Abstract
We have investigated stochastic motions of the cations of the pyridinium based ILs (1-butylpyridinium bis(trifluoromethylsulfonyl)imide [BuPy][Tf2N], 1-dodecylpyridinium bis(trifluoromethylsulfonyl)imide [C12Py][Tf2N]) with different length of the alkyl substituent attached to the pyridinium ring. The accessible observation time at the instrument enabled us to consider the slower long-range motion and the faster localized one. Both of the processes are affected by the length of the alkyl chain. For better understanding of the localized process the quasielastic neutron scattering (QENS)-spectra of partially deuterated samples have been analyzed as well.
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