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合成了新型镧三元配合物La(Glu)(Im)6(ClO4)3·4HClO4·4H2O(Glu,谷氨酸;Im,咪唑).用高精度全自动绝热量热仪测定了该配合物晶体80-390K温区的热容,利用实验热容数据,建立了热容随温度变化的多项式方程;根据焓、熵与热容的关系,求出了配合物在80-390K温区内相对于298.15K的标准热力学函数(HT-H298.15)和(ST-S298.15).绝热量热和差示扫描量热(DSC)分析均发现配合物在216和246K附近存在玻璃态和晶型转变,其机理可能是配合物中高氯酸根离子重取向运动.用热重法(TG)检测了配合物的高温热稳定性并提出了可能的热分解机理.
A novel lanthanum ternary complex La (Glu) (Im) 6 (ClO4) 3 · 4HClO4 · 4H2O (Glu, glutamic acid; Im, imidazole) was synthesized. The complex was determined by high-precision automatic adiabatic calorimeter According to the relationship between enthalpy, entropy and heat capacity, the relative density of the complex in the temperature range of 80-390K was obtained. The standard thermodynamic functions (HT-H298.15) and (ST-S298.15) at 298.15 K. Both adiabatic calorimetry and differential scanning calorimetry (DSC) The mechanism may be the reorientation of perchlorate ion in the complex.High temperature thermal stability of the complex was detected by thermogravimetry (TG) and the possible mechanism of thermal decomposition was proposed.