Chromatographic characteristics of poly(1-vinylimidazole)-grafted silica in normal-phase HPLC

Authors

  • Min Sun,

    1. Key Laboratory of Chemistry of Northwest Plant Resources/Key Laboratory for Natural Medicine of Gansu Province, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, P. R. China
    2. Graduate School of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing, P. R. China
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  • Juanjuan Feng,

    1. Key Laboratory of Chemistry of Northwest Plant Resources/Key Laboratory for Natural Medicine of Gansu Province, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, P. R. China
    2. Graduate School of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing, P. R. China
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  • Shujuan Liu,

    1. Key Laboratory of Chemistry of Northwest Plant Resources/Key Laboratory for Natural Medicine of Gansu Province, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, P. R. China
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  • Xusheng Wang,

    1. Key Laboratory of Chemistry of Northwest Plant Resources/Key Laboratory for Natural Medicine of Gansu Province, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, P. R. China
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  • Xia Liu,

    Corresponding author
    1. Key Laboratory of Chemistry of Northwest Plant Resources/Key Laboratory for Natural Medicine of Gansu Province, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, P. R. China
    • Key Laboratory of Chemistry of Northwest Plant Resources/Key Laboratory for Natural Medicine of Gansu Province, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, P. R. China Fax: +86-931-8277088
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  • Shengxiang Jiang

    1. Key Laboratory of Chemistry of Northwest Plant Resources/Key Laboratory for Natural Medicine of Gansu Province, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, P. R. China
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Abstract

A stationary phase based on poly(1-vinylimidazole)-grafted silica has been prepared by the surface radical chain-transfer reaction. The stationary phase was characterized by infrared spectra, X-ray photoelectron spectroscopy and elemental analysis. Chromatographic characteristics of the stationary phase were investigated in normal-phase HPLC. The results showed that both weak polar compounds (polycyclic aromatic hydrocarbons, dialkyl phthalates) and polar compounds (anilines, phenols) could be successfully separated on this stationary phase, implying better separation performance than blank silica and conventional aminopropyl-bonded silica under the same conditions. The excellent performance can be attributed to multiple interactions between surface modifier and the analytes that might include dipole, hydrogen bonding, H-π, electrostatic and inductive interactions.

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