摘要
合成了稀土铒-L-脯氨酸配合物的氯化物晶体。经热重、差热及化学分析,确定其组成是[E r(L-pro)2(H2O)5]C l3,纯度为98.62%.熔点分析仪分析知其在503 K有不相合熔点。在78.9K^372.5K温区,用高精密全自动绝热量热仪对晶体配合物进行了热容测定。计算机拟合了在78.9K^349.7K平缓曲线温区热容对温度的多项式方程:Cp=-55.574+4.429T-0.0137T2+2.137×1-0 5T3。在常压、298.15K下用具有恒温环境的反应热量计测定了配合物的标准生成焓值为-3673.982 kJ.m o-l 1。
Rare earth chloride complex compound with L-praline [Er（L-pro）2（H2O）5]Cl3 was synthesized. By using TG, DTA and chemical analytic method, and comparing with relative literatures, its structure was characterized, and it has a purity of 98.62 %. It has a incongruent melting point of 503 K when analysized by melt point analyzer. Heat capacity measurement of this compound was carried out with a high--precise fully--automated adiabati calorimeter over the temperature range from 78.9 to 372.5 K,and no obvious thermal anomaly was observed. Th polynomial equation of heat capacity of this compound has be fitted as： Cp=55. 574＋4. 429 T-0. 0137 T^2＋ 2.13710^-5 T^3 in the temperature range of 78.9-349.7 K. The standard enthalpy of formation was measured as -3673.98 kJ· mol^-1 with isoperable reaction calorimeter at 298.15 K.
出处
《稀土》
EI
CAS
CSCD
北大核心
2006年第5期36-39,66,共5页
Chinese Rare Earths
基金
北京市组织部优秀人才培养专项经费资助项目(Z-03-23-04)
