氯化钐与甘氨酸配合物Sm(Gly)_2Cl_3·3H_2O热化学研究

Thermochemical Study on Complex of Samarium Chloride with Glycine, Sm(Gly)_2Cl_3·3H_2O

稀土氨基酸配合物是一类具有特殊性质和功能的生物无机化合物,在生物、医药、动物饲料、农用微肥等许多领域都具有广泛的应用前景。在生物体内,稀土离子和钙离子常常与构成蛋白质的氨基酸残基（氨基、羧基等）结合，形成活性体。因此，对稀土氨基酸配合物的深入研究，有助于了解生物体的一些复杂生理和生命现象．从而引起人们对研究稀土氨基酸配合物的兴趣。目前这类配合物的制备和性质报道较多．但基础热化学的研究报道较少，为此．我们进行了这方面的研究工作。

A complex of samarium with glymine, [Sm（Gly）2Cl3·3H2O ], was synthesized and characterized by DSC, TG and DTG. A possible mechanism of thermal decomposition of this complex was suggested. The heat capacities of the complex were measured by a precision adiabatic calorimeter over the temperature range from 82 to 375 K. The solution enthalpies of reactants [SmCl3·6H2O ＋2Gly] and the products [Sm（Gly）2Cl3·3H2O ＋3H2O] were determined by an isoperibel solutionreaction calorimeter at 298.15 K, respectively; the standard molar enthalpy of formation of [Sm（Gly）2Cl3·3H2O] was calculated through a designed thermochemical cycle.