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| Format: | Artículo científico |
| Language: | en |
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Sociedade Brasileira de Física
2006
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| Online Access: | https://www.redalyc.org/articulo.oa?id=46436110 |
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Table of Contents:
- Lithium dynamics in molybdenum disulfide intercalation compounds studied by nuclear magnetic resonance José Pedro Donoso Claudio José Magon José Schneider Antonio Carlos Bloise Física, Astronomía y Matemáticas NMR Lithium dynamics Cluster architecture and lithium motion dynamics are investigated in nanocomposites formed by the intercalationof lithium and a dialkylamine (diethylamine, dibutylamine and dipentylamine) in molybdenum disulfideby means of 7Li Nuclear Magnetic Resonance (NMR) technique. The present contribution illustrates the potentialof the NMR techniques in the study of both the short range atomic structure and the local dynamicsof ions in these intercalation compounds. Structural information is gained through measurements of the variousinteractions (such as dipolar and quadrupolar) that affect the lineshapes of the NMR spectra, while iondynamics information is gained through the study of the effects that ionic motion has on the nuclear relaxationtimes, which are modulated by these interactions. The formation of lithium clusters in these nanocomposites issuggested by the Li-Li dipolar interaction strength calculated from the 7Li NMR data. The lithium spin-latticerelaxation is mainly due to the interaction between the quadrupolar moment of the 7Li nuclei and the fluctuatingelectric field gradient at the site of the nucleus, produced by the surrounding charge distribution. The relaxationmechanism is consistent with a fast exchange motion of lithium ions between the coordination sites within theaggregates. 2006 artículo científico 0103-9733 https://www.redalyc.org/articulo.oa?id=46436110 en http://www.redalyc.org/revista.oa?id=464 Brazilian Journal of Physics application/pdf Sociedade Brasileira de Física Brazilian Journal of Physics (Brasil) Num.1A Vol.36