Summary
Two commercially available liquid crystals, 4-cyano-4′-n-pentyl-1,1′-bipheny and 4-cyano-4′-n-pentoxy-1,1′-bipheny, are bonded to a silica hydride surface via hydrosilation in the presence of a free radical iniator, t-butyl peroxide. Elemental analysis, diffuse reflectance Fourier trans-form infrared spectroscopy, and13C and29Si CP-MAS NMR spectroscopy are used to confirm the success of the bonding reaction. The13C CP-MAS spectra suggest a difference in the bonded phase morphology of the two materials. Static hydrolytic stability tests indicate these materials do not degrade significantly in both acidic and basic solutions. Chromatographic tests confirm that these two bonded phase behave differently with respect to their retention of PAHs, alkyl-substituted benzenes and benzodiazepines.
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Pesek, J.J., Matyska, M.T. & Muley, S. Synthesis and characterization of a new type of chemically bonded liquid crystal stationary phase for HPLC. Chromatographia 52, 439–444 (2000). https://doi.org/10.1007/BF02535716
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DOI: https://doi.org/10.1007/BF02535716