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Preparation of Well‐Ordered Mesoporous‐Silica‐Supported Ruthenium Nanoparticles for Highly Selective Reduction of Functionalized Nitroarenes through Transfer Hydrogenation
Author(s) -
Wei Ning,
Zou Xiujing,
Huang Haigen,
Wang Xueguang,
Ding Weizhong,
Lu Xionggang
Publication year - 2018
Publication title -
european journal of organic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.825
H-Index - 155
eISSN - 1099-0690
pISSN - 1434-193X
DOI - 10.1002/ejoc.201701228
Subject(s) - chemistry , catalysis , ionic liquid , hydrazine (antidepressant) , transfer hydrogenation , chemoselectivity , ruthenium , mesoporous silica , mesoporous material , bromide , aqueous solution , hydrate , nanoparticle , heterogeneous catalysis , inorganic chemistry , organic chemistry , combinatorial chemistry , chemical engineering , chromatography , engineering
MCM‐41‐type mesoporous silica (OMS‐IL) was prepared by using an ionic liquid (1‐hexadecyl‐3‐methylimidazolium bromide) as a template. The XRD and TEM results demonstrated that OMS‐IL was more stable than the MCM‐41 material. Ru nanoparticles were supported on OMS‐IL (Ru/OMS‐IL) by impregnating OMS‐IL with a RuCl 3 aqueous solution, and the resulting material was used for the selective reduction of nitroarenes. The effects of the components of the catalysts and the reaction conditions on the catalytic behavior of the prepared catalysts were investigated in detail. Ru/OMS‐IL exhibited high catalytic activity and chemoselectivity for the reduction of various substituted nitroarenes to the corresponding aromatic amines in ethanol with hydrazine hydrate as a hydrogen donor under mild conditions. The Ru/OMS‐IL catalysts were highly stable and could easily be recovered by simple filtration over at least six recycling reactions without any observable loss in catalytic performance.