摘要
将六水氯化钐,水杨酸与硫代脯氨酸3种物质一起反应,制得了一种新的稀土三元固体配合物[Sm(C7H5O3)2(C4H6NO2S)].2H2O(s)。通过红外光谱、热重差热分析、元素分析等手段确定了其结构与组成。在常压、298.15 K下,分别测定了六水氯化钐、水杨酸、硫代脯氨酸和该配合物在混合溶剂(二甲亚砜∶乙醇∶3 mol.L-1HCl=1∶1∶1)中的溶解焓,并根据热化学原理得出了298.15 K时配合物[Sm(C7H5O3)2(C4H6NO2S)].2H2O(s)的标准摩尔生成焓ΔfHmΘ=(-2913.73±3.10)kJ.mol-1。
The product made from reaction of samarium chloride hexahydrate with salicylic acid and thioproline, [Sm (C7H503) 2· ( C4H6NO2S ) ]· 2H2O, was synthesized and characterized by IR, elemental analysis and thermogravimatric analysis. The enthalpies of solution of [ SmCl3 ·6H2O ( s ) ], [ 2C7H6O3 ( s ) ], [C4HTNO2S (s) ] and [ Sm ( C7H5O3 )2·( C4H7NO2S)· H2O(s) 1 in a mixed solvent of absolute ethyl alcohol, dimethyl sulfoxide (DMSO) and 3 mol· L^-1 HCI ( aq )were determined by calorimetry to be - 46. 680.15 kJ·mol^-1, (25.19±0.02) kJ·mol^-1, (16.20± 0.17) kJ·mol^-1 and ( - 81.24 ± 0.67) kJ·mol^-1, respectively. According to the design thermoehemical calculation, the standard molar enthalpy of formation of Sm ( C7H5O3 )2·( C4H6NOES)· 2HEO (s) was obtained to be ΔfHmΘ [ Sm ( C7H5O3 )2·( C4H6NO2S )·2H2O (s), 298.15 K] = ( - 2912.03 ± 3.10) kJ·mol^-1.
出处
《中国稀土学报》
CAS
CSCD
北大核心
2008年第6期677-682,共6页
Journal of the Chinese Society of Rare Earths
基金
湖南省教育厅资助课题(04C635)
湖南省自然科学基金资助课题(08JJ3014)
关键词
稀土配合物
六水氯化钐
硫代脯氨酸
水杨酸
热化学
rare earths complex
samarium chloride six-hydrate
thioproline
salicylic acid
thermochemistry