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Citation: WANG Jie, LIU Hong, WU Dan, ZHAO Bihong, SHEN Jiwei, WANG Chaozhan, WEI Yinmao. Preparation and chromatographic properties of mixed-mode chromatographic stationary phases modified by imidazole side-group functionalized poly(ionic liquids)[J]. Chinese Journal of Chromatography, ;2020, 38(4): 424-429. doi: 10.3724/SP.J.1123.2019.07029 shu

Preparation and chromatographic properties of mixed-mode chromatographic stationary phases modified by imidazole side-group functionalized poly(ionic liquids)

WANG Jie ¹ ,
LIU Hong ² ,
WU Dan ³ ,
ZHAO Bihong ¹ ,
SHEN Jiwei ¹ ,
WANG Chaozhan ¹ ,
WEI Yinmao ^1,,

1.
College of Chemistry and Materials Science, Northwest University, Xi'an 710127, China;
2.
Shaanxi Huabang Testing Co. Ltd., Xi'an 710018, China;
3.
Sunresin New Materials Co. Ltd., Xi'an 710076, China

Corresponding author: WEI Yinmao, ymwei@nwu.edu.cn
Received Date: 26 July 2019

Fund Project: National Natural Science Foundation of China (No. 21775121).

A novel mixed-mode chromatographic stationary phase was prepared via surface initiated atom transfer radical polymerization using an imidazole side-group functionalized ionic liquid monomer, 1-(4-vinylbenzyl)-3-cyanomethyl bromide. The structure of the stationary phase was characterized by infrared spectroscopy, elemental analysis, and thermogravimetric analysis. The stationary phase showed good separation ability. The retention mechanism of reversed-phase/ion exchange toward solutes on the stationary phase was verified by determining the effect of mobile phase pH on the retention of substances. Compared with octadecylsilyl-bonded silica stationary phase, it is confirmed that the poly(ionic liquid)-modified stationary phase provides π-π interaction toward the retention of the solutes. The results show that the functionalization of imidazole side groups is a feasible method for preparing new ionic liquid stationary phases.
- atomic transfer radical polymerization (ATRP),
- poly(ionic liquids) (PILs),
- stationary phase,
- mixed-mode chromatography
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