Determination of hydrophobic constants of aromatic compounds and their temperature effects

aromatic compounds;  hydrophobic constant;  Temperature effects

The hydrophobic constant is a lipophilic parameter of organic pollutants, which is an important quality that determines the transfer, distribution, absorption and infiltration and elimination of organic molecules in the environment, and is an important parameter for environmental science research and environmental protection evaluation. The hydrophobic constants of 6 alkylbenzenes and 7 aromatic amines in typical aromatic compounds at a temperature of 25~60 °C were determined by high performance liquid chromatography. According to the phase equilibrium theory of chemical thermodynamics, the thermodynamic relationship of hydrophobic constant with temperature was proposed, and the interphase transfer enthalpy△H and interphase transfer entropy △S were determined by experimental data. The temperature effect coefficient of the hydrophobic constant is discussed, which has the same order of magnitude as the literature value.