Authors: BİROL IŞIK, FATİH ÇAKAR, HÜSNÜ CANKURTARAN, ÖZLEM CANKURTARAN
Abstract: The selectivity of 4-(Decyloxy) benzoic acid (DBA) liquid crystal in surface adsorption region (303.2-328.2 K) and thermodynamic region (423.2 - 433.2 K) was investigated by inverse gas chromatography at infinite dilution (IGC-ID). The selectivity parameters of the structural isomer series named butyl acetate, butyl alcohol, and amyl alcohol series were calculated for the DBA using IGC-ID technique. Additionally, the surface properties including dispersive surface energy (γ SD), free energy (ΔGAS), enthalpy (ΔHAS), and acidity-basicity constants were calculated with net retention volumes obtained from IGC-ID experiment results. When the ΔHAS and ΔGAS are constants, DBA surface was found to be an acidic character (KD/KA ≅ 0.89).
Keywords: Inverse gas chromatography, liquid crystal, selectivity, surface properties
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