摘要
在298.15K下利用等温环境溶解反应热量计测定了离子液体C3MIBF4(四氟硼酸1-甲基-3-丙基咪唑)和C5MIBF4(四氟硼酸1-甲基-3-戊基咪唑)不同浓度水溶液的摩尔溶解焓(ΔsHm).借助Pitzer电解质溶液理论,得到了它们的标准摩尔溶解焓(ΔsHm)和Pitzer焓参数:βM(0X)L和βM(1X)L,并计算了表观相对摩尔焓.根据Glasser理论计算了离子液体晶格能,进而估算了离子液体C5MIBF4和C3MIBF4中正离子的水化焓分别为-171kJ·mol-1(C5MI+)和-207kJ·mol-1(C3MI+).
The molar enthalpies of dissolution （△sHm） of ionic liquids C3MIBF4 （1-methyl-3-propylimidazolium tetrafluoroborate） and C5MIBF4 （1-methyl-3-pentylimidazolium tetrafluoroborate） in water were determined by a solution-reaction isoperibol calorimeter at 298.15 K. According to Pitzer＇s electrolyte solution theory, the standard molar enthalpy values of solutions of C3MIBF4 and C5MIBF4, △sHm^- and Pitzer parameters： βMX^（0）L and βMX^（1）L, were obtained, respectively. The hydration enthalpies of cations △H^＋ in C5MIBF4 and C3MIBF4 estimated from Glasser＇s theory of lattice energy were - 171 and -207 kJ·mol^-1, respectively.
出处
《化学学报》
SCIE
CAS
CSCD
北大核心
2008年第4期408-412,共5页
Acta Chimica Sinica
基金
国家自然科学基金(No.20473036)资助项目
