Summary
Two crown ethers, di(tert-butylbenzo)-propyl-15-crown-5 polysiloxane (PSO-DTB-15C5) and dibenzo-propyl-15-crown-5 polysiloxane (PSO-DB-15C5) have been synthesized and coated onto fused-silica capillary columns. The chromatographic characteristics, including column efficiency, polarity, phase transition temperature, operating temperature range and selectivity, were studied.
Excellent selectivity was obtained for the separation of polar position isomers, especially phenol and dinitrotoluene isomers. The separation mechanism is discussed.
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Wu, C.Y., Cai, L.S., Wang, Y.J. et al. Preparation and gas chromatographic characterization of dibenzyl crown ether stationary phases. Chromatographia 37, 374–380 (1993). https://doi.org/10.1007/BF02272251
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DOI: https://doi.org/10.1007/BF02272251