Thermophysic Comparative Study of Two Isomeric Pyridinium-Based Ionic Liquids

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• 作者：Isabel Bandr&eacute ; s ; Beatriz Giner ; H&eacute ; ctor Artigas ; F&eacute ; lix M. Royo ; Carlos Lafuente
• 刊名：Journal of Physical Chemistry B
• 出版年：2008
• 出版时间：March 13, 2008
• 年：2008
• 卷：112
• 期：10
• 页码：3077 - 3084
• 全文大小：97K
• 年卷期：v.112,no.10(March 13, 2008)
• ISSN：1520-5207

文摘

A comprehensive thermophysical study of isomeric room-temperature ionic liquids n-butyl-3-methyl-pyridiniumtetrafluoroborate and n-butyl-4-methyl-pyridinium tetrafluoroborate has been performed. This paper reportsvarious experimental data including density, speed of sound, refractive index, surface tension, isobaric molarheat capacity, and kinematic viscosity. From the experimental results, coefficients of thermal expansion,dynamic viscosities and molar refractions of the studied ionic liquids have been determined. Results havebeen analyzed paying special attention to the different features of the isomers and their structural differences.Several theories and empirical relations have been applied in order to predict physical properties of ionicliquids. A good agreement between experimental and calculated data has been found. Furthermore, a studyabout the versatility and application of the different relationships has been carried out finding that in generaldensity and coefficients of thermal expansion can be estimated with relatively good accuracy.