Inorg. Chem., 47 (8), 3292–3297, 2008. 10.1021/ic702305t
Web Release Date: March 14, 2008

Copyright © 2008 American Chemical Society

Palladium Nanoparticles Stabilized by an Ionic Polymer and Ionic Liquid: A Versatile System for C−C Cross-Coupling Reactions

Xue Yang,†‡ Zhaofu Fei,† Dongbin Zhao,† Wee Han Ang,† Yongdan Li,*‡ and Paul J. Dyson*†

Institut des Sciences et Ingénierie Chimiques, Ecole Polytechnique Fédérale de Lausanne (EPFL), CH 1015 Lausanne, Switzerland, and Department of Catalysis Science and Technology, School of Chemical Engineering, Tianjin University, Tianjin 300072, People's Republic of China

Received November 27, 2007

Abstract:

Highly stable palladium nanoparticles (Pd NPs), protected by an imidazolium-based ionic polymer (IP) in a functionalized ionic liquid (IL), have been prepared and characterized by transmission electron microscopy (TEM). These Pd NPs are excellent precatalysts for Suzuki, Heck, and Stille coupling reactions and can be stored without undergoing degradation for at least 2 years. The NP−IP−IL system may therefore be considered as an alternative to the traditional palladium on carbon (Pd/C) precatalyst employed in many C−C coupling reactions, also allowing reactions to be conducted under “solvent-free” conditions.

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