期刊
JOURNAL OF SEPARATION SCIENCE
卷 43, 期 14, 页码 2766-2772出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/jssc.202000189
关键词
mixed-mode chromatography; poly(ionic liquids); selectivity; stationary phases
资金
- National Natural Science Foundation of China [21974106, 21775121]
- Key Research and Development Program of Shaanxi Province [2019GY-161]
Poly(ionic liquid)-modified stationary phases can have multiple interactions with solutes. However, in most stationary phases, separation selectivity is adjusted by changing the poly(ionic liquid) anions. In this work, two poly(ionic liquid)-modified silica stationary phases were prepared by introducing the cyano or tetrazolyl group on the pendant imidazolium cation on the polymer chains. Various analytes were selected to investigate their mechanism of retention in the stationary phases using different mobile phases. Two poly(ionic liquid)-modified stationary phases can provide various interactions toward solutes. Compared to the cyano-functionalized poly(ionic liquid) stationary phase, the tetrazolyl-functionalized poly(ionic liquid) stationary phase provides additional cation-exchange and pi-pi interactions, resulting in different separation selectivity toward analytes. Finally, applicability of the developed stationary phases was demonstrated by the efficient separation of nonsteroidal anti-inflammatory drugs.
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