中文摘要：

在298．15K下利用恒温环境溶解热量计测定了一系列含有已知微量水的1-丁基-3-甲基咪唑丙氨酸盐（[C4mim][Ala]）离子液体（IL）不同浓度样品的摩尔溶解焓．借助Debye—Htickel极限项，用外推法确定了不同含水量的[C4mim][Ala]样品的标准摩尔溶解焓[△sHm^θ（wc）]．随着样品中水含量的增加，△sHm^θ（wc）的绝对值下降，将△sHm^θ（wc）对含水量作图得到很好的直线，其截距△sHm^θ（wc）（pure IL）=-60．74kJ／mol，可看作是不含水的[C4mim][Ala]标准摩尔溶解焓的估算值．利用精密氧弹热量计测定了[C4mim][Ala]的燃烧热，计算得到其标准摩尔生成焓△sHm^θ（wc）（-675±11）kJ／mol．

英文摘要：

The enthalpies of solution of the ionic liquid （IL） based on alanine 1-butyl-3-methylimidazoliam alanine （ [ C4mim] [Ala] ）, with various amount of water, △solHm（wc） （wc） was measured over a molality range of about 0. 01-0. 06 mol/kg by the solution-reaction isoperibol calorimeter at 298.15 K. According to Archer＇s method, the standard molar enthalpies of solution of [ Cgmim] [ Ala ] with a known amounts of water, △sHm^θ（wc） were obtained. Plotting △sHm^θ（wc） against water content （w2）, was carried out, a good straight line was obtained and the intercept was the standard molar enthalpy of solution of [ C4mim] [ Ala] without water,△sHm^θ（wc） （ pure IL） = △sHm^θ（wc） （ pure IL） = - 60. 74 kJ/mol. Using an oxygen-bomb combustion calorimeter, the molar combustion enthalpy of [ C4mim] [ Ala] was determined at 298. 15 K and the standard molar formation enthalpy of [ C4 mim ] [ Ala ], △sHm^θ（wc） = （ - 675 ± 11 ） kJ/mol, was obtained.