1.Poly(1-allylimidazole)-grafted silica, a new specific stationary phase for reversed-phase and anion-exchange liquid chromatography.
Sun M1, Qiu H, Wang L, Liu X, Jiang S. J Chromatogr A. 2009 May 1;1216(18):3904-9. doi: 10.1016/j.chroma.2009.02.089. Epub 2009 Mar 5.
A new specific stationary phase based on poly(1-allylimidazole)-grafted silica has been synthesized and characterized, by infrared spectra, elemental analysis, thermogravimetric analysis and X-ray photoelectron spectroscopy. The results of test showed that poly(1-allylimidazole) can effectively mask the residual silanol groups and reduce the adverse effect of residual silanol. Using this stationary phase, phenol compounds, aniline compounds, and polycyclic aromatic hydrocarbons were successfully separated with symmetric peak shapes in the reversed-phase chromatography. Inorganic anions (IO(3)(-), BrO(3)(-), Br(-), NO(3)(-), I(-), SCN(-)) were also separated completely in the anion-exchange chromatography using sodium chloride solution as the mobile phase. The effects of pH and the concentration of eluent on the separation of inorganic anions were studied. The separation mechanism appears to involve the mixed interactions of hydrogen bonding, hydrophobic, pi-pi, electrostatic, and anion-exchange interactions.
2.Highly ion-conducting poly(ionic liquid) layers.
Wood TJ1, Schofield WC, Lund P, Larsen MJ, Badyal JP. Chem Commun (Camb). 2012 Oct 21;48(82):10201-3.
Highly ion-conducting poly(ionic liquid) thin films have been prepared in the absence of solvents utilizing a simple 2-step approach comprising pulsed plasmachemical deposition of 1-allylimidazole followed by vapour-phase quaternization with 1-bromobutane.
