Synthesis of Dendrimer Assisted Co-Pd Bimetallic Nanoparticles and Catalytic Activity for Suzuki–Miyaura Coupling Reactions

Abstract

Triazine-based dendrimer 2,4,6-tris(di-acetamido)-1,3,5-triazine encapsulated heterogeneous Co-Pd bimetallic nanoparticles (NPS) were prepared through sequential loading method from the dendrimer which was synthesized directly between the reaction of 2,4,6-triamino-1,3,5-triazine and acetyl chloride at room temperature about 2 hours. The physicochemical characteristics of Co-Pd bimetallic NPS were studied with the aid of EDX, XRD, TG& DSC techniques. The presence of cobalt was 55.75% and palladium was 9.40% of the mass of the 2,4,6-tris(di-acetamido)-1,3,5-triazine assisted Co-Pd Bimetallic NPs 4 observed from EDX analysis. The TG& DSC analysis curves indicated the thermal stability up to 320°C which is a very important steadiness key for catalytic effectiveness of the prepared Co-Pd Bimetallic NPs 4. The nano-shape FCC structure of Co-Pd bimetallic NPs was confirmed by XRD analysis. The average size of Co-Pd bimetallic NPs of 17.50 nm length was calculated through the Debye-Scherrer formula while TEM analysis showed the average particle size was 14.50 nm. The dendrimer was also analyzed by IR, 1HNMR, 13CNMR and elemental analysis. The catalytic performance of these nanoparticles' catalyst was explored for C–C coupling reactions such as Suzuki–Miyaura at moderate reaction conditions whereas the reusing potential of the catalyst was evaluated without noticeable loss of activity for five successive runs. All the results of the analysis of this catalyst make it a cost-effective and highly active catalyst for the carbon-carbon cross-coupling reactions which are demand in chemical and pharmaceutical industries.