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Synthesis of Ruthenium Nanoparticles Stabilized by Heavily Fluorinated Compounds
Author(s) -
Tristany M.,
Chaudret B.,
Dieudonné P.,
Guari Y.,
Lecante P.,
Matsura V.,
MorenoMañas M.,
Philippot K.,
Pleixats R.
Publication year - 2006
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.200600360
Subject(s) - small angle x ray scattering , ruthenium , materials science , high resolution transmission electron microscopy , transmission electron microscopy , nanoparticle , field emission gun , dynamic light scattering , chemical engineering , scanning electron microscope , aniline , crystallography , analytical chemistry (journal) , scattering , nanotechnology , organic chemistry , catalysis , optics , chemistry , composite material , engineering , physics
Abstract Ruthenium nanoparticles have been prepared by hydrogenation of the complex Ru(COD)(COT) (COD = 1,5‐cyclooctadiene, COT = 1,3,5‐cyclooctatriene) in the presence of i) heavily fluorinated solid compounds as stabilizers ( para ‐bis(perfluorooctyl)benzene, 2,4,6‐tris(perfluorooctyl)aniline, and the non‐functionalized 11 H ,11 H ,12 H ,12 H ,13 H ,13 H ,14 H ,14 H ,15 H ,15 H ,16 H , 16 H ‐perfluorohexacosane (C 10 F 21 ‐(CH 2 ) 6 ‐C 10 F 21 )); and ii) the liquid 1 H ,1 H ,2 H ,2 H ‐perfluorodecylamine. The particles have been characterized by IR spectroscopy, elemental analysis, transmission electron microscopy (TEM), high‐resolution TEM, wide‐ and small‐angle X‐ray scattering (WAXS and SAXS), and scanning electron microscopy with a field‐emission gun (SEM‐FEG). TEM images indicate the presence of aggregated small nanoparticles with a regular mean size of ca. 3 nm. These nanoparticles display the hexagonal close‐packed structure of bulk ruthenium, as shown by WAXS analysis. HRTEM and SEM‐FEG analyses reveal the tendency of the particles to self‐assemble into superstructures (spheres) that can be more or less well defined depending on the fluorinated compound and/or the reaction conditions. This behavior has been confirmed in one case by SAXS measurements attesting the presence of small nanoparticles that are closely packed into clusters.