Localized relaxational dynamics of succinonitrile

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dc.contributor.authorvan Eijck, Len_AU
dc.contributor.authorBest, ASen_AU
dc.contributor.authorLong, Sen_AU
dc.contributor.authorFernandez-Alonso, Fen_AU
dc.contributor.authorMacFarlane, Den_AU
dc.contributor.authorForsyth, Men_AU
dc.contributor.authorKearley, GJen_AU
dc.date.accessioned2009-09-30en_AU
dc.date.accessioned2010-04-30T05:04:49Zen_AU
dc.date.available2009-09-30en_AU
dc.date.available2010-04-30T05:04:49Zen_AU
dc.date.issued2009-08-20en_AU
dc.date.statistics2009-08-20en_AU
dc.description.abstractSuccinonitrile (N C-CH2-CH2-C N) is a good ionic conductor, when doped with an ionic compound, at room temperature, where it is in its plastic crystalline phase (Long et al. Solid State Ionics 2003, 161. 105: Alarco et al. Nat. Mater. 2004, 3, 476). We report on the relaxational dynamics of the plastic phase near the two first-order phase transitions and on the effect of dissolving a salt in the plastic matrix by quasi-elastic neutron scattering. At 240 K, the three observed relaxations are localized and we can describe their dynamics (iota approximate to 1.7, 17, and 140 ps) to a certain extent from a model using a single molecule that was proposed by Bee et al. allowing for all conformations in its unit cell (space group IM3M). The extent of the localized motion as observed is however larger than that predicted by the model and suggests that the isomerization of succinonitrile is correlated with a jump to the nearest neighbor site ill the unit cell. The salt containing system is known to be it good ionic conductor, and our results show that the effect of the ions on the succinonitrile matrix is homogeneous. Because the isomerizations and rotations are governed by intermolecular interactions, the dissolved ions have ail effect over ail extended range. Due to the addition of the salt, the dynamics of one of the components (iota approximate to 17 ps) shows more diffusive character at 300 K. The calculated upper limit of the corresponding diffusion constant of succinonitrile in the electrolyte is a factor 30 higher than what is reported for the ions. Our results suggest that the succinonitrile diffusion is caused by nearest neighbor jumps that are localized on the observed length and time scales. © 2009, American Chemical Societyen_AU
dc.identifier.citationvan Eijck, L., Best, A. S., Long, S., Fernandez-Alonso, F., MacFarlane, D., Forsyth, M., & Kearley, G. J. (2009). Localized relaxational dynamics of succinonitrile. Journal of Physical Chemistry C, 113(33), 15007-15013. doi:10.1021/jp9000847en_AU
dc.identifier.govdoc1314en_AU
dc.identifier.issn1932-7447en_AU
dc.identifier.issue33en_AU
dc.identifier.journaltitleJournal of Physical Chemistry Cen_AU
dc.identifier.pagination15007-15013en_AU
dc.identifier.urihttp://dx.doi.org/10.1021/jp9000847en_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/1871en_AU
dc.identifier.volume113en_AU
dc.language.isoenen_AU
dc.publisherAmerican Chemical Societyen_AU
dc.subjectIonic conductivityen_AU
dc.subjectRelaxationen_AU
dc.subjectDynamicsen_AU
dc.subjectPlasticityen_AU
dc.subjectIonsen_AU
dc.subjectSaltsen_AU
dc.titleLocalized relaxational dynamics of succinonitrileen_AU
dc.typeJournal Articleen_AU
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