摘要
在充满干燥氩气的手套箱中用直接混合等物质的量的EMIC(氯化1-甲基-3-乙基咪唑)和高纯无水InCl3的方法,制备了含稀散金属铟的离子液体EMIInCl4.在298.15K下,利用自行组装的具有恒温环境的溶解反应热量计,测定了离子液体EMIInCl4和EMIC在水中的反应溶解热,并将这些实验数据按Pitzer方程作拟合,分别得到了EMIInCl4和EMIC的无限稀释摩尔溶解热?sHm0和Pitzer溶解焓参数.根据溶解热和水化热数据,估算了InCl-4(g)解离成In3+(g)和4Cl-(g)的解离热,还估算了反应:EMIC+InCl3→EMIInCl4的摩尔反应热?rHm=(-60.37±1.8)kJ?mol-1.在合成离子液体EMIInCl4中也观察到了放热现象,这表明在合成过程中生成了InCl-4.
A colorless and transparent ionic liquid EMⅡnCl4 was prepared by mixing 1-ethyl- 3-methylimidazolium chloride （EMIC） with InCl3 in a glove box filled with dry argon. The molar dissolution enthalpies （△sHm） of EMIC and EMⅡnCl4 in water with various molalities were determined by a solution-reaction isoperibol calorimeter at 298.15 K. In terms of Pitzer electrolyte solution theory, the molar dissolution enthalpy of EMIC and EMⅡnCl4 at infinite dilution （ △sHm^0 ） and Pitzer parameters （ βMX^（0）L, β MX^（1）Land CMX^ФL ） were obtained, respectively. Using values of the dissolution enthalpies and the hydration heat, the dissociation heat of InCL4 （△dHm） and the enthalpy change （△rHm） for the reaction of EMIC＋InCL3→ EMⅡnCl4 were estimated respectively. The result, △rHm= （-60.37 ± 1.8） kJ·mol^-1, was in agreement with exothermic phenomenon observed while the ionic liquid was synthesized.
出处
《化学学报》
SCIE
CAS
CSCD
北大核心
2006年第13期1385-1388,共4页
Acta Chimica Sinica
基金
国家自然科学基金(No.20473036)
辽宁省教育厅基金(No.2004C066)资助项目.
