Chemical vapor deposition of Pd(C3H5)(C5H5) for the synthesis of reusable Pd@ZIF-8 catalysts for the Suzuki coupling reaction

A zeolite-imidazolium-framework-supported Pd-based heterogeneous catalyst (Pd@ZIF-8) was prepared by a metal-organic chemical vapor deposition method under mild conditions using Pd(C3H5)(C5H5) as the Pd precursor. N2 adsorption and pore size distribution data showed that ZIF-8 and Pd@ZIF-8 both possessed high surface areas. Transmission electron microscopy images showed that Pd nanoparticles with sizes of about 1.5–3.5 nm were homogeneously dispersed on the ZIF-8 support in Pd@ZIF-8. The Pd@ZIF-8 catalyst showed good activity in Suzuki coupling reactions with several different kinds of aryl halides. It could be reused at least six times without dramatic loss of activity or decomposition of the ZIF-8 structure.

Graphical AbstractPd@ZIF-8 was prepared by the metal-organic chemical vapor deposition method using Pd(C3H5)(C5H5) as the Pd precursor. The Pd@ZIF-8 catalyst, which contains well-dispersed Pd particles, was an effective and recyclable catalyst in Suzuki coupling reactions.Figure optionsDownload full-size imageDownload as PowerPoint slide