Ion solvation and association in LiClO4 – dimethylsulfoxide system

1Gorobets, MI
1Kirillov, SA
2Gafurov, MM
3Ataev, MB
3Tretyakov, DO
1Inter-Agency Department of Electrochemical Energy Systems of the NAS of Ukrain, Kyiv
2H. I. Amirkhanov Institute of Physics, Dagestan Scientific Center of the Russian Academy of Sciences , Makhachkala, Russia
3Analytical Center of Collective Use, Dagestan Scientific Centre of the Russian Academy of Sciences, Makhachkala, Russia
Dopov. Nac. akad. nauk Ukr. 2014, 1:125-129
Section: Chemistry
Language: Russian

Ionic equilibria in theLiClO4 – dimethylsulfoxide (DMSO) system at 90 ºC in a concentration range from 5 to 25% mole fractions of a salt have been investigated by means of Raman spectroscopy. Spectroscopic manifestations of hydrogen bonds between molecules of DMSO and ClO4 ions were detected. Concentrations of monomeric, dimeric, and solvating DMSO molecules; free solvent molecules and those included in the ClO4 ion solvation sphere; free anions, ion pairs, separated by a solvent, and contact ion pairs are identified. Conclusions have been made about the composition of all components of solutions.

Keywords: association, ion solvation, LiClO4 – dimethylsulfoxide

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