反气相色谱测定双阳离子型离子液体的溶解度参数

采用反气相色谱法,于343.15 K到363.15 K温度下测定了双阳离子型离子液体1,10-双(N-甲基咪唑鎓)癸烷六氟磷酸盐［C10(MIM)2］［PF6］2的溶解度参数。以正辛烷、正十二烷、正十四烷和正十六烷为探针溶剂,计算了探针溶剂的特性保留体积(V0g)、摩尔吸收焓(ΔHS1)、无限稀释摩尔混合焓(ΔH∞1)、摩尔蒸发焓(ΔHv)、无限稀释活度系数(γ∞12)以及探针溶剂与［C10(MIM)2］［PF6］2的Flory-Huggins相互作用参数(χ∞12),测得该离子液体的溶解度参数(δ2)为15.01 (J5cm~3)1/2。这一结果对研究离子液体的溶液性质和应用有指导作用。

Determination of solubility parameter for dicationic ionic liquid by inverse gas chromatography

An inverse gas chromatographic method has been used to measure the solubility parameter of the dicationic ionic liquid, 1,10-bis(3-methylimidazolium-1-yl)decane hexafluorophosphate ［C10(MIM)2］［PF6］2, at the absolute temperatures from 343.15 K to 363.15 K. The test probe solvents were n-octane, n-dodecane, n-tetradecane, and n-hexadecane. The specific retention volumes of the solvents (V0g), the molar enthalpy of sorption (ΔHS1), the partial molar enthalpy of mixing at infinite dilution (ΔH∞1), the molar enthalpy of vaporization (ΔHv), the activity coefficients at infinite dilution (γ∞12), Flory-Huggins interaction parameters (χ∞12) between ［C10(MIM)2］［PF6］2 and probe solvents were obtained. The solubility parameter (δ2) of ［C10(MIM)2］［PF6］2 was determined as 15.01 (J5cm~3)1/2, which was of great importance to the study of the solution behavior and application for ionic liquid.