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Chromatographic characteristics of poly(1‐vinylimidazole)‐grafted silica in normal‐phase HPLC
Author(s) -
Sun Min,
Feng Juanjuan,
Liu Shujuan,
Wang Xusheng,
Liu Xia,
Jiang Shengxiang
Publication year - 2011
Publication title -
journal of separation science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.72
H-Index - 102
eISSN - 1615-9314
pISSN - 1615-9306
DOI - 10.1002/jssc.201000895
Subject(s) - chemistry , phase (matter) , high performance liquid chromatography , infrared spectroscopy , hydrogen bond , phenols , chromatography , polar , chemical polarity , silica gel , analytical chemistry (journal) , organic chemistry , molecule , physics , astronomy
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.