Journal
DALTON TRANSACTIONS
Volume 43, Issue 42, Pages 15752-15759Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4dt01856g
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Funding
- National Natural Science Foundation of China [21171124, 21171125]
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences [201201006]
- Qin-Lan Project
- 333 Project of Jiangsu Province
- Priority Academic Program Development of Jiangsu Higher Education Institutions
- SooChow Scholar Program of Soochow University
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DMF-stabilized Au nanoparticles (NPs) with three different particle sizes were prepared by controlling the reaction temperatures and times. In the absence of any additional ligands, these Au NPs showed high catalytic activity in the Ullmann homocoupling of aryl iodides in DMF. The effects of Au particle size on the coupling reaction were investigated by the use of three Au catalysts with mean particle sizes of ca. 1.0 nm, 2.5 nm, and 5.5 nm, respectively. The catalytic activity of the Au NPs was found to be in the order of Au (2.5 nm) > Au (<1.0 nm) > Au (5.5 nm), indicating that surface Au atoms do not have the same catalytic activity toward such a homocoupling reaction.
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