Article ID Journal Published Year Pages File Type
5413767 Journal of Molecular Liquids 2006 7 Pages PDF
Abstract
In the context of the dynamical characterisation of liquid systems, in this paper we critically compare methodological approaches formulated for the determination of the dynamics in complex molecular liquids. We will show that the experimental vibrational relaxation of the ν(CN) mode of the ME6N liquid crystal in the isotropic phase is successfully reproduced, at long times (t > 3 ps), by the non-Markovian modelling of the perturbation modulation proposed by Rothschild et al.. The non-hydrodynamic behavior of the orientational relaxation times obtained for the same normal mode confirms the picture of pseudo-nematic domains persisting in the isotropic phase of this liquid crystal well above the nematic-isotropic (N-I) transition. Finally, the comparison of the time and frequency domain methods for the determination of dynamical parameters indicates their qualitative equivalence.
Related Topics
Physical Sciences and Engineering Chemistry Physical and Theoretical Chemistry
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