Imidazolium-Based Zwitterionic Surfactant: A New Amphiphilic Pd Nanoparticle Stabilizing Agent

• Published in: Langmuir Vol. 28; no. 1; pp. 833 - 840
• Main Authors: Souza, Bruno S, Leopoldino, Elder C, Tondo, Daniel W, Dupont, Jairton, Nome, Faruk
• Format: Journal Article
• Language: English
• Published: Washington, DC American Chemical Society 10.01.2012
• Subjects: Catalysis; Chemistry; Colloidal state and disperse state; Exact sciences and technology; General and physical chemistry; Materials: Nano-and Mesostructured Materials, Polymers, Gels, Liquid Crystals, Composites; Physical and chemical studies. Granulometry. Electrokinetic phenomena; Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry; Water; Catalytic reaction; Chloroform; Amphoteric surfactant; Nanoparticle; Light scattering; Transition metal; Palladium; X ray; Surfactant; X ray diffraction; Hydrogenation; Powder; Transmission electron microscopy; Energy; Dynamics; Recycling; Platinoid; Ethylenic compound
• ISSN: 0743-7463; 1520-5827
• DOI: 10.1021/la203501f

Palladium nanoparticles (NPs) with an average size of 3.4 nm were prepared in water using imidazolium-based surfactant 3-(1-dodecyl-3-imidazolio)propanesulfonate (ImS3-12) as a stabilizer. The Pd NPs are highly dispersible in water and chloroform and were characterized by transmission electron microscopy, energy-dispersive X-ray spectroscopy, powder X-ray diffraction, and dynamic light scattering. The results indicate that in water the NP surface is covered with a double layer of ImS3-12 molecules. The NPs were effective in the aqueous biphasic hydrogenation of cyclohexene, with easy recycling and no loss of catalytic activity after four successive runs.