Generation of uniform and small particle size of palladium onto the SH-decorated SBA-15 pore-walls: SBA-15/(SH)(X)Pd-NPY as a recoverable nanocatalyst for Suzuki-Miyaura coupling reaction in air and water

摘要

Uniform and small particle size of palladium was generated onto the SH-decorated SBA-15 pore-walls. The physicochemical properties of the SBA-15/(SH)(X)Pd-NPY were characterized by Fourier transform infrared spectroscopy (FT-IR), X-ray analysis (EDAX), N-2 adsorption/desorption isotherms (BET), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and thermal gravimetric analysis (TGA). The uniform distribution of Pd-NPs into SBA-15 pores was obtained by reduction of SBA-15/(SH)(2)PdCl2 using NaBH4. The resulting nanocatalyst was an effective catalyst in aerobic Suzuki-Miyaura cross coupling reaction in excellent yields with negligible leaching of Pd-NPs even in water. The SBA-15/(SH)(X)Pd-NPY, after easy separation from the reaction mixture, was reused 11 times with high product yields.