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No fragile-to-strong crossover in LiCl-H2O solution.
- Source :
-
Journal of Chemical Physics . 3/28/2012, Vol. 136 Issue 12, p124512. 9p. 2 Charts, 8 Graphs. - Publication Year :
- 2012
-
Abstract
- Dynamics of water, especially in the temperature range of the 'no man's land', remain a mystery. We present detailed study of dynamics in aqueous LiCl solution that is often considered as a model for bulk water. We employ broadband dielectric and light scattering spectroscopy in a broad frequency and temperature range. Our analysis reveals no sign of the fragile-to-strong crossover (FSC) neither in structural relaxation nor in translational motions. Our experimental results combined with a large selection of literature data lead to the clear conclusion-there is no FSC in dynamics of aqueous solutions at T ∼ 200-230 K. Instead, our analysis reveals appearance of the so-called excess wing at the high frequency tail of the structural relaxation peak. We discuss the localized nature of the relaxation process that contributes to the excess wing. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00219606
- Volume :
- 136
- Issue :
- 12
- Database :
- Academic Search Index
- Journal :
- Journal of Chemical Physics
- Publication Type :
- Academic Journal
- Accession number :
- 73959732
- Full Text :
- https://doi.org/10.1063/1.3697841