Abstract

Methionine-coated Fe₃O₄ nanoparticles, a magnetically reusable and environmentally friendly heterogeneous catalyst, was synthesized. The new catalyst was characterized by FT-IR spectra, XRD, SEM, and EDX analysis and was used to catalyze the cycloaddition of nitriles and sodium azide in DMSO at 120°C to give the corresponding 5-substituted 1H-tetrazoles. Methionine-coated Fe₃O₄ nanoparticles proved to be highly efficient for this organic reaction. The catalyst can be easily separated and reused several times without loss of activity. The proposed procedure also offers several benefits such as quick reaction, high yields, clean process, low-cost heterogeneous catalyst, low loading of catalyst, and simple operation.

中文翻译：

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蛋氨酸涂层的Fe 3 O 4纳米颗粒：一种高效且可重复使用的纳米磁性催化剂，用于合成5-取代的1 H-四唑。

摘要

合成了蛋氨酸包覆的Fe ₃ O ₄纳米粒子，该粒子可磁性重复使用且对环境友好。通过FT-IR光谱，XRD，SEM和EDX分析对新催化剂进行表征，并用于在120℃下在DMSO中催化腈和叠氮化钠的环加成反应，得到相应的5-取代的1 H-四唑。蛋氨酸涂层的Fe ₃ O ₄纳米粒子被证明对这种有机反应非常有效。该催化剂可以容易地分离并重复使用几次而不会损失活性。所提出的方法还具有许多优点，例如反应速度快，产率高，清洁工艺，低成本的非均相催化剂，催化剂的低负载量和简单的操作。