Magnetite (Fe3O4) silica based organic–inorganic hybrid copper(ii) nanocatalyst: a platform for aerobic N-alkylation of amines
作者:Rakesh K. Sharma、Yukti Monga、Aditi Puri、Garima Gaba
DOI:10.1039/c3gc40818c
日期:——
A magnetically recoverable, efficient and selective copper based nanocatalyst has been synthesised via covalent grafting of 2-acetylthiophene on a silica coated magnetic nanosupport followed by metallation with copper acetate. The obtained organicâinorganic hybrid nanomaterial has been characterized by electron microscopy techniques (SEM and TEM with EDS), XRD, VSM, FT-IR and AAS. The catalytic performance of the novel nano-catalyst is evaluated in the active transformation of various aromatic amines to industrially-important alkylated amines. The nanocomposites afford high turnover frequency and high selectivity for amines under aerobic conditions. Furthermore, the heterogeneous nature of the catalyst allows easy magnetic recovery and regeneration, which makes the present protocol highly beneficial to address the industrial needs and environmental concerns.
通过共价接枝2-乙酰噻吩于涂覆二氧化硅的磁性纳米载体上,随后以乙酸铜进行金属化处理,成功合成了一种磁性可回收、高效且选择性的铜基纳米催化剂。该获得的有机-无机杂化纳米材料通过电子显微技术(SEM和TEM配备EDS)、XRD、VSM、FT-IR和AAS进行了表征。这种新型纳米催化剂的催化性能在多种芳香胺向工业重要的烷基化胺的活性转化过程中得到了评估。在有氧条件下,纳米复合材料表现出高周转频率和高胺类选择性。此外,催化剂的非均质性质使得其易于通过磁性进行回收和再生,这使得本协议在满足工业需求和环境关切方面具有高度益处。