摘要
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.
出处
《无机化学学报》
SCIE
CAS
CSCD
北大核心
2007年第9期1639-1643,共5页
Chinese Journal of Inorganic Chemistry
基金
国家自然科学家基金资助项目(No.20373072)。
关键词
热化学
低温热容
标准生成焓
氯化钐-甘氨酸配合物
thermochemistry
low temperature heat capacity
standard enthalpy of formation
samarium chloride-glycine complex