An ionic liquid bonded polysiloxane(PSOIL) was prepared through the reaction between 1-methylimidazole and γ-chloropropyl-polysiloxane and used as gas chromatography stationary phase for the first time. The column ef...An ionic liquid bonded polysiloxane(PSOIL) was prepared through the reaction between 1-methylimidazole and γ-chloropropyl-polysiloxane and used as gas chromatography stationary phase for the first time. The column efficiency was 3200 plates/m after being conditioned at 210 ℃. Grob reagent,aromatic isomers and homologous series were employed to evaluate the selectivity of the column. The results demonstrate that the PIL stationary phase exerted good selectivity and high separation efficiency.展开更多
A new ionic liquid-based high-performance liquid chromatography stationary phase is reported.A derivative of N-methyl pyrrolidinium tetrafluoroborate was covalently immobilized on the surface of silica particles to pr...A new ionic liquid-based high-performance liquid chromatography stationary phase is reported.A derivative of N-methyl pyrrolidinium tetrafluoroborate was covalently immobilized on the surface of silica particles to prepare silica-based N-methyl pyrrolidinium tetrafluoroborate(SilprMP BF4)stationary phase.The obtained ionic liquid-modified silica was evaluated and confirmed by elemental analysis,infrared spectroscopy,and thermogravimetric analysis.A column was packed with the modified particles.The retention behavior of aromatic compounds,alkyl benzenes,and acidic and basic compounds on the SilprMP BF4 stationary phase was studied under reversed-phase liquid chromatography conditions.The effect of the eluent pH on the separation of the acidic and basic compounds was also studied.The new stationary phase involves multiple retention mechanisms,such as electrostatic,hydrophobic,ion-dipole,and anion-exchange interactions,which might lead to multipurpose separation media.展开更多
文摘An ionic liquid bonded polysiloxane(PSOIL) was prepared through the reaction between 1-methylimidazole and γ-chloropropyl-polysiloxane and used as gas chromatography stationary phase for the first time. The column efficiency was 3200 plates/m after being conditioned at 210 ℃. Grob reagent,aromatic isomers and homologous series were employed to evaluate the selectivity of the column. The results demonstrate that the PIL stationary phase exerted good selectivity and high separation efficiency.
文摘A new ionic liquid-based high-performance liquid chromatography stationary phase is reported.A derivative of N-methyl pyrrolidinium tetrafluoroborate was covalently immobilized on the surface of silica particles to prepare silica-based N-methyl pyrrolidinium tetrafluoroborate(SilprMP BF4)stationary phase.The obtained ionic liquid-modified silica was evaluated and confirmed by elemental analysis,infrared spectroscopy,and thermogravimetric analysis.A column was packed with the modified particles.The retention behavior of aromatic compounds,alkyl benzenes,and acidic and basic compounds on the SilprMP BF4 stationary phase was studied under reversed-phase liquid chromatography conditions.The effect of the eluent pH on the separation of the acidic and basic compounds was also studied.The new stationary phase involves multiple retention mechanisms,such as electrostatic,hydrophobic,ion-dipole,and anion-exchange interactions,which might lead to multipurpose separation media.
