A new Schiff-base complex of palladium nanoparticles on modified Fe3O4 with 3,5-diaminobenzoic acid (DAA) as a robust, reusable, and selective catalyst in the C N and C C coupling reactions
D. Singh, Kamini Singh, Vicky Jain, Subbulakshmi Ganesan, Junainah Abd Hamid, Mamata Chahar, Suman Saini, Munther Kadhim Abosaoda, Muhammad Atif, Mohammed A. El-Meligy
Abstract
A Pd Schiff base complex was immobilized onto the surface of magnetic Fe 3 O 4 as a novel, green, and recyclable heterogeneous nanocatalyst and fully characterized by TEM, XRD, FT-IR, BET, SEM, ICP-OES, EDS, TGA, and VSM techniques. The Fe 3 O 4 @SiO 2 @DAA@Schiff base-Pd(0) catalyst exhibits outstanding performance in catalyzing Buchwald-Hartwig and Stille coupling reactions, resulting in high yields of the corresponding products. This catalyst offers numerous benefits, such as a straightforward testing procedure, environmentally friendly reaction conditions, absence of hazardous solvents, quick reaction time, low catalyst usage, and the ability to be reused. Furthermore, the nanocatalyst could be effortlessly separated from the reaction mixture using a bar magnet, enabling its repeated recovery and reuse without compromising its stability or activity.