Calixarene ionic liquid modified silica gel: A novel stationary phase for mixed-mode chromatography

Hu, Kai; Zhang, Wenfen; Yang, Huaixia; Cui, Yongxia; Zhang, Jingya; Zhao, Wenjie; Yu, Ajuan; Zhang, Shusheng

doi:10.1016/j.talanta.2016.02.038

Cited by 61 publications

(26 citation statements)

References 47 publications

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“…Mixed-mode chromatography (MMC), is a type of chromatography in which the stationary phase interacts with solutes through more than one interaction mode, can offer more selectivities for simultaneous separation of diverse compounds [1,2]. Through MMC, one mixed-mode column can be used to replace two or more single-mode columns, avoiding the consumption of stationary phase materials [3].…”

Section: Introductionmentioning

confidence: 99%

Preparation and evaluation of 2-methylimidazolium-functionalized silica as a mixed-mode stationary phase for hydrophilic interaction and anion-exchange chromatography

Yang

Liu

Chen

et al. 2016

Journal of Chromatography A

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Section: Introductionmentioning

confidence: 99%

Preparation and evaluation of 2-methylimidazolium-functionalized silica as a mixed-mode stationary phase for hydrophilic interaction and anion-exchange chromatography

Yang

Liu

Chen

et al. 2016

Journal of Chromatography A

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“…The overwhelming majority of studies are devoted to the use of imidazolium IL in synthesis stationary phases for HPLC and GC . There are different types of stationary phases based on IL: immobilized via their cationic or anionic portions, conventional zwitterionic materials and comprising zwitterionic materials co‐immobilized via anions and cations .…”

Section: Introductionmentioning

confidence: 99%

Multifunction covalent coatings for separation of amino acids, biogenic amines, steroid hormones, and ketoprofen enantiomers by capillary electrophoresis and capillary electrochromatography

Кравченко

Колобова

Карцова

2020

Separation Science Plus

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In this study, the preparation process of multifunctional coating based on imidazole and β-cyclodextrin has been developed. The synthesis includes several steps: activation of fused silica capillary walls via alkali, then process of silylation and finally functionalization with imidazole and β-cyclodextrin derivative. The latter step was carried over 22 h at 100 • C at 750 mg/mL concentration of p-toluenesulfonyl-β-cyclodextrin.It was established that the coatings thus obtained are stable within pH 2-7 range but decompose in alkaline medium. The stationary phase developed in this study allows simultaneous separation of hydrophobic and hydrophilic analytes. Chiral separation of ketoprofen enantiomers was also achieved with the newly developed covalent coating.It was found that covalent coating based on imidazole and β-cyclodextrin exceeded the dynamic coatings of similar structure in terms of repeatability, analysis time and the limits of detection.

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“…ILs can be divided into imidazolium ILs, pyridinium ILs, pyrrolidinium ILs, morpholinium ILs, and quaternary ammonium ILs depending on the chemical structure of the ionic liquid cations. Because they have the characteristics of nonvolatility, strong dissolving capacity, tunability, wide liquid temperature range, and environment‐friendly features, ILs have been widely used in organic synthesis, electrochemistry, analytical chemistry, environmental science, and other fields as a metal corrosion inhibitor, solvent extraction organic diluents, glass cleaners, mobile phase additives, and stationary phase. With the wide application of ILs, simple, effective, and practical analytical methods have become very important for the monitoring and detection of ILs.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Morpholinium Ionic Liquid Cations by Hydrophilic Interaction Columns Coupled with Indirect UV Detection

Fan

Guan

2018

J Chinese Chemical Soc

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A method was developed for the separation and detection of morpholinium ionic liquid cations by hydrophilic interaction column combined with indirect ultraviolet detection using imidazolium ionic liquids as ultraviolet absorbents in high-performance liquid chromatography. The effects of the ultraviolet absorbents, organic solvents, and the pH value of the aqueous solution in the mobile phase for the determination of morpholinium cations were investigated by using a hydrophilic column with carbamoyl group as the analytical column. The retention and detection behavior of morpholinium cations was discussed. The suitable chromatographic conditions were 0.8 mmol/L 1-ethyl-3-methyl-imidazolium tetrafluoroborate aqueous solution (pH 3.5 adjusted with acetic acid)/acetonitrile (45/55, v/v) as the mobile phase and a detection wavelength of 210 nm. Under these conditions, the baseline separation of N-methyl-N-ethyl-morpholinium cation ([MEMo] + ) and N-methyl-N-propyl-morpholinium cation ([MPMo] + ) was successfully achieved in 15 min. The detection limits of [MEMo] + and [MPMo] + were 0.595 and 0.531 mg/L, respectively. Relative standard deviations were less than 0.2%. This method has been successfully applied to the analysis of morpholinium ionic liquid samples synthesized in chemical laboratories, which is simple, reliable, and practical.

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Calixarene ionic liquid modified silica gel: A novel stationary phase for mixed-mode chromatography

Cited by 61 publications

References 47 publications

Preparation and evaluation of 2-methylimidazolium-functionalized silica as a mixed-mode stationary phase for hydrophilic interaction and anion-exchange chromatography

Preparation and evaluation of 2-methylimidazolium-functionalized silica as a mixed-mode stationary phase for hydrophilic interaction and anion-exchange chromatography

Multifunction covalent coatings for separation of amino acids, biogenic amines, steroid hormones, and ketoprofen enantiomers by capillary electrophoresis and capillary electrochromatography

Analysis of Morpholinium Ionic Liquid Cations by Hydrophilic Interaction Columns Coupled with Indirect UV Detection

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