1. Apparent Molar Volumesand Expansivities of IonicLiquids [Cnmim]Br (n=4, 8, 10, 12) in Dimethyl Sulfoxide.
- Author
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Wang, Huiyong, Wang, Jianji, and Zhang, Shibiao
- Subjects
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MOLECULAR volume , *IONIC liquids , *DIMETHYL sulfoxide , *SOLUTION (Chemistry) , *TEMPERATURE effect , *ATMOSPHERIC pressure , *DILUTION - Abstract
Densities for solutions of [Cnmim]Br(n= 4, 8, 10, 12) ionic liquids (ILs) in dimethylsulfoxide (DMSO) have been determined as a function of ionic liquidconcentration at the temperature T= (293.15, 298.15,303.15, 308.15, and 313.5) K and atmospheric pressure. The apparentmolar volumes, apparent molar volumes at infinite dilution, and limitingapparent molar expansivities of the ILs have been obtained from theexperimental density data. These data were used to understand theeffect of the alkyl chain length of the ILs and experimental temperatureon the IL–DMSO interactions occurring in the studied solutions.It was shown that the apparent molar volumes at infinite dilutionincreased with increasing alkyl chain length of the ILs and temperatureof the systems. Furthermore, the values of the limiting apparent molarexpansibilities were found to be positive and decreasewith increasing temperature. [ABSTRACT FROM AUTHOR]
- Published
- 2012
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