硝基甲苯异构体的液晶溶液热力学性质的色谱法研究  

Study on Thermodynamic Quantities of Solution of Nitrotoiuene Isomers in Liquid Crystals with GLC

作　　者：王正刚[1] 夏方明[1] 左明 傅若农[1] 

机构地区：[1]北京理工大学化工系,北京100081

出　　处：《化学学报》1991年第2期113-120,共8页Acta Chimica Sinica

基　　金：国家自然科学基金

摘　　要：本文用气液色谱方法研究了o-,m-,p-硝基甲苯三种异构体在双(对己氧基苯甲酸)对苯二酚酯(PBHxB)和双(对庚氧基苯甲酸)对苯二酚酯(PBHpB)两种向列液晶固定液中无限稀薄条件下的活度系数,进而求得了超额焓,超额自由能和超额熵,同时得到溶解焓和溶解熵,并对结果进行了分析和讨论.Thermodynamic results from gas-liquid chromatography (GLC) are reportod for three nonmesorphic solutes-nitrotoluene isomers in the nematic liquid crystal phages of two solvents PBHxB (p-phenylene bis-n-hexyloxybenzoate) and PBHpB (p-phenylene bis-n-heptyloxybenzoate). The specific retention volume can be obtained from retention time. Infinite dilution solute activity coefficients are obtained at several temperature in two nematic phase. From these, the following solute partial molar quantities are determined in each phase excess enthalpy, excess Gibbs free enthalpy, excess entropy, enthalpy of solution, and entropy of solution. The results are discussed in terms of the molecular solute-solvent interactions.

关 键 词：硝基甲苯 异构体 液晶溶液 色谱法 

分 类 号：O625.11[理学—有机化学]