Chemoselective reduction of nitro and nitrile compounds using an Fe<sub>3</sub>O<sub>4</sub>-MWCNTs@PEI-Ag nanocomposite as a reusable catalyst
作者:Sara Ansari、Alireza Khorshidi、Shahab Shariati
DOI:10.1039/c9ra09561f
日期:——
efficient catalyst for chemoselective reduction of nitroaromatic and nitrile compounds to their corresponding amines in aqueous solution at ambient temperature. Nitrofurazone, a cytotoxic antibiotic, as a non-aromatic example was also reduced selectively at the nitro group without reduction of the other functionalities in the presence of Fe3O4-MWCNTs@PEI-Ag. The catalyst was magnetically recoverable
多壁碳纳米管 (MWNT)在用 Fe 3 O 4纳米粒子装饰之前用羧酸官能团 (MWCNT-(COOH) n ) 改性。聚乙烯亚胺 (PEI) 的进一步改性步骤产生了 Fe 3 O 4 -MWCNTs@PEI,这为银离子的配位和原位还原提供了合适的平台,从而获得了高度分散的 Fe 3 O 4 -MWCNTs@PEI-Ag 纳米复合材料银纳米粒子。Fe 3 O 4-MWCNTs@PEI-Ag杂化材料通过傅里叶变换红外光谱(FT-IR)、X射线衍射(XRD)、透射电子显微镜(TEM)、振动样品磁强计(VSM)、X射线等多种技术进行表征光电子能谱 (XPS) 和热重分析 (TGA),并被用作在环境温度下在水溶液中将硝基芳族化合物和腈化合物化学选择性还原为相应胺的有效催化剂。呋喃西林,一种细胞毒性抗生素,作为一个非芳香族的例子,在 Fe 3 O 4存在下也选择性地在硝基上被还原而不还原其他官能团-