A nanoparticulate polyacetylene-supported Pd(II) catalyst combining the advantages of homogeneous and heterogeneous catalysts

A novel nanoparticulate polyacetylene-supported Pd(II) catalyst (NP-Pd(II)) for use in the aqueous Suzuki-Miyaura cross coupling reaction was successfully synthesized by simply treating an aqueous solution of PdCl42– with acetylene under ambient conditions. Electron microscopy, Fourier transform infrared spectroscopy, Raman spectroscopy, X-ray diffraction, X-ray photoelectron spectroscopy and X-ray absorption spectroscopy were employed to characterize the NP-Pd(II) structure in detail. These analyses demonstrated that the Pd atoms in the NP-Pd(II) were present as Pd(II) and were coordinated with both the Cl atoms and the C=C bonds of the polyacetylene. Both the homogeneous distribution of the Pd(II) along the polyacetylene backbone and the aggregation of the NP-Pd(II) in solution work in conjunction to make this material an ideal catalyst, combining the advantages of both homogeneous and heterogeneous catalysts.

Graphical AbstractReacting acetylene with an aqueous PdCl42– solution allows the facile and readily scalable synthesis of a nanoparticulate polyacetylene-supported Pd(II) catalyst that exhibits excellent activity in aqueous Suzuki-Miyaura coupling reactions.Figure optionsDownload as PowerPoint slide