SYNTHESIS AND CHARACTERIZATION OF POLYSTYRENE SUPPORTED CATALYTICALLY ACTIVE POLY(AMIDOAMINE) DENDRIMER-PALLADIUM NANOPARTICLE CONJUGATES

摘要

Poly(amidoamine) dendrimers were synthesized on cross-linked aminomethyl polystyrene. Palladium complexes of supported dendrimers prepared by ligand exchange method were reduced to dendrimer-nanoparticle conjugates supported on polystyrene resin. The supported nanoparticles were used as heterogeneous catalysts for the Suzuki coupling between aryl boronic acids and aryl halides. Various factors affecting the catalysts performance were studied. Higher generation dendrimers gave well-defined nanoparticles without agglomeration and these particles showed good catalytic performance.