Molecular reorientation in hydrogen-bonding liquids: through algebraic approximately t-32 relaxation toward exponential decay

The Journal of Chemical Physics
M F Gelin, D S Kosov

Abstract

We present a model for the description of orientational relaxation in hydrogen-bonding liquids. The model contains two relaxation parameters which regulate the intensity and efficiency of dissipation, as well as the memory function which is responsible for the short-time relaxation effects. It is shown that the librational portion of the orientational relaxation is described by an algebraic approximately t(-32) contribution, on top of which more rapid and nonmonotonous decays caused by the memory effects are superimposed. The long-time behavior of the orientational relaxation is exponential, although nondiffusional. It is governed by the rotational energy relaxation. We apply the model to interpret recent molecular dynamic simulations and polarization pump-probe experiments on HOD in liquid D(2)O [C. J. Fecko et al., J. Chem. Phys. 122, 054506 (2005)].

References

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Mar 3, 2005·The Journal of Chemical Physics·Christopher J FeckoAndrei Tokmakoff
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Citations

Sep 1, 2006·The Journal of Chemical Physics·M F Gelin, D S Kosov
Jan 28, 2012·The Journal of Chemical Physics·Maxim F GelinWolfgang Domcke
Dec 21, 2006·The Journal of Chemical Physics·M F Gelin, D S Kosov
Apr 10, 2009·The Journal of Chemical Physics·M F Gelin, D S Kosov
Oct 23, 2013·The Journal of Physical Chemistry. a·Maxim F Gelin, Wolfgang Domcke
Dec 15, 2006·The Journal of Physical Chemistry. a·Erik R BergDarin J Ulness
Mar 8, 2008·The Journal of Physical Chemistry. B·Janamejaya Chowdhary, Branka M Ladanyi

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