Abstract
The densities, dynamic viscosities, and electrical conductivities of the ionic liquid (IL) 1-ethyl-3-methylimidazolium thiocyanate ([C2mim][SCN]) and its mixtures with propylene carbonate(PC) were measured as functions of temperature over the whole composition range at atmospheric pressure. The excess molar volumes (V E) and dynamic viscosity deviations (Δη) of the mixtures were calculated and the change of V E and Δη were fitted by the Redlich–Kister (R–K) polynomial equation. The temperature dependences of dynamic viscosity and electrical conductivity of the mixture were graphically described by the Vogel–Fulcher–Tammann (VFT) equation. The Casteel–Amis four-parameter (C–A) equation was used to described the electrical conductivities dependences of IL mole fraction. To describe the intermolecular interactions of the mixtures, the optimized structures and energetics of each component of the mixture are calculated by DFT method. The hydrogen bonding between 1-ethyl-3-methylimidazolium cation([C2mim]+) and PC are enhanced, and the addition of PC can weaken the interaction between the [C2mim]+ and [SCN]−.
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Acknowledgements
This work was supported by Zhenjiang Science and Technology Innovation Fund (GY2019022) and Jiangsu Universities Blue Project 2019 (Outstanding Young Teacher), the Project of Science and Technology Department of Liaoning Province of China (2019-ZD-0509), the Project of Education Department of Liaoning Province of China (LJKZ1010, LQ2019004), the Key Research and Development Plan of Liaoning Science and Technology Department [2020JH2/10200007].
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Wang, G., Xing, Z., Zhang, X. et al. Thermodynamic, excess Properties and Intermolecular interactions of ionic liquid 1- Ethyl-3-Methylimidazolium thiocyanate and propylene carbonate mixtures. J Solution Chem 51, 594–608 (2022). https://doi.org/10.1007/s10953-022-01154-2
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DOI: https://doi.org/10.1007/s10953-022-01154-2