New Method for Facile Synthesis of Amphiphilic Thiol-Stabilized Ruthenium Nanoparticles and Their Redox-Active Ruthenium Nanocomposite

• Published in: Langmuir Vol. 21; no. 26; pp. 12093 - 12095
• Main Authors: Tsukatani, Takashi, Fujihara, Hisashi
• Format: Journal Article
• Language: English
• Published: Washington, DC American Chemical Society 20.12.2005
• Subjects: Chemistry; Colloidal state and disperse state; Exact sciences and technology; General and physical chemistry; Physical and chemical studies. Granulometry. Electrokinetic phenomena; Water; Transmission microscope; Thiol; Ruthenium; Dithiol; Nanoparticle; Lithium; Transition metal; Exchange reaction; Electron microscopy; Particle; Chemical reduction; Solid state; Organic solvent; Synthesis; Distribution; Nanocomposite; Aggregate; Platinoid
• ISSN: 0743-7463; 1520-5827
• DOI: 10.1021/la052332t

The one-phase reduction of RuCl3 with lithium triethylborohydride as a reductant in tetrahydrofuran in the presence of 1-octanethiol, 1-octadecanethiol, 1,1‘-binaphthalene-2,2‘-dithiol, or oligoethyleneoxythiol gave organic solvent- and water-soluble thiol-stabilized ruthenium nanoparticles. The oligoethyleneoxythiol-stabilized ruthenium nanoparticles were soluble in both water and organic solvents. The ruthenium nanoparticles were stable in the solid state and did not aggregate in solution. Transmission electron microscope images of the ruthenium nanoparticles reveal small dispersed particles with a narrow size distribution. The ligand-exchange reaction of octadecanethiol-stabilized ruthenium nanoparticles (2.0 nm) with phenothiazine-linked decanethiol afforded redox-active phenothiazine-functionalized ruthenium nanoparticles (1.9 nm) that showed a reversible redox peak at +0.51 V (vs Ag/0.1 M AgNO3) in the cyclic voltammogram.