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Superparamagnetic Fe3O4@Alginate supported L‐arginine as a powerful hybrid inorganic–organic nanocatalyst for the one‐pot synthesis of pyrazole derivatives
Applied Organometallic Chemistry ( IF 3.7 ) Pub Date : 2020-08-06 , DOI: 10.1002/aoc.5888
Sara Amirnejat 1 , Aliakbar Nosrati 1 , Shahrzad Javanshir 1
Affiliation  

Hybrid inorganic–organic material Fe3O4@Alg@CPTMS@Arg, was prepared by the layer‐by‐layer techniques through grafting l‐arginine (l‐arg) to Fe3O4@Alg using 3‐chloropropyltrimethoxysilane (CPTMS) as a linker. Fe3O4@Alg was prepared by in situ co‐precipitation of iron (iii) and iron (ii) chloride in the presence alginate (Alg). The hybrid inorganic–organic material was characterized employing various techniques such as Fourier transform infrared (FTIR), scanning electron microscopy (SEM), energy dispersive X‐ray spectroscopy (EDX), X‐ray diffraction (XRD), thermogravimetric analysis (TGA), and vibrating sample magnetometer (VSM). The as‐prepared Fe3O4@Alg@CPTMS@Arg nanoparticles mediated the synthesis of pyrazole derivatives with via one‐pot reaction between phenylhydrazine, malononitrile, and various aromatic aldehydes under reflux in ethanol. Recycled catalyst exhibited comparable efficacy after seven cycles. The high catalytic activity, excellent yields, as well as the recyclability of the hybrid nanomaterials with quantitative efficiency, are factors that render this environmentally benign procedure appealing.

中文翻译:

超顺磁性Fe3O4 @藻酸盐支持的L-精氨酸是一种强大的无机-有机杂化纳米催化剂,可一锅合成吡唑衍生物

无机-有机杂化材料Fe 3 O 4 @ Alg @ CPTMS @ Arg,是通过使用3-氯丙基三甲氧基硅烷(CPTMS)将l-精氨酸(l-arg)接枝到Fe 3 O 4 @Alg的逐层技术制备的作为链接器。Fe 3 O 4 @Alg是通过在藻酸盐(Alg)存在下原位共沉淀铁(iii)和氯化铁(ii)制备的。采用多种技术对无机-有机杂化材料进行了表征,例如傅立叶变换红外(FTIR),扫描电子显微镜(SEM),能量色散X射线光谱(EDX),X射线衍射(XRD),热重分析(TGA) ,以及振动样品磁力计(VSM)。制备的Fe 3 O4 @ Alg @ CPTMS @ Arg纳米粒子通过苯肼,丙二腈和各种芳香醛在乙醇中回流下的一锅反应,介导了吡唑衍生物的合成。七个周期后,回收的催化剂显示出可比的功效。高催化活性,优异的产率以及具有定量效率的杂化纳米材料的可回收性是使这种环境友好的方法具有吸引力的因素。
更新日期:2020-09-14
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