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Carbene-functionalized ruthenium nanoparticles

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CHEMISTRY OF MATERIALS
卷 18, 期 22, 页码 5253-5259

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AMER CHEMICAL SOC
DOI: 10.1021/cm061595l

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Stable ruthenium nanoparticles were synthesized by protecting the particles with diazo molecules that reacted readily with the ruthenium surface forming Ru = C carbene bonds, as manifested in Fourier transform infrared and H-1 NMR measurements. The resulting particles, with the core diameter averaged at 2.12 +/- 0.72 nm as determined by transmission electron microscopic measurements, showed a Mie scattering profile in optical absorption measurements. In electrochemical studies, the particles exhibited interesting quantized charging characteristics, similar to those observed with alkanethiolate-protected gold (AuSR) nanoparticles. In addition, a proof-of-concept experiment was carried out to demonstrate that metathesis reactions on ruthenium surfaces might be exploited for the chemical functionalization of the particles through efficient surface place exchange reactions. H-1 NMR spectroscopy was used to monitor the reaction kinetics which exhibited a rate constant twice that observed with AuSR particles with another thiol ligand.

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