Polarized Raman spectroscopic study on the solvent state of glassy LiCl aqueous solutions and the state of relaxed high-density amorphous ices

2011 ◽  
Vol 134 (24) ◽  
pp. 244511 ◽  
Author(s):  
Yoshiharu Suzuki ◽  
Yasunori Tominaga
Keyword(s):  
Aqueous Solutions ◽  
Spectroscopic Study ◽  
The State ◽  
High Density ◽  
Raman Spectroscopic ◽  
Raman Spectroscopic Study ◽  
Amorphous Ices ◽  
Polarized Raman

Raman Spectroscopic Study of the Ion Association of Lithium Sulfate Aqueous Solutions

1995 ◽  
Vol 50 (2-3) ◽  
pp. 292-300 ◽  
Author(s):  
Fernando Rull
Keyword(s):  
Aqueous Solutions ◽  
Spectroscopic Study ◽  
Association Constant ◽  
Profile Analysis ◽  
Dynamic Properties ◽  
Ion Association ◽  
Sulfate Ions ◽  
Raman Spectroscopic ◽  
Raman Spectroscopic Study ◽  
Band Profile

Abstract A Raman spectroscopic study of Li2SO4 aqueous solutions as function of concentration and temperature was performed. The dynamic properties of the sulfate ions were studied by a band profile analysis of their internal modes using Fourier transform methods. This analysis reveals the perturbation of the SO4-2 vibrations due to ionic interactions. From the v1 (SO4-2) band profile the spectroscopic ionic association constant was calculated in the range from 5 to 80 °C. The large difference found between the values thus obtained for the association constant and the values obtained from macroscopic measurements is interpreted, assuming that Raman spectra reflect only the short-range forces acting on the ions. Using the Bjerrum equation to calculate the contribution for the long-range forces, good agreement is found between the spectroscopic and macroscopic results.

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