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由于碳酸丙烯酯(PC)具有较宽的液相区间(mp:224.0K,bp:514.9K)、较高的介电常数(64.92,298.15K)和较大的偶极矩(4.94D),它是一个在工业和科学研究中有广泛应用的非质子型极性溶剂。已有大量文献就PC溶液中电解质-PC、非电解质-PC和离子-离子间的相互作用情况作了报导。对于非电解质-电解质-PC三元系中溶质-溶剂间的相互作用情况还缺乏了解。本文希望通过测定非电解质溶质在PC的电解质溶液中的无限稀释活度系数γ_1~∞,对非水溶液中的溶质-溶剂作用情况有新的了解。气液色谱法(CLC)是测定无限稀释溶液活度系数的有效方法之一。作者曾利用GLC测定了一些烃、氯代烃、醇、酮在环丁砜电解质溶液中的无限稀释活度系数和盐效应常数.
Since propylene carbonate (PC) has a wide range of liquid phases (mp: 224.0K, bp: 514.9K), higher dielectric constant (64.92,298.15K) and larger dipole moment (4.94D) It is an aprotic polar solvent widely used in industrial and scientific research. A large body of literature has been reported on the interaction between electrolyte-PC, non-electrolyte-PC and ion-ions in PC solutions. There is a lack of understanding of solute-solvent interactions in non-electrolyte-electrolyte-PC ternary systems. In this paper, we hope to gain a new insight into the effect of solute-solvent in non-aqueous solution by measuring the infinite dilution activity coefficient γ_1 ~ ∞ of non-electrolyte solutes in PC electrolyte solution. Gas-liquid chromatography (CLC) is one of the most effective methods to determine the activity coefficient of infinite dilute solution. The authors have used GLC to determine the infinite dilution activity coefficients and salt effect constants of some hydrocarbons, chlorinated hydrocarbons, alcohols and ketones in sulfolane electrolyte solutions.