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Thermophysical properties of 1-hexyl-3-methyl imidazolium based ionic liquids with tetrafluoroborate, hexafluorophosphate and bis(trifluoromethylsulfonyl)imide anions

A., Muhammad and M.I., Abdul Mutalib and C.D., Wilfred and T., Murugesan and A., Shafeeq (2008) Thermophysical properties of 1-hexyl-3-methyl imidazolium based ionic liquids with tetrafluoroborate, hexafluorophosphate and bis(trifluoromethylsulfonyl)imide anions. [Citation Index Journal]

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Abstract

The thermophysical properties of 1-hexyl-3-methyl imidazolium based hydrophobic room temperature ionic liquids (RTILs); with tetrafluoroborate (BF4), hexafluorophosphate (PF6), and bis(trifluoromethylsulfonyl)imide (Tf2N) anions, namely density ρ (298.15 to 348.15) K, dynamic viscosity η (288.2 to 348.2) K, surface tension σ (298.15 to 338) K, and refractive index nD (302.95 to 332.95) K have been measured. The coefficients of thermal expansion αp values were calculated from the experimental density data using an empirical correlation. The thermal stability of all ILs is also investigated at two different heating rates (10 and 20) °C · min-1) using thermogravimetric analyzer (TGA). The experimental results presented in this study reveal that the choice of anion type shows the most significant effect on the properties of ILs. The chloride and water contents of ILs (as impurities) are also investigated and reported in the present work. © 2008 Elsevier Ltd. All rights reserved.

Item Type:Citation Index Journal
Uncontrolled Keywords:Ionization of liquids; Ions; Liquids; Thermodynamic properties; Bis imide; Hexafluoro phosphate; Imidazolium; Imidazolium based ionic liquids; Physical properties; Room-temperature ionic liquids; Tetrafluoroborate; Thermal expansion; Thermal stability; Ionic liquids
Subjects:T Technology > TP Chemical technology
Departments / MOR / COE:Departments > Chemical Engineering
ID Code:600
Deposited By: Prof Dr Thanabalan Murugesan
Deposited On:09 Mar 2010 03:01
Last Modified:19 Jan 2017 08:26

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