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.
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.