Abstract
用中和法合成了氨基酸离子液体1-乙基-3-甲基咪唑丙氨酸([C2mim][Ala]),并利用恒温环境的溶解反应热量计,在(288.15±0.01)K-(308.15±0.01)K温度范围内每隔5K,测定不同质量摩尔浓度离子液体在水中的溶解焓(△sol Hm).根据Archer的方法,通过线性拟合得到了该离子液体的标准摩尔溶解焓(△solHmθ),并计算了其相对表观摩尔溶解焓(ΦL).在298.15 K下,根据Glasser经验方法得到了格子能UPOT=566 kJ· mol-1,并计算了其阴阳离子水化焓值(△H++ △H-)=-620 kJ·mol-1及阴离子水化焓△H-([Ala]-)=-387 kJ· mol-1此外,估算了[C2mim][Ala]水溶液的热容(Cp(sol))和表观摩尔热容(ΦCp).
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