Abstract

H₃PW₁₂O₄₀-amino-functionalized CdFe₁₂O₁₉@SiO₂ nanocomposite has been applied as an effective nanocatalyst for the preparation of imidazoles by three-component reactions of benzil, ammonium acetate, and benzaldehydes under solvent-free condition. H₃PW₁₂O₄₀-amino-functionalized CdFe₁₂O₁₉@SiO₂ nanocomposites has been identified by powder X-ray diffraction, scanning electronic microscopy, energy dispersive X-ray spectroscopy, vibrating sample magnetometer, thermal gravimetric analysis, and Fourier transform infrared spectroscopy. This method provides several benefits including easy work-up, the use solvent-free conditions, the low catalyst loading and the reusability of the catalyst. Recently the use of environmental and green catalysts which can be easily recycled has received significant attention. Besides environmental advantages, such recoverable catalysts can also provide a platform for heterogeneous catalysis, green chemistry, and environmentally benign protocols in the near future.

摘要

H ₃ PW ₁₂ O _40-氨基官能化的CdFe ₁₂ O ₁₉ @SiO ₂纳米复合材料已被用作无溶剂条件下苯甲酰，乙酸铵和苯甲醛三组分反应制备咪唑的有效纳米催化剂。H ₃ PW ₁₂ O _40-氨基官能化CdFe ₁₂ O ₁₉ @SiO ₂纳米复合材料已通过粉末X射线衍射，扫描电子显微镜，能量色散X射线光谱，振动样品磁力计，热重分析和傅里叶变换红外光谱进行了鉴定。该方法具有几个优点，包括后处理容易，使用无溶剂条件，催化剂用量低和催化剂的可重复使用性。近来，使用易于回收的环境和绿色催化剂已引起广泛关注。除了环境优势外，这种可回收的催化剂还可在不久的将来为多相催化，绿色化学和对环境有益的方案提供平台。