Spinel-type oxide MgMnO₃ and perovskite-type oxide SrMnO₃ have been synthesized by two-step procedures comprising the hydrothermal and solid-state methods. The as-prepared catalysts were characterized by X-ray powder diffraction, Fourier transform infrared spectroscopy, thermogravimetric analysis and the morphologies of the synthesized materials were figured out by field emission scanning electron microscopy. The catalytic performance of synthesized materials were investigated by synthesizing the polyhydroquinolines, which was used Design-Expert software and response surface methodology (central composite design) for optimization of reaction efficiently. The comparison study illustrates that MgMnO₃ has better catalytic performance than SrMnO₃ and optimized condition for the synthesis of polyhydroquinoline (which is produced by the reaction of ethyl acetoacetate, benzaldehyde, dimedone and ammonium acetate) was found to be 8 mg of MgMnO₃ as the catalyst, 33 min for the reaction time and 100 °C for the reaction temperature. This condition was used for the synthesis of other polyhydroquinoline derivatives.

中文翻译：

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MgMnO 3和SrMnO 3纳米催化剂通过Hantzsch反应合成聚氢喹啉和新衍生物的催化活性比较

尖晶石型氧化物MgMnO ₃和钙钛矿型氧化物SrMnO ₃通过包括水热法和固态法的两步法合成。通过X射线粉末衍射，傅立叶变换红外光谱，热重分析对所制备的催化剂进行表征，并通过场发射扫描电子显微镜确定了合成材料的形貌。通过合成多氢喹啉来研究合成材料的催化性能，使用Design-Expert软件和响应面方法（中心复合设计）有效地优化了反应。对比研究表明，MgMnO ₃具有比SrMnO ₃更好的催化性能。合成聚氢喹啉（由乙酰乙酸乙酯，苯甲醛，二甲酮和乙酸铵反应制得）的最佳条件为：MgMnO ₃为催化剂8 mg，反应时间为33 min，反应温度为100°C。反应温度。该条件用于合成其他聚氢喹啉衍生物。