کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9575311 | 1504345 | 2005 | 11 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Isotope effects on the hydrodynamic fluctuations of self-associating fluids. A comparison between the Brillouin scattering of 1-octanol and its hydrocarbon chain perdeuterated analogue
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موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
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چکیده انگلیسی
In this study we extend a previously developed theoretical model for concentration fluctuations of one-component fluids containing both associated and unassociated species. The model has been developed in order to explain the non-Landau behavior observed in self-associating fluids in the hydrodynamic regime. The complex dynamics for the different species formation is treated in the approximation of a pseudo two-components fluid formed by unbound molecules coexisting with a unique associated specie, the mean aggregation number of which is dictated by thermodynamic requirements. The model can be applied to rationalize the behavior of chain-forming hydrogen-bonding systems. Here, we report Rayleigh-Brillouin scattering data of 1-octanol and its chain perdeuterated analogue over a wide range of temperatures and wave vectors. The model explains, albeit qualitatively, most of the observed deviations from the Landau behavior observed in the Rayleigh-Brillouin spectra at different values of the k-vector.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemical Physics - Volume 314, Issues 1â3, 18 July 2005, Pages 199-209
Journal: Chemical Physics - Volume 314, Issues 1â3, 18 July 2005, Pages 199-209
نویسندگان
Paola Sassi, Antonio Raudino, Rosario Sergio Cataliotti,