Bis(NHC)-Pd(II) and Pd(۰) Complexes Supported on Magnetic SBA-۱۵ for TheSelective Aerobic Oxidation of Benzyl Alcohols to Benzaldehydes and Reduction ofNitroarenes

Synthesis and identification of a new magnetic SBA-AP-CC-bis(NHC)-Pd(II) catalyst wereperformed. The surface of magnetic SBA-۱۵ was subsequently treated with (۳-aminopropyl) triethoxysilane(APTES), cyanuric chloride (CC), imidazole, and ۲-Bromopyridine. The modified magnetic SBA-۱۵ was thenfurther reacted with separated prepared trans-[Pd(Cl)۲(SMe۲)۲] complex to give Fe۳O۴@SiO۲-SBA-AP-CCbis(NHC)-Pd(II).The grafted complex was then reduced with NaBH۴ to afford a supported Pd(۰).The obtainedcatalysts were characterized using Fourier transform infrared spectroscopy (FTIR), solid ۱۳CNMR and X-rayphotoelectron spectroscopy (XPS).The supported complex was used as an catalyst selective aerobic oxidationof benzyl alcohols to benzaldehydesand reduction of nitroarenes.

Keywords:

Magnetic SBA-۱۵ , Reduction of Nitroarenes , Aerobic Oxidation