EXAFS study of palladium complex catalysts immobilized on silica via a tripodal linker unit with amino groups

Introduction Immobilization of molecular catalysts via linkers on inorganic oxide supports is a promising strategy for facilitating the separation of catalysts from reaction mixtures and for assisting the catalyst recycling process. We have recently found that the amino palladium catalysts immobilized on a silica support via a tripodal linker unit (1Pd–3Pd) show high catalytic performance for the Suzuki-Miyaura coupling reaction (Scheme 1). In this study, Pd K-edge EXAFS measurements were performed to explore the local structure of palladium of 1Pd–3Pd.