Evaluation of thermophysical properties of ionic liquids with polar solvent: A comparable study of two families of ionic liquids with various ions

Varadhi Govinda, Pankaj Attri, Punnuru Venkatesu, Ponneri Venkateswarlu

研究成果: ジャーナルへの寄稿学術誌査読

44 被引用数 (Scopus)

抄録

In this work, we explore and compare the role of the ion effect on the thermophysical properties of two families of ionic liquids (ILs), namely, tetra-alkyl ammonium cation [R4N]+ with hydroxide [OH]- anion and 1-alkyl-3-methyl imidazolium cation [amim] + with different anions (chloride, methyl sulfate, and tetrafluoroborate), with polar solvent such as dimethylsulfoxide (DMSO) in the temperature range from 25 to 40 C and over the whole concentration range of ILs. Two families of ILs, namely, tetramethyl ammonium hydroxide [(CH 3)4N][OH] (TMAH), tetraethyl ammonium hydroxide [(C 2H5)4N][OH] (TEAH), tetrapropyl ammonium hydroxide [(C3H7)4N][OH] (TPAH), and tetrabutyl ammonium hydroxide [(C4H9)4N][OH] (TBAH) from ammonium-based ILs and 1-ethyl-3-methylimidazolium chloride [Emim][Cl], 1-ethyl-3-methylimidazolium methylsulfate [Emim][MeSO4], 1-butyl-3-methylimidazolium tetrafluoroborate [Bmim][BF4], and 1-butyl-3-methylimidazolium chloride ([Bmim][Cl]) from imidazolium family of ILs, are used in the present study. To address the molecular interactions of ILs with DMSO, densities (ρ), ultrasonic sound velocities (u), and viscosities (η) have been measured over the entire composition range and at four temperatures, 25, 30, 35, and 40 C, under atmospheric pressure. From these experimental data, the excess molar volume (VE), the deviation in isentropic compressibility (Δκs), and the deviation in viscosity (Δη) were calculated and were adequately correlated by using the Redlich-Kister polynomial equation. The measured and predicted data were interpreted on the basis of intermolecular interactions and structural effects between like and unlike molecules upon mixing. The hydrogen-bonding features between ammonium-based ILs and DMSO were analyzed using molecular modeling program by HyperChem 7.

本文言語英語
ページ(範囲)12535-12548
ページ数14
ジャーナルJournal of Physical Chemistry B
117
41
DOI
出版ステータス出版済み - 10月 17 2013
外部発表はい

!!!All Science Journal Classification (ASJC) codes

  • 物理化学および理論化学
  • 表面、皮膜および薄膜
  • 材料化学

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