Retention characteristics of a new butylimidazolium-based stationary phase. Part II: anion exchange and partitioning |
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| Authors: | David S Van Meter Yaqin Sun Kevin M Parker Apryll M Stalcup |
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| Institution: | (1) Department of Chemistry, University of Cincinnati, Cincinnati, OH 45221, USA |
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| Abstract: | A surface-confined ionic liquid (SCIL) and a commercial quaternary amine silica-based stationary phase were characterized
employing the linear solvation energy relationship (LSER) method in binary methanol/water mobile phases. The retention properties
of the stationary phases were evaluated in terms of intermolecular interactions between 28 test solutes and the stationary
phases. The comparison reveals a difference in the hydrophobic and hydrogen bond acceptance interaction properties between
the two phases. The anion exchange retention mechanism of the SCIL phase was demonstrated using nucleotides. The utility of
the SCIL phase in predicting logk
IL/water values by chromatographic methods is also discussed. |
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| Keywords: | Butylimidazolium bromide LSER Ion exchange HPLC RP-HPLC Ionic liquid Retention mechanisms |
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