Preparation And Characterization Of FDU-type Mesoporous Phenolic Resin-Supported Ligand-Palladium Complex Catalysts And Its Application In Crossing Coupling Reactions

Well-ordered mesopolymers materials are a class of advanced materials,which possess the textural porosities of mesoporous materials(high surface area, well-ordered pores and tunable structures) and simultaneously the advantages of organic polymers(high hydrophobicity,easy functionalization,higher stability in acid or base media in comparison to silica-base materials).This thesis was focused on two sections.In the first section,FDU-type mesoporous phenolic resin-supported diphenylphosphine-palladium complex catalysts FDU-14-PPh₂/Pd(0) has been developed.It shows excellent activity in Heck and Suzuki coupling reactions which can be performed successfully without an inert atomsphere.The FDU-14-PPh₂/Pd(0) catalyst was characterized by means of XRD,TEM,N₂ adsorption-desorption and elemental analysis,etc.The results indicated that the mesoporous structure of FDU-type mesoporous phenolic resin was not affected by the immobilization of palladium complexs.However,the pore diameter,pore volume and BET surface area were decreased.Do not need the extra intertia atmosphere.The catalytic performance of the catalyst was measured in Heck and Suzuki coupling reactions and showed high catalytic activity.Both electron-rich and electron-deficient substrates with methyl acrylate proceeded well and gave high yields for the corresponding products(80-96%) in Heck reaction.The supported catalyst can be easily separated from the reaction system and reused without lost of activity for at least eghit times.Both electron-rich and electron-deficient substrates with arylboronic acids proceeded well and gave high yields for the corresponding products(86-97%) in Suzuki reaction.The catalyst can be reused seven times without lost of activity.In the second section,FDU-type mesoporous phenolic resin-supported N-hterocyclic carbene(NHC)-palladium complex catalyst FDU-14-Mim/Pd(â…¡) has been developed.The catalyst was characterized by X-ray diffraction,N₂ adsorption-desorption and measured its catalystic ability in Sonogashira reaction.The results indicated the catalyst is efficient for Sonogashira coupling reaction but the leaching of palladium is detected during the reactions.Further studies on the recyclable of the catalyst are now in progress.