Journal
JOURNAL OF MATERIALS CHEMISTRY
Volume 19, Issue 22, Pages 3624-3631Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/b821659b
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The synthesis of ruthenium nanoparticles, RuNPs from the organometallic complex (eta(4)-1,5-cyclooctadiene)(eta(6)-1,3,5-cyclooctatriene)ruthenium(0), Ru(COD)(COT) in various imidazolium derived ionic liquids, ILs: [RMIm][NTf2] (R = CnH2n (+ 1) with n = 2; 4; 6; 8; 10), and [R(2)Im][NTf2] (R=Bu) and [BMMIm][NTf2] has been performed, under 0.4 MPa of H-2, at 25 degrees C or at 0 degrees C with or without stirring. A relationship between the size of IL non-polar domains calculated by molecular dynamics simulation and the RuNP size measured by TEM has been found, suggesting that the phenomenon of crystal growth is probably controlled by the local concentration of Ru(COD)(COT) and consequently is limited to the size of the non-polar domains. Moreover, the rigid 3D organization based on C-2-H center dot center dot center dot anion bonding and chosen experimental conditions, could explain the non-aggregation of RuNPs.
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