配合物Zn(Val)SO_4·H_2O的低温热容和热力学研究  

Low-temperature heat capacities and thermodynamic properties of complex Zn(Val)SO_4·H-2O

作　　者：陈经涛[1] 谭志诚[2] 邸友莹[2] 高胜利[3] 孙立贤[2] 

机构地区：[1]陕西教育学院生化系,陕西西安710061 [2]中国科学院大连化学物理研究所热化学实验室,辽宁大连116023 [3]西北大学化学系,陕西西安710069

出　　处：《陕西师范大学学报（自然科学版）》2003年第3期73-77,共5页Journal of Shaanxi Normal University：Natural Science Edition

基　　金：国家自然科学基金资助项目(29773048)

摘　　要：用精密自动绝热热量计测定了配合物Zn(Val)SO4·H2O在78～373K温区的摩尔热容,通过热容曲线的解析得到该配合物起始脱水温度为327.05K.将该温区的摩尔热容实验值用最小二乘法拟合得到摩尔热容(Cp,m)对温度(T)的多项式方程,并计算了它的各种热力学函数.此外,用惰性气氛下的TG DTG及DSC对该配合物的热分解过程进行了研究.Lowtemperature heat capacities of the complex Zn(Val)SO4·H2O have been precisely measured with a small sample precision automated adiabatic calorimeter over the temperature range from 78 to 373 K. The initial dehydration temperature of the complex (T0=327.05 K) has been obtained by means of the analysis of heatcapacity curve. The experimental values of molar heat capacities have been fitted to a polynomial equation of heat capacities (Cp,m) vs. temperature (T) with the least square method, and the thermodynamic functions of the complex have been calculated on the basis of the equation. In addition, the thermal stability of the complex has been studied by TGDTG and DSC techniques under the atmosphere of nitrogen.

关 键 词：L-α-氨基酸锌配合物 Zn(Val)SO4·H2O 低温热容 热力学性质 摩尔热容 热分解 

分 类 号：O614.241[理学—无机化学] O642[理学—化学]