甘氨酸与氯化碱金属在水中的焓相互作用参数

氨基酸在混合溶液中的热力学性质及相互作用的研究不论对溶液化学还是生命科学都是十分重要的．对此国内已有不少的研究h，’1．利用偿效应的方法研究氨基酸与电解质间的相互作用是很有效的卜一句，但大多数的工作都是在低浓度下研究一个氨基酸分子和一个电解质离子对间的相互作用烩．本文测定了甘氨酸在水中和在LICI、NaCI、KCI的水溶液中的溶解偿，计算出甘氨酸与各个公在水中的偿对相互作用参数和三相互作用参数，并由此讨论了甘氨酸与这些盐的对分子相互作用和三分子相互作用．1实验部分试剂：甘氨酸为ARfa，K甲醇一水重结晶．LI…

The Enthalpic Interaction Parameters of Glycine with Some Alkali-Metal Chlorides

The enthalpies of solution of glycine in water and in aqueouse solutions containing LiCl, NaCl and KCl have been measured at 298.15 K. The enthalpic interac tion paramters hxy, hxxy and hxyy of glycine with the three salts have been evaluated.There are electrostatic and structural interaction between the electrolytes and glycine.The structural interaction includes the partial desolvation of the solutes and the effect of ions on the hydration structure of glycine. The enthalpic interaction parameters obtained show the dependence on the size of cations. An analysis for the enthalpic interaction pa rameters indicates that the structural interaction will be responsible for the dependence of the enthalpic interaction parameters on the size of cations.