In the present study, anchored palladium onto the surface of organically modified mesoporous silica was successfully prepared via simple and inexpensive procedure. The prepared nanocatalyst was considered as robust and clean nano-reactor catalyst for Suzuki and Stille reactions and synthesis of sulfide. This ecofriendly heterogeneous catalyst was characterized by Fourier transform infrared spectroscopy, transmission and scanning electron microscopies, energy-dispersive X-ray spectroscopy, inductively coupled plasma optical emission spectroscopy, X-ray diffraction, thermal gravimetric analysis, and N adsorp- tion and desorption. Use of green medium, easy separation and workup, excellent reusability of the nanocatalyst, and short reaction time are outstanding advantages of this method. Keywords Heterogeneous catalyst · Palladium · Suzuki · Stille · Sulfides 1 Introduction (SBA-15 and MCM-41) are considered as a good support for anchoring palladium onto mesoporous silica and fabricating The rate of Heck, Stille, Sonogashira, Suzuki and Buchwald- heterogeneous Pd catalysts because of their easy prepara- Hartwig reactions is dramatically improved using homoge- tion and high surface area, outstanding stability, convenient neous palladium catalysis [1, 2]. However, the lack of sepa- catalyst recycling via filtration, resulting in high catalyst ration and reusability are drawbacks of this homogeneous loading capacity, and low toxicity and price [15–20]. Also, catalyst [3–5]. The separation problem
Journal of Porous Materials – Springer Journals
Published: May 30, 2018
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