Antioxidant Properties of Synthesis Nanometallic Pd-Ni@2-Mercaptoethanol as Effective Catalyst for Suzuki-Miyaura Reactions

The palladium-catalyzed Suzuki coupling reaction is one of the most efficient strategies for constructing a carbon-carbon bond. In recent years, bimetallic catalysts have become candidates for the Suzuki coupling reaction. In this work, Pd-Ni@2-Mercaptoethanol nanoparticles were synthesized for the Suzuki-Miyaura cross-coupling of arylboronic acids with aryl bromides, in the N,Ndimethylformamide/ water mixture catalyzed by Pd-Ni: A simple and efficient reaction performed in a solvent, without a ligand, and in open air. We found that the Suzuki-Miyaura reactions are remarkably fast (5 min), with high yields and the products are highly pure. The Pd-Ni@2-Mercaptoetanol nanoparticles have a narrow size distribution with a mean crystallite size of 10 nm. Radical scavenging activities of the complexes have been evaluated by using DPPH, DMPD+ and ABTS+ assays. IC50 values (μg/ml) of the complexes and standards on DPPH, DMPD+ and ABTS+ respectively following the sequences.