Efficient cleavage of aryl ether C-O linkages by Rh-Ni and Ru-Ni nanoscale catalysts operating in water

被引：57

作者：

Bulut, Safak ^{[1
]}

Siankevich, Sviatlana ^{[1
]}

van Muyden, Antoine P. ^{[1
]}

Alexander, Duncan T. L. ^{[2
]}

Savoglidis, Georgios ^{[1
]}

Zhang, Jiaguang ^{[3
]}

Hatzimanikatis, Vassily ^{[1
]}

Yan, Ning ^{[3
]}

Dyson, Paul J. ^{[1
]}

机构：

[1] Ecole Polytech Fed Lausanne, Inst Sci & Ingn Chim, CH-1015 Lausanne, Switzerland

[2] Ecole Polytech Fed Lausanne, Interdisciplinary Ctr Electron Microscopy CIME, CH-1015 Lausanne, Switzerland

[3] Natl Univ Singapore, Dept Chem & Biomol Engn, 4 Engn Dr 4, Singapore 117576, Singapore

来源：

CHEMICAL SCIENCE | 2018年 / 9卷 / 25期

基金：

瑞士国家科学基金会;

关键词：

LIGNIN MODEL COMPOUNDS; BOND-DISSOCIATION ENTHALPIES; ORGANOSOLV LIGNIN; KRAFT LIGNIN; SELECTIVE HYDROGENATION; BIMETALLIC CATALYSTS; AROMATIC MONOMERS; NICKEL-CATALYST; METAL-CATALYSTS; HYDROGENOLYSIS;

D O I：

10.1039/c8sc00742j

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Bimetallic Ru-Ni and Rh-Ni nanocatalysts coated with a phase transfer agent efficiently cleave aryl ether C-O linkages in water in the presence of hydrogen. For dimeric substrates with weaker C-O linkages, i.e. alpha-O-4 and beta-O-4 bonds, low loadings of the precious metal (Rh or Ru) in the nanocatalysts quantitatively afford monomers, whereas for the stronger 4-O-5 linkage higher amounts of the precious metal are required to achieve complete conversion. Under the optimized, relatively mild operating conditions, the C-O bonds in a range of substituted ether compounds are efficiently cleaved, and mechanistic insights into the reaction pathways are provided. This work paves the way to sustainable approaches for the hydrogenolysis of C-O bonds.

引用

页码：5530 / 5535

页数：6

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