第一作者：Junjie Zhou

通讯作者：Hong-bin Sun,Qionglin Liang

合写作者：Yunong Li, Zhike Tang, Li Qi, Lei Liu, Yongjian Ai, Shuang Li, Zixing Shao

发表刊物：Green Chemistry

期号：14

卷号：19

影响因子：9.3

DOI码：10.1039/c7gc00986k

所属单位：Department of Chemistry, Northeastern University

教研室：物理化学

刊物所在地：ENGLAND

摘要：A core-shell structured nanocatalyst (Fe3O4@SiO2-NH2-RhNPs@mSiO(2)) that is encapsulated with porous silica has been designed and prepared for catalyzing the transfer hydrogenation of nitro compounds into corresponding amines. Rh nanoparticles serve as the activity center, and the porous silica shell plays an important role in the slow-release of the hydrogen source hydrazine. This reaction can be carried out smoothly in the green solvent water, and the atom economy can be improved by decreasing the amount of hydrazine hydrate used to a stoichiometric 1.5 equivalent of the substrate. Significantly, high catalytic efficiency is obtained and the turnover frequency (TOF) can be up to 4373 h(-1) in the reduction of p-nitrophenol (4-NP). A kinetics study shows that the order of reaction is similar to 0.5 towards 4-NP, and the apparent active energy E-a is 58.18 kJ mol(-1), which also gives evidence of the high catalytic efficiency. Additionally, the excellent stability of the catalyst has been verified after 15 cycles without any loss of catalytic activity, and it is easily recovered by a magnet after reaction due to the Fe3O4 nucleus.

关键字：Aromatic Nitro-Compounds;chemoselective Transfer Hydrogenation;Oxide Hydroxide Catalyst; Cross-Coupling Reactions;Room-Temperature;Microwave Irradiation;Nitrophenol Reduction;Nickel Nanoparticles;Supported Hydrazine;Recyclable Catalyst

论文编号：WOS:000405685000023

学科门类：理学

一级学科：化学

页面范围：3400-3407

ISSN号：1463-9262

是否译文：否