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学科主题: 物理化学
题名: Study of surface-bonded dicationic ionic liquids as stationary phases for hydrophilic interaction chromatography
作者: Qiao, Lizhen1;  Li, Hua1;  Shan, Yuanhong1;  Wang, Shuangyuan1;  Shi, Xianzhe1;  Lu, Xin1;  Xu, Guowang1
通讯作者: 石先哲 ;  许国旺
关键词: Dicationic ionic liquid ;  Hydrophilic interaction chromatography ;  Stationary phase ;  Ion exchange ;  Click chemistry
刊名: JOURNAL OF CHROMATOGRAPHY A
发表日期: 2014-02-21
DOI: 10.1016/j.chroma.2014.01.020
卷: 1330, 期:1, 页:40-50
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Life Sciences & Biomedicine ;  Physical Sciences
类目[WOS]: Biochemical Research Methods ;  Chemistry, Analytical
研究领域[WOS]: Biochemistry & Molecular Biology ;  Chemistry
英文摘要: In the present study, several geminal dicationic ionic liquids based on 1,4-bis(3-allylimidazolium)butane and 1,8-bis(3-allylimidazolium)octane in combination with different anions bromide and bis(trifluoromethanesulphonyl)imide were prepared and then bonded to the surface of 3-mercaptopropyl modified silica materials through the "thiol-ene" click chemistry as stationary phases for hydrophilic interaction chromatography (HILIC). Compared with their monocationic analogues, the dicationic ionic liquids stationary phases presented effective retention and good selectivity for typical hydrophilic compounds under HILIC mode with the column efficiency as high as 130,000 plates/m. Moreover, the influence of different alkyl chain spacer between dications and combined anions on the retention behavior and selectivity of the dicationic ionic liquids stationary phases under HILIC mode was displayed. The results indicated that the longer linkage chain would decrease the hydrophilicity and retention on the dicationic ionic liquid stationary phase, and while differently combined anions had no difference due to the exchangeability under the common HILIC mobile phase with buffer salt. Finally, the retention mechanism was investigated by evaluating the effect of chromatographic factors on retention, including the water content in the mobile phase, the mobile phase pH and buffer salt concentration. The results showed that the dicationic ionic liquids stationary phases presented a mixed-mode retention behavior with HILIC mechanism and anion exchange. (C) 2014 Elsevier B.V. All rights reserved.
关键词[WOS]: REVERSED-PHASE ;  MOBILE-PHASE ;  RETENTION CHARACTERISTICS ;  POLAR COMPOUNDS ;  ANION-EXCHANGE ;  SEPARATION ;  PERFORMANCE ;  BEHAVIOR ;  SELECTIVITY ;  STABILITY
语种: 英语
WOS记录号: WOS:000331688400006
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/144486
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, Key Lab Separat Sci Analyt Chem, Dalian 116023, Peoples R China

Recommended Citation:
Qiao, Lizhen,Li, Hua,Shan, Yuanhong,et al. Study of surface-bonded dicationic ionic liquids as stationary phases for hydrophilic interaction chromatography[J]. JOURNAL OF CHROMATOGRAPHY A,2014,1330(1):40-50.
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