Benzimidazolium Ionic-Liquid-Functionalized Star-shaped Copolymer Stationary Phase for Capillary Gas Chromatography

摘要

In this work, a novel star-shaped copolymer functionalized by benzimidazolium ionic liquid (Star-PEG-PCL2-2Bim) was synthesized and applied as stationary phase in capillary gas chromatography (GC). After static coating, the Star-PEG-PCL2-2Bim column exhibited a column efficiency of 2655 plates/m and moderate polarity. The Star-PEG-PCL2-2Bim column showed preferential retention and high resolving capability for hydrogen-bonded and aromatic analytes, showing advantages over the ordinary polysiloxane phase. Impressively, it attained high resolution for the isomer mixtures of halogenated benzene, nitrobenzene, phenol and benzaldehydes with good peak shapes. The advantageous separation performance shows the good potential of the Star-PEG-PCL2-2Bim stationary phase for GC analysis.