کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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65909 | 48409 | 2013 | 8 صفحه PDF | دانلود رایگان |
Zinc oxide is a multi-purpose active material with important catalytic applications. In this study, nano-sized ZnO particles were easily synthesized through sedimentation of zinc acetate di-hydrate in absolute ethanol and were characterized by XRD and SEM. The XRD results indicated pure wurtzite structure with the average particle size of 26.9 nm for the nano-particles. It was observed that size of ZnO nano-particles was decreased while solution concentration was increased. This observation would be explained considering enhancing nucleation processes of nano-particles at high concentration of zinc acetate. The prepared nano-particles (2.5 mol%) were used as catalyst for the fast and efficient synthesis of 2-aminothiophenes under solvent free conditions. The three-component mixture of a carbonyl compound, malonodinitrile, and elemental sulfur was converted into the corresponding 2-aminothiophene in moderate to high yields with excellent selectivity.
The nano-sized ZnO particles were easily synthesized through sedimentation of zinc acetate di-hydrate in absolute ethanol and were characterized by XRD and SEM. The prepared nano-particles (2.5 mol%) were used as catalyst for the fast and efficient synthesis of 2-aminothiophenes under solvent free conditions.Figure optionsDownload high-quality image (181 K)Download as PowerPoint slideHighlights
► Easy preparation of nano-sized ZnO by sedimentation method.
► New and efficient method for the synthesis of 2-aminothiophenes.
► A highly reusable heterogeneous catalyst.
Journal: Journal of Molecular Catalysis A: Chemical - Volumes 368–369, March 2013, Pages 16–23