Magnetically separable γ-Fe2O3 nanoparticles: An efficient catalyst for acylation of alcohols, phenols, and amines using sonication energy under solvent free condition
作者:Manohar A. Bhosale、Divya Ummineni、Takehiko Sasaki、Daisuke Nishio-Hamane、Bhalchandra M. Bhanage
DOI:10.1016/j.molcata.2015.04.002
日期:2015.8
range of 40–100 nm. The XPS study confirmed the Fe is in +3 oxidation state. The synthesized γ-Fe2O3 nanoparticles have been used as an efficient heterogeneous catalyst for the organic transformation between phenols, alcohols, and amines with acetic anhydride under sonication using mild reaction conditions. Various electrons withdrawing and electrons donating substrates show an excellent yield of desired
本文报道磁性可分离氧化铁(γ-Fe的简便合成2 ö 3使用热分解法)的纳米颗粒。合成的γ-Fe的结构和形态学研究2个ö 3纳米颗粒进行了使用X射线衍射(XRD),场发射枪扫描电子显微镜(FEG-SEM),能量分散型X射线光谱(EDS),透射电子显微镜(TEM),傅立叶变换红外光谱(FT-IR),热重分析(TGA)和X射线光电子能谱(XPS)技术。电子显微镜表明,γ-的Fe 2 ö 3纳米颗粒具有球形形态,粒径范围为40–100 nm。XPS研究证实,Fe处于+3氧化态。合成了γ-Fe 2 ö 3纳米颗粒已经被用作用于酚类,醇类,和胺之间在超声下用温和的反应条件下,有机转化用乙酸酐的高效多相催化剂。各种吸电子和电子给体底物表现出期望的产物的优良产率与磁分离和γ -铁的可重用性的优点2 Ó 3纳米催化剂。