title: Imidazolium-embedded iodoacetamide-functionalized silica-based stationary phase for hydrophilic interaction/reversed-phase mixed-mode chromatography.
abstract: A novel imidazolium-embedded iodoacetamide-functionalized silica-based stationary phase has been prepared by surface radical chain-transfer polymerization. The stationary phase was characterized by Fourier transform infrared spectrometry, thermogravimetric analysis, and element analysis. Fast and efficient separations of polar analytes, such as nucleosides and nucleic acid bases, water-soluble vitamins and saponins, were well achieved in hydrophilic interaction chromatography mode. Additionally, a mixed mode of hydrophilic interaction and reversed-phase could be also obtained in the analysis of polar and nonpolar compounds, including weak acidic phenols, basic anilines and positional isomers, with high resolution and molecular-planarity selectivity, outperforming the commercially available amino column. Moreover, simultaneous separation of polar and nonpolar compounds was also achieved. In conclusion, the multimodal retention capabilities of the imidazolium-embedded iodoacetamide-functionalized silica-based column could offer a wide range of retention behavior and flexible selectivity toward hydrophilic and hydrophobic compounds.
authors.affiliation: Electrical and Information Engineering Department of Hebei Jiaotong Vocational & Technical College, Shijiazhuang, China.
authors.forename: Huizhen
authors.initials: H
authors.lastname: Wang
authors.affiliation: Key Laboratory of Medicinal Chemistry and Molecular Diagnosis, Ministry of Education, College of Pharmaceutical Sciences, Hebei University, Baoding, China.
authors.forename: Lu
authors.initials: L
authors.lastname: Zhang
authors.affiliation: Key Laboratory of Medicinal Chemistry and Molecular Diagnosis, Ministry of Education, College of Pharmaceutical Sciences, Hebei University, Baoding, China.
authors.forename: Teng
authors.initials: T
authors.lastname: Ma
authors.affiliation: Liaoning Provincial Key Laboratory for Proteomics, Dalian Medical University, Dalian, China. zhiani@126.com.
authors.forename: Liyuan
authors.initials: L
authors.lastname: Zhang
authors.affiliation: Key Laboratory of Medicinal Chemistry and Molecular Diagnosis, Ministry of Education, College of Pharmaceutical Sciences, Hebei University, Baoding, China.
authors.forename: Xiaoqiang
authors.initials: X
authors.lastname: Qiao
keywords: Hydrophilic interaction liquid chromatography; Mixed-mode chromatography; Reversed-phase liquid chromatography; Stationary phases