Catalyzing Ligand and Copper Free C-C Coupling Reactions by a New Heterogeneous Pd-Based Catalyst Composed of Sepiolite and Cyclodextrin Nanosponge

Cyclodextrin nanosponge (CDNS), and sepiolite were hybridized to prepare a support for embedding Pd nanoparticles and creat a novel heterogeneous catalyst, Pd@CDNS-Sepiolite, which can promote ligand and copper-free Heck and Sonogashira coupling reactions under mild reaction condition. The obtained catalyst was characterized by using different characteristic methods, including FTIR, TGA, SEM/EDS, TEM, XRD, ICP/AES and BET and its ability as a heterogeneous catalyst for ligand and copper-free Heck and Sonogashira coupling reactions in aqueous media is proved. The catalytic activity of Pd@CDNS-Sepiolite was superior compared to that of Pd@Sepiolite and Pd@CDNS, indicating the synergism between sepiolite and CDNS. Also, the catalyst was recyclable after several reaction runs with slight Pd leaching and loss of the catalytic activity.

کلیدواژه های Catalyzing Ligand and Copper Free C-C Coupling Reactions by a New Heterogeneous Pd-Based Catalyst Composed of Sepiolite and Cyclodextrin Nanosponge:

Sepiolite ، Cyclodextrin nanosponge ، Pd nanoparticles ، C-C coupling reactions