Analysis of Equilibrium Electrocapillary Curves at the Interface between Hydrophobic Ionic Liquid, Trioctylmethylammonium Bis(nonafluorobutanesulfonyl)amide, and Aqueous Lithium Chloride Solutions

作者：Yasui Yukinori; Kitazumi Yuki; Nishi Naoya; Kakiuchi Takashi^*

来源：Journal of Chemical and Engineering Data, 2010, 55(10): 4463-4466.

DOI：10.1021/jc100607w

Electrocapillary curves obtained under the thermodynamic equilibrium at the interface between trioctylmethylammonium bis(nonalluorobutanesulfonyl)amide and aqueous lithium chloride have been analyzed to study the adsorption of Li(+) and Cl(-) ions at the interface. The specific adsorption of Li(+) and Cl(-) is negligible in almost the entire range of the polarized potential At the positive extreme where the excess surface charge density is greater than 3 mu C center dot cm(-2), the deviation of the experimental relative surface excesses of Li(+) and Cl(-) from the Gouy's theory was detected. This deviation suggests the coordination of adsorbed bis(nonafluorobutanesulfonyl)amide to Li(+) in the aqueous side of the interface. The double layer capacitance on the ionic liquid side of the interface is deduced to he 125 mu F center dot cm(2) at the potential of zero chortle.

• 出版日期2010-10