NOVEL BI-FUNCTIONAL AMINO-IMIDAZOLIUM SILICA CONFINED STATIONARY PHASE FOR LIQUID CHROMATOGRAPHY

Abstract

A novel amino-imidazolium stationary phase based on silica was synthesized and characterized in this paper. The material with ionic and NH₂ exhibited an exciting capacity of separation for liquid chromatography. A number of aromatic compounds were successfully separated by the material as the stationary phase. Resolutions and adsorption isotherms of these organic compounds were examined. Furthermore, the novel stationary phase showed a potential ability to separate biocompounds, such as alkaloids and tanshinones. The protonation of amino group was also investigated.

Keywords:

• amino-imidazolium stationary phase
• aromatic compounds
• biocompounds
• ionic liquid
• liquid chromatography
• separation

ACKNOWLEDGMENTS

This research was supported by Basic Science Research Program through the National Research Foundation (NRF) of Korea funded by the Ministry of Education, Science and Technology (2010-0015731).

Notes

^a R ₁ is the resolution (R) of aniline and phenol.

^b R ₂ is the resolution (R) of phenol and toluene.

^c R ₃ is the resolution (R) of toluene and chlorobenzene.