Pd(5%)-KIT-6, Pd(5%)-SBA-15 and Pd(5%)-SBA-16 catalysts in water extract of pomegranate ash: A case study in heterogenization of Suzuki-Miyaura reaction under external base and ligand free conditions

Real heterogenization of Suzuki-Miyaura cross-coupling (SMC) is arduous quest owing to unavoidable homogeneous mechanism of heterogeneous catalysts. This article reports a study of heterogenization of SMC using mesoporous silica supported Pd-nanoparticles (Pd-NPs) under ligand and external base free conditions. Pdmesoporous silica catalysts such as Pd-KIT-6, Pd (5%)-SBA-16 and Pd (5%)-SBA-15 were synthesized and studied for SMC in water extract of pomegranate ash (WEPA). Pd (5%)-KIT-6 was the best amongst, and successful reusability of Pd (5%)-KIT-6 and hot-filtration experiments indicated its high stability, conveys pure heterogenous mechanism over inevitable homogenous mechanism. The large choice of substrates, high stability of the catalyst in green and renewable medium & base systems, and absence of ligands are the luminary potencies of this inquest.

Automated summary

The study achieved heterogenization of platinum catalysts in green and renewable medium using mesoporous silica supported Pd nanoparticles, demonstrating high stability and reusability, which shows significant research value.