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Communication | Special issue | Vol 80, No. 2, 2010, pp.925-931
Published online, 18th December, 2009
DOI: 10.3987/COM-09-S(S)128
Water-Soluble Palladium and Gold Nanoparticles Functionalized by a New Phosphine with Zwitterionic Liquid Based on Imidazolium Sulfonate Linked Ethylene Glycol Moiety

Taichi Akiyama, Chiharu Ibata, and Hisashi Fujihara*

*Department of Applied Chemistry, Kinki University, 3-4-1, Kowakae, Higashi-Osaka 577-8502, Japan


A new phosphine with zwitterionic liquid based on imidazolium sulfonate linked ethylene glycol moiety (1) as a protective ligand for metal nanoparticles has been prepared. Its phosphine 1-stabilized palladium and gold nanoparticles (1-Pd and 1-Au) were found to be soluble in water, and remarkably stable in high concentration of aqueous electrolyte and ionic liquid. 1-Pd nanoparticles behave as an efficient catalyst for the Suzuki cross-coupling reaction in an aqueous medium.