Sarmad Shokat, Zafarani-Moattar Mohammed Taghi, Nikjoo Dariush, Mikkola Jyri-Pekka
Technical Chemistry, Department of Chemistry, Chemical-Biological Centre, Umeå University, Umeå, Sweden.
Physical Chemistry Department, University of Tabriz, Tabriz, Iran.
Front Chem. 2020 Nov 12;8:593786. doi: 10.3389/fchem.2020.593786. eCollection 2020.
The density, sound velocity, and viscosity of 1-ethyl-3-methylimidazolium chloride [Cmim]Cl in pure water and aqueous solutions of some electrolytes such as potassium chloride, potassium carbonate, and potassium phosphate (weight fraction of salt fixed at = 0. 11) have been measured over a wide range of temperatures from 298.15 to 318.15 K. The obtained experimental data have been used to compute various volumetric, compressibility, and viscometric parameters, e.g., apparent molar properties, limiting apparent molar and transfer properties. The co-sphere overlap model was employed to describe the dominant intermolecular interactions in the ternary solutions. Additionally, the structure making/breaking nature of the [Cmim]Cl in the ternary solutions has been discussed in terms of Hepler's constant and the temperature derivative of viscosity -coefficient (/). The activation free energy of solvent and solute, activation enthalpy, and activation entropy have been calculated by the application of transition state theory. The calculated parameters have been interpreted in the sense of solvent-solute and solute-solute interactions. The Fourier transform infrared (FTIR) studies also have been done for the studied systems. Volumetric, acoustic, viscometric, and spectroscopic studies can render some evidence and help to understand the aqueous solution behavior of ionic liquids.
在298.15至318.15 K的宽温度范围内，测量了1-乙基-3-甲基咪唑氯化物[Cmim]Cl在纯水以及一些电解质（如氯化钾、碳酸钾和磷酸钾，盐的重量分数固定为0.11）的水溶液中的密度、声速和粘度。所获得的实验数据已用于计算各种体积、压缩性和粘度参数，例如表观摩尔性质、极限表观摩尔性质和转移性质。采用共球重叠模型来描述三元溶液中的主要分子间相互作用。此外，还根据赫普勒常数和粘度系数的温度导数（/）讨论了[Cmim]Cl在三元溶液中的结构形成/破坏性质。通过应用过渡态理论计算了溶剂和溶质的活化自由能、活化焓和活化熵。已从溶剂-溶质和溶质-溶质相互作用的角度对计算出的参数进行了解释。还对所研究的体系进行了傅里叶变换红外（FTIR）研究。体积、声学、粘度和光谱研究可以提供一些证据，并有助于理解离子液体的水溶液行为。
