硝酸镝与丙氨酸配位反应的热化学研究

A Thermochemical Study of the Coordination Reaction of Dysprosium Nitrate with Alanine

采用新型的具有恒温环境的反应热量计 ,以 2mol L的HCl作溶剂 ,分别测定了 [Dy(NO3) 3·6H2 O +4Ala]和Dy(Ala) 4(NO3) 3·H2 O在 2 5℃时的溶解焓。通过设计的热化学循环得到六水硝酸镝与丙氨酸配位反应的反应焓ΔrHmθ=30 .638kJ mol,并计算出配合物Dy(Ala) 4(NO3) 3·H2 O在 2 98.1 5K时的标准生成焓ΔfHmθ=-3833.8kJ

The molar dissolution enthalpy of the reactants and the products of the coordination reaction of dysprosium nitrate with alanine have been measured at 298.15K using an calorimeter.The calorimetric solvent is the solution of hydrochloric acid (2mol/L).From the results,the standard molar reaction enthalpy of this coordination has been determined,and △ r H m θ=30.638 kJ/mol, the standard molar enthalpy of formation of the new complex Dy(Ala) 4(NO 3) 3·H 2O has been calculated to be Δ f H m θ[Dy(Ala) 4(NO 3) 3·H 2O, s, 298.15K]=-3833.8 kJ/mol.