硝基甲苯异构体的液晶溶液热力学性质的色谱法研究 |
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引用本文: | 王正刚,夏方明,左明,傅若农. 硝基甲苯异构体的液晶溶液热力学性质的色谱法研究[J]. 化学学报, 1991, 49(2): 113-120 |
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作者姓名: | 王正刚 夏方明 左明 傅若农 |
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作者单位: | 北京理工大学化工系,北京理工大学化工系,北京理工大学化工系,北京理工大学化工系 北京 100081,北京 100081,北京 100081,北京 100081 |
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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(PBH~xB)和双(对庚氧基苯甲酸)对苯二酚酯(PBH~pB)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。
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关 键 词: | 热力学性质 气相色谱 溶液 液晶 硝基苯 P 熵 焓 自由能 异构体 苯二酚 P |
Study on thermodynamic quantities of solution of nitrotoluene isomers in liquid crystals with GLC |
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Abstract: | Thermodn. results from gas-liq. chromatog. (GLC) are reported for three nonmesorphic solutes-nitrotoluene isomers in the nematic liquid crystal phases of two solvents PBHxB (p-phenylene bis-n-hexyloxybenzoate) and PBHpB (p-phenylene bis-n-heptyloxybenzoate). The specific retention vol. 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 determine 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 mol. solute-solvent interactions. |
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Keywords: | THERMODYNAMIC PROPERTIES GAS CHROMATOGRAPHY SOLUTION LIQUID CRYSTAL NITROBENZENE P ENTROPY ENTHALPY FREE ENERGY ISOMER BENZENEDIOL P |
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