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N. V. Shvedene, V. V. Sviridov, N. K. Zaitsev, M. V. Roslova, I. V. Pletnev
Study of
ionic liquids by the method of voltammetry at the interface between two
immiscible electrolytes
Abstract
Ionic
liquids have been studied as organic phase in the method of voltammetry between
two immiscible electrolytes. Polarization of the interface between ionic liquid
and water was studied; the dependence of the polarization range ("potential
window") on the ionic liquid solubility in water was shown. It was established,
that interface between H2O and ionic liquid based on hydrophobic
substituted phosphonium cation and tris(pentafluoroethil)-trifluorophosphate
anion is polarizable in a range of potential about 500 mv, that gives the
chance to determine concentration of some anions, in particular perchlorate and
nitrate even at joint presence and also to measure solubility in water of the
more hydrophilic ionic liquids.
Key words: ionic
liquids, polarization of the interface between two immiscible electrolytes,
polarization, solubility in water.
Copyright (C) Chemistry Dept., Moscow State University, 2002
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