Silica-supported PEI capped nanopalladium as potential catalyst in Suzuki, Heck and Sonogashira coupling reactions
We present the use of amine-functionalized silica (NH2-SiO2) as support for palladium nanoparticles (PdNPs) and the use of heterogeneous catalysts (Pd/NH2-SiO2) for the Suzuki, Heck and Sonogashira coupling reactions. The synthesized Pd catalyst is well characterized by XRD, HRTEM, BET, SEM-EDX, FT-IR, and UV–vis spectral techniques. It exhibits efficient catalytic activity for these coupling reactions without the assistance of ligand and copper salts.
Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (156 K)Download as PowerPoint slideHighlights► We have developed branched polymer PEI capped PdNPs for the coupling reactions. ► The Pd/SiO2 gives high product yields and improved catalytic activity. ► Polyelectrolyte capped PdNPs is effective and stable catalytic system. ► It is a simple, convenient and novel method for the coupling reactions.
Journal: Applied Catalysis A: General - Volume 455, 30 March 2013, Pages 247–260