H3PW12O40/MCM-41 nanoparticles as efficient and reusable solid acid catalyst for the synthesis of quinoxalines

作者：Abdollahi Alibeik Mohammad^*; Heidari Torkabad Ezzat

来源：Comptes Rendus Chimie, 2012, 15(6): 517-523.

DOI：10.1016/j.crci.2012.04.005

• Mesoporous silica
• Nanoparticles
• Catalyst
• Solid acid
• Quinoxalines

The condensation reaction of 1,2-diketones and o-phenylenediamines was investigated in the presence of nano-sized mesoporous silica (MCM-41) supported 12-tungstophosphoric acid (TPA) as solid acid catalyst. Nano-sized MCM-41 was synthesized and the catalysts with different loading amounts of TPA (5-15 wt.%) were prepared and characterized by XRD, FT-IR and SEM techniques. The results confirm good dispersion of TPA on the solid support. The catalyst is reusable many times without loss in its activity.

• 出版日期2012-6