TITLE

Retention characteristics of a new butylimidazolium-based stationary phase

AUTHOR(S)
Sun, Y.; Cabovska, B.; Evans, C. E.; Ridgway, T. H.; Stalcup, A. M.
PUB. DATE
June 2005
SOURCE
Analytical & Bioanalytical Chemistry;Jun2005, Vol. 382 Issue 3, p728
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
A new HPLC stationary phase has been synthesized based on the ionic liquidn-butylimidazolium bromide. Imidazolium was covalently immobilized on a silica substrate through ann-alkyl tether and the retention characteristics of the resulting stationary phase were evaluated systematically. Using 28 small aromatic test solutes and reversed phase conditions, the linear solvation energy relationship approach was successfully used to characterize this new phase. The retention characteristics of the test solutes show remarkable similarity with phenyl stationary phases, despite the presence of a positive charge on the new imidazolium phase. Operated in the reversed phase mode, this new stationary phase shows considerable promise for the separation of neutral solutes and points to the potential for a truly multi-modal stationary phase.
ACCESSION #
17211491

 

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