Abstract
Two bonded nematic liquid crystal stationary phases for use in high-performance liquid chromatography were prepared by reacting the silanized forms of [4-(allyloxy)benzoyl]biphenyl and 4-{[4-(allyloxy)-benzoyl]oxyl}-4′-methoxybiphenyl with the surface of silica. The diffuse reflectance infrared Fourier transform and carbon-13 cross-polarization magic angle spinning NMR spectra of the two bonded phases confirmed that the reaction was successful. Carbon elemental analysis indicated a high loading of the liquid crystal on the surface. Van 't Hoff plots using polyaromatic hydrocarbons as the solutes in an acetonitrile—water mobile phase indicated that phase transitions are occurring. The relative retention of anthracene and phenanthrene as a function of temperature is also sensitive to changes in the stationary phase morphology and reveals that more than a single transition is occurring over the temperature range studied.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
