Alkyne-Protected Ruthenium Nanoparticles
| Autor: | Nathaniel B. Zuckerman, Shaowei Chen, Joseph P. Konopelski, Xiongwu Kang, Wei Chen, Debraj Ghosh |
|---|---|
| Rok vydání: | 2010 |
| Předmět: |
Photoluminescence
Chemistry Nanoparticle chemistry.chemical_element Crystal structure Photochemistry Surfaces Coatings and Films Electronic Optical and Magnetic Materials Ruthenium Metal General Energy visual_art visual_art.visual_art_medium Lithium Physical and Theoretical Chemistry Fourier transform infrared spectroscopy Absorption (chemistry) |
| Zdroj: | The Journal of Physical Chemistry C. 114:18146-18152 |
| ISSN: | 1932-7455 1932-7447 |
| DOI: | 10.1021/jp101053c |
| Popis: | Stable ruthenium nanoparticles protected by 1-octynyl fragments were synthesized by a wet chemical method. Transmission electron microscopic measurements showed that the resulting particles exhibited an average core diameter of 2.55 ± 0.15 nm with well-defined Ru crystalline lattice fringes. Because of the formation of Ru—C≡ bonds, the C≡C vibrational stretch was found in FTIR measurements to red-shift to 1936 cm−1 from 2119 cm−1 that was observed for monomeric 1-octyne. Interestingly, the nanoparticles underwent ligand exchange reactions with alkynyl lithium (e.g., 5-phenyl-1-pentynyl lithium) for further surface functionalization, as manifested in FTIR as well as 1H and 13C NMR measurements. Optically, whereas UV−vis absorption measurements exhibited only a featureless profile, the Ru nanoparticles displayed apparent photoluminescence with an emission peak at 428 nm, which was accounted for by intraparticle charge delocalization as a consequence of the strong Ru—C≡ bonds and the conducting Ru metal core... |
| Databáze: | OpenAIRE |
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