CAS OpenIR  > 中科院上海应用物理研究所2011-2019年
Activation of Aryl Chlorides in Water under Phase-Transfer Agent-Free and Ligand-Free Suzuki Coupling by Heterogeneous Palladium Supported on Hybrid Mesoporous Carbon
Duan, LL; Fu, R; Xiao, ZG; Zhao, QF; Wang, JQ; Chen, SJ; Wan, Y
2015
Source PublicationACS CATALYSIS
Volume5Issue:2Pages:575—586
Subtype期刊文献
AbstractIn this study, heterogeneous palladium catalysts supported on ordered mesoporous cobalt oxide-carbon nanocomposites were applied to the water-mediated Suzuki coupling reaction of chlorobenzene and phenylboronic acid and exhibited a high yield of biphenyl (49%) under mild reaction conditions free of phase-transfer agents and ligands. Product yields in the reaction of aryl chlorides containing electron-withdrawing groups attached to their benzene ring can reach approximately 90%. Thiol-functionalized mesoporous silica, which can trap soluble Pd species, was used to confirm the negligible leaching in solution and therefore heterogeneous reaction. This heterogeneous catalyst is stable, showing unobvious activity loss after 10 catalytic runs. Characterization by X-ray diffraction, transmission electron microscopy, X-ray photoelectron spectroscopy, X-ray absorption fine structure analysis, and N-2 sorption techniques revealed intercalated CoO nanoparticles inside a carbon matrix with uniform mesopore sizes (similar to 3 nm), high surface area (similar to 504 m(2)/g), and large pore volumes (similar to 0.38 cm(3)/g). Additionally, very small Pd clusters consisting of approximately three atoms and Pd-O bonds formed on the interface between CoO and Pd nanoparticles. The unsaturated coordinative Pd may be responsible for the activation of chlorobenzene in the absence of any additives or ligands. Uniform mesopores and the hydrophobic nature of the carbon support may also facilitate the mass transfer of the reactant molecules and enrichment inside pores. For comparison, the catalytic activities of Pd catalysts supported on pristine mesoporous carbon and carbon embedded with nickel oxide nanoparticles were also tested.
KeywordAbsorption Fine-structure Nonaqueous Ionic Liquids C-c Miyaura Reaction Pd Catalysts Aqueous-media Heck Reaction Nanoparticles Complexes Silica
Indexed BySCI
Language英语
Document Type期刊论文
Identifierhttp://ir.sinap.ac.cn/handle/331007/24391
Collection中科院上海应用物理研究所2011-2019年
Recommended Citation
GB/T 7714
Duan, LL,Fu, R,Xiao, ZG,et al. Activation of Aryl Chlorides in Water under Phase-Transfer Agent-Free and Ligand-Free Suzuki Coupling by Heterogeneous Palladium Supported on Hybrid Mesoporous Carbon[J]. ACS CATALYSIS,2015,5(2):575—586.
APA Duan, LL.,Fu, R.,Xiao, ZG.,Zhao, QF.,Wang, JQ.,...&Wan, Y.(2015).Activation of Aryl Chlorides in Water under Phase-Transfer Agent-Free and Ligand-Free Suzuki Coupling by Heterogeneous Palladium Supported on Hybrid Mesoporous Carbon.ACS CATALYSIS,5(2),575—586.
MLA Duan, LL,et al."Activation of Aryl Chlorides in Water under Phase-Transfer Agent-Free and Ligand-Free Suzuki Coupling by Heterogeneous Palladium Supported on Hybrid Mesoporous Carbon".ACS CATALYSIS 5.2(2015):575—586.
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