Abstract

Rise and decay transients of molecular orientation are simulated by computer for the enantiomers and racemic mixture of supercooled liquid fluorochloroacetonitrile. The rise transients are easily distinguishable in these three low temperature liquids and show a pronounced field dependence as predicted analytically by Morita from the Smoluchowski/Debye equation. An original result of this investigation is that the fall transients are accelerated considerably at constant temperature with respect to the equilibrium field-off orientational autocorrelation function. This is fundamental evidence for the use of non-linear Kramers equations for the description of molecular dynamics in the liquid state of matter at equilibrium.

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