Poly(o-aminothiophenol)-stabilized Pd nanoparticles as efficient heterogenous catalysts for Suzuki cross-coupling reactions

Abstract

Poly(o-aminothiophenol) (PATP)-stabilized Pd nanoparticles with Pd nanoparticles embedded in a polymer matrix have been obtained through a facile one-step route by mixing o-aminothiophenol monomer and Pd(NO₃)₂ in an acidic aqueous solution without additional template or surfactant. The redox reaction between o-aminothiophenol and Pd(NO₃)₂ leads to the simultaneous formation of a PATP polymer and Pd nanoparticles. The PATP-stabilized Pd nanoparticles have been characterized by TEM, FTIR, XRD, ICP-MS and XPS. Catalytic results showed that PATP-stabilized Pd nanoparticles were highly stable and active catalysts for Suzuki cross-coupling reactions, where high yields could be achieved with arylboronic acid and aryl halides bearing a variety of substituents.