Palladium nanoparticles encapsulated in MIL-101-NH2 catalyzed one-pot reaction of Suzuki-Knoevenagel reaction.

Abstract Bifunctional Cr-MOF catalysts containing palladium nanoparticles (NPs) have been prepared. Combining the high activity of Pd NPs and base sites in MIL-101-NH 2 , the catalysts (Pd@MIL-101-NH 2) exhibited distinct catalytic activity in a one-pot Suzuki-Knoevenagel reaction. Pd@MIL-101-NH 2 has been characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), thermogravimetric analysis (TGA), and fourier transform infrared spectroscopy (FT-IR). Various substituted phenylboronic acids were used to research the one-pot reaction. The results were highly satisfactory, not only got high yield, but reduced reaction time. Leakage experiments further demonstrated that there is no leaching of active palladium nanoparticles during the reactions. Catalysts could be reused for at least five cycles and activity is not significantly decreased. Graphical abstract In this paper, Pd@MIL-101-NH 2 were synthesized, which was used as heterogeneous catalysts for one-pot Suzuki-Knoevenagel reactions. As expected that Pd@MIL-101-NH 2 exhibited remarkably catalytic activity and selectivity. Moreover, other reaction conditions have also been explored involving solvents, reaction temperatures and other catalysts for the sake of achieving the best catalytic efficiency. Unlabelled Image Highlights • Pd@MIL-101-NH 2 composite was synthesized by a facile method. • Pd@MIL-101-NH 2 composite is Bifunctional catalyst • Pd@MIL-101-NH 2 composite may be an effective catalyst for one-pot Suzuki-Knoevenagel reactions in industry [ABSTRACT FROM AUTHOR]