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Effect of stationary phase polarity on the retention of ionic liquid cations in reversed phase liquid chromatography
Author(s) -
Kowalska Sylwia,
Buszewski Boguslaw
Publication year - 2006
Publication title -
journal of separation science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.72
H-Index - 102
eISSN - 1615-9314
pISSN - 1615-9306
DOI - 10.1002/jssc.200600200
Subject(s) - ionic liquid , chemistry , ionic bonding , polarity (international relations) , phase (matter) , stationary phase , chromatography , reversed phase chromatography , ion , organic chemistry , catalysis , biochemistry , cell
Chromatographic analysis of ionic liquids on different types of packings offers interesting possibility to determine their retention mechanism. As a consequence, the major interactions between stationary phase ligands and analyzed chemical entities can be defined. The main aim of this work was to analyze cations of ionic liquids on chemically bonded stationary phases with specific structural properties. The attempt to predict the main interactions between positive ions of ionic liquids and stationary phase ligands was undertaken. For that purpose, butyl, octyl, octadecyl, phenyl, aryl, mixed, alkylamide, and cholesterolic packings were chosen and applied to the analysis of six most commonly used ionic liquids' cations. Obtained results indicate mainly dispersive and π–π type of interaction part in the retention mechanism of analyzed compounds.