition method and vic-dioxime derivative Palladium complexes were used as precursors. Supported Pd nanoparticles were characterized by X-ray di raction (XRD), transmission electron microscopy (TEM) and scanning electron microscopy (SEM). XRD patterns showed that the size of nanoparticles changes between 2 and 10 nm.
Figure 1. Suzuki-Miyaura cross-coupling reaction results of various Pd(0) nanoparticles (Pd NPs)
e catalytic activities of Pd NPs were performed in Suzuki-Miyaura cross-coupling reactions. e reactant/product ratio was determined with gas chromotography (GC) and almost %100 conversion was got from alumına supported Pd NPs.
Bilgehan Güzel has completed his PhD at Çukurova University and Postdoctoral studies from Texas A&M University. He has published more than 9 papers in 2 media.
This research was supported by the Scientific Research Projects (BAP) program, University of Cukurova,Turkey.