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Comparison of Solution Behaviors of Two Structurally Related Ionic Liquids in Water and in Acetonitrile as Studied by Volumetric and Acoustic Properties
Journal of Solution Chemistry ( IF 1.2 ) Pub Date : 2019-11-20 , DOI: 10.1007/s10953-019-00931-w
Elif Merve Sahin , Erol Ayranci

Interactions of 1-butyl-1-methylpyrrolidinium tetrafluoroborate (BMPYBF4) and 1-butyl-1-methylpiperidinium tetrafluoroborate (BMPIBF4) with water and acetonitrile (AN) were studied in a comparative manner through the measurements of density and speed of sound at 288.15, 293.15, 298.15, 303.15 and 308.15 K. The measured densities and speeds of sound were used in calculation of apparent molar volumes and apparent molar isentropic compressions of the two ionic liquids (ILs) in water and in AN. Infinite dilution values of the two apparent molar quantities were obtained by extrapolation. Then, these properties were evaluated in terms of IL–water and IL–AN interactions. The effect of presence of an additional cyclic –CH2– group in the structure of BMPIBF4, compared to that of BMPYBF4, on the volumetric and acoustic properties has been examined both in water and in AN. The effect of solvent, H2O or AN, on the solution behaviors of the two ILs is discussed, based on transfer apparent molar volumes and transfer apparent molar isentropic compressions from H2O to AN. Apparent molar isobaric expansions at infinite dilutions were determined. Temperature effects on solution behaviors of the two ILs in H2O and in AN are discussed based on variation of apparent molar properties at infinite dilution with temperature.

中文翻译:

通过体积和声学特性研究的两种结构相关的离子液体在水和乙腈中的溶液行为比较

1-丁基-1-甲基吡咯烷鎓四氟硼酸盐 (BMPYBF4) 和 1-丁基-1-甲基哌啶鎓四氟硼酸盐 (BMPIBF4) 与水和乙腈 (AN) 的相互作用通过测量 288.15 的密度和声速以比较的方式进行研究, 293.15、298.15、303.15 和 308.15 K。测量的密度和声速用于计算两种离子液体 (IL) 在水中和 AN 中的表观摩尔体积和表观摩尔等熵压缩。两个表观摩尔量的无限稀释值是通过外推法获得的。然后,根据 IL-水和 IL-AN 相互作用评估这些特性。与 BMPYBF4 相比,BMPIBF4 结构中存在额外环状 –CH2– 基团的影响,已在水中和 AN 中检查了体积和声学特性。基于转移表观摩尔体积和转移表观摩尔等熵压缩从 H2O 到 AN,讨论了溶剂、H2O 或 AN 对两种离子液体的溶液行为的影响。测定无限稀释下的表观摩尔等压膨胀。温度对两种离子液体在 H2O 和 AN 中的溶液行为的影响基于无限稀释时表观摩尔性质随温度的变化进行讨论。
更新日期:2019-11-20
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