硝基甲苯异构体在芳羧酸酯液晶溶液中热力学性质的色谱法研究

A Chromatographical Study on Thermodynamic Quantities of Solution of Disubstituted Benzene Isomers in Liquid Crystals

应用气液色谱法测定了硝基甲苯异构体在液晶MPBOB[双-(对辛氧基苯甲酸)邻甲基对苯二酚酯]和MPBH_2B[双-(对已氧基苯甲酸)邻甲基对苯二酚酯]溶剂中,无限稀释条件下的活度系数。通过热力学量溶解焓、溶解熵、超额溶解焓和超额溶解熵的计算,对溶剂液晶的分离选择性进行了热力学的解释和说明。

Infinite dilution activity coefficients of nitrotoluene isomers in the liquid crystal solvents MPBOB and MPBH_xB were determined with gas-liquid chromatography method. From these coofficients, enthalpy of solution and entropy of solution, excess enthalpy and excess entropy were calculated, Finaly, the selectivity of the liquid crystal solvents were interpreted in terms of the thermodynamic resules.