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Título

Ion diffusion coefficients model and molar conductivities of ionic salts in aprotic solvents

Autor Garrido, Leoncio ; Mejía, Alberto ; García, Nuria ; Tiemblo, Pilar; Guzmán, Julio
Fecha de publicación 2015
EditorAmerican Chemical Society
Citación The Journal of Physical Chemistry B 119: 3097-3103 (2015)
ResumenIn the study of the electric properties of electrolytes, the determination of the diffusion coefficients of the species that intervene in the charge transport process is of great importance, particularly that of the free ions (D+ and D-), the only species that contribute to the conductivity. In this work we propose a model that allows, with reasonable assumptions, determination of D+ and D-, and the degree of dissociation of the salt, α, at different concentrations, using the diffusion coefficients experimentally obtained with NMR. Also, it is shown that the NMR data suffice to estimate the conductivity of the electrolytes. The model was checked by means of experimental results of conductivity and NMR diffusion coefficients obtained with solutions of lithium triflate in ethylene and propylene carbonates, as well as with other results taken from the literature.
URI http://hdl.handle.net/10261/112555
DOI10.1021/jp511075q
Identificadoresdoi: 10.1021/jp511075q
issn: 1520-5207
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