Room temperature ionic liquids surface tension

Kilaru P K, Condemarin P A, Scovazzo P. Correlations of low-pressure carbon dioxide and hydrocarbon solubilities in imidazolium-, phospho-nium-, and ammonium-based room-temperature ionic liquids. Part 1. Using surface tension. Iml. Eng. Chem. Res. 2008. 47, 900-909. 

Santos, C.S. and Baldelli, S. (2008) Gas-liquid interface of hydrophobic and hydrophilic room-temperature ionic liquids and benzene sum frequency generation and surface tension studies. 

J. Phys. Chem. C, 112, 11459-11467. Santos, C.S. and Baldelli, S. (2009) Alkyl chain interaction at the surface of room temperature ionic liquids systematic variation of alkyl chain length (R ) Cl-C4, C8) in both cation and anion of [rmim][r-oso3] by sum frequency generation and surface tension. J. Phys. Chem. B, 113, 923-933. 

On the arrangement of ions in imidazolium-based room temperature ionic liquids at the gas-liquid interface, using sum frequency generation, surface potential, and surface tension... 

The cationic fluorinated surfactant, FC-4, unlike other surfactants, forms micelles in the room temperature ionic liquid, l-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide (bmimTf2N). Surface tension, freeze-fracture TEM, F NMR, H NMR, and FTIR measurements revealed that the FC-4 cation forms an ion pair with the Tf2N anion, the ion pairs undergo association to form premicellar aggregates, and the premicellar aggregates transform into micelles at the CMC. Reverse micelles are... 

Kilaru P, Baker GA, Scovazzo P (2007) Density surface tension measurements of imidazolium-, quaternary phosphonium-, and ammonium-based room-temperature ionic liquids data and correlations. J Chem Eng Data 52 2306-2314... 

Sanchez LG, Espel JR, Onink F, Meindersma GW, de Haan AB (2009) Density, viscosity, and surface tension of synthesis grade imidazolium, pyridinium, and pyrrolidinium based room temperature ionic liquids. J Chem Eng Data 54 2803-2812... 

Weiss VC, Heggen B, Muller-Plathe F (2010) Critical parameters and surface tension of the room temperature ionic liquid [bmim][PF6] a corresponding-states analysis of experimental and new simulation data. J Phys Chem C 114 3599-3608... 

The densities of ionic liquids are also affected by the choice of the cation and anion. For imidazolium ionic liquids the density decreases slightly as the alkyl chain of the cation increases in length. In addition, the absoption of water by ionic liquids by increasing nitric acid concentration can also cause a decrease in the density (Giridhar et al. 2004). Regarding imidazolium-based ionic liquids, by increasing the alkyl chain it was found that the surface tension decreased due to the orientation of hydrocarbon tails on the surface (Kilaru et al. 2007). The vapour pressure of an ionic liquid is usually unmeasurable at room temperature. Studies on the thermal stability of ionic liquids showed that the type of the associated anion has the primary effect on the thermal stability of the ionic liquids (Holbrey and Seddon... 

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