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Enthalpy-entropy compensation combined with cohesive free-energy densities for tuning the melting temperatures of cyanobiphenyl derivatives

机译:焓熵补偿与内聚自由能密度相结合来调节氰基联苯衍生物的熔融温度

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摘要

This work illustrates how minor structural perturbations produced by methylation of 4′-(dodecyloxy)-4-cyanobiphenyl leads to enthalpy-entropy compensation for their melting processes, a trend which can be analyzed within the frame of a simple intermolecular cohesive model. The transformation of the melting thermodynamic parameters collected at variable temperatures into cohesive free-energy densities expressed at a common reference temperature results in a novel linear correlation, from which melting temperatures can be simply predicted from molecular volumes. In tune with temperature! The transformation of the melting thermodynamic parameters into cohesive free-energy densities (CFED) for 4′-(n-oxy)-i′-methyl-j-methyl-4-cyanobiphenyl (CnL~(i′,j)) provides a novel linear correlation for predicting melting temperatures in a simple way.
机译:这项工作说明了由4'-(十二烷基氧基)-4-氰基联苯甲基化产生的微小结构扰动如何导致其熔化过程的焓-熵补偿,这种趋势可以在简单的分子间内聚模型的框架内进行分析。将在可变温度下收集的熔融热力学参数转换为在共同参考温度下表达的内聚自由能密度,可以产生新颖的线性相关性,从中可以简单地从分子体积预测熔融温度。与温度同步!将熔融热力学参数转化为4'-(n-氧基)-i'-甲基-j-甲基-4-氰基联苯(CnL〜(i',j))的内聚自由能密度(CFED)新颖的线性相关性,以一种简单的方式预测熔化温度。

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