Retention characteristics of a new butylimidazolium-based stationary phase. Part II: anion exchange and partitioning.
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.
Department of Chemistry, University of Cincinnati, Cincinnati, OH 45221, USA.
David S
DS
Van Meter
Yaqin
Y
Sun
Kevin M
KM
Parker
Apryll M
AM
Stalcup
D000838:Anions; D002623:Chemistry Techniques, Analytical / Q000379:methods*; D002851:Chromatography, High Pressure Liquid / Q000379:methods; D002852:Chromatography, Ion Exchange / Q000379:methods; D006841:Hydrocarbons, Aromatic / Q000737:chemistry; D007093:Imidazoles / Q000138:chemical synthesis / Q000737:chemistry*; D007477:Ions; D016014:Linear Models; D000432:Methanol / Q000737:chemistry; D012680:Sensitivity and Specificity; D012822:Silicon Dioxide / Q000737:chemistry; D013997:Time Factors; D014867:Water / Q000737:chemistry
D000838:Anions; D006841:Hydrocarbons, Aromatic; D007093:Imidazoles; D007477:Ions; C514468:n-butylimidazolium bromide; D014867:Water; D012822:Silicon Dioxide; D000432:Methanol