title: Dipyridine modified silica--a novel multi-interaction stationary phase for high performance liquid chromatography.
abstract: A novel multi-interaction stationary phase based on 4,4'-dipyridine modified silica was synthesized and characterized, by infrared spectra, X-ray photoelectron spectroscopy and elemental analysis. Mechanism involved in the chromatographic separation is the multi-interaction including π-π, hydrophobic, hydrogen-bonding, electrostatic and anion-exchange interactions. Based on these interactions, polycyclic aromatic hydrocarbons and phenols were successfully separated respectively in reversed-phase chromatography; inorganic and organic anions were also separated individually in anion-exchange chromatography by using the same column. Furthermore, the simultaneous separation of neutral organics, inorganic and organic anions was obtained on this stationary phase with the appropriate mobile phase. Therefore, such stationary phase has the characteristics of multi-interaction mechanism and multi-modal separation, and has potential application on complex samples.
authors.affiliation: 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, China.
authors.forename: Min
authors.initials: M
authors.lastname: Sun
authors.forename: Juanjuan
authors.initials: J
authors.lastname: Feng
authors.forename: Shujuan
authors.initials: S
authors.lastname: Liu
authors.forename: Chunming
authors.initials: C
authors.lastname: Xiong
authors.forename: Xia
authors.initials: X
authors.lastname: Liu
authors.forename: Shengxiang
authors.initials: S
authors.lastname: Jiang
mesh_terms: D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D006863:Hydrogen-Ion Concentration; D000432:Methanol / Q000737:chemistry; D010636:Phenols / Q000032:analysis / Q000302:isolation & purification; D011084:Polycyclic Aromatic Hydrocarbons / Q000032:analysis / Q000302:isolation & purification; D011189:Potassium Chloride / Q000737:chemistry; D011725:Pyridines / Q000737:chemistry*; D012822:Silicon Dioxide / Q000737:chemistry*
chemical_list: D010636:Phenols; D011084:Polycyclic Aromatic Hydrocarbons; D011725:Pyridines; D011189:Potassium Chloride; D012822:Silicon Dioxide; D000432:Methanol