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

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• 作者：Mohammad Abdollahi-Alibeik ; ^{abdollahi@yazduni.ac.fr} ; Ezzat Heidari-Torkabad
• 关键词：Mesoporous silica ; Nanoparticles ; Catalyst ; Solid acid ; Quinoxalines
• 刊名：Comptes Rendus Chimie
• 出版年：2012
• 期刊代码：119_16310748
• 类别：ch
• 出版时间：June, 2012
• 卷：15
• 期：6
• 页码：517-523
• 文件大小：782 K

摘要

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.