高氯酸钕和甘氨酸及丙氨酸混配型配合物的热化学研究  

Thermochemical Study of a Mixed Ligand Complex of Neodymium Perchlorate with Glycine and L-Alanine

作　　者：陈平初[1] 詹彤[1] 刘宛乔[1] 詹正坤[1] 屈松生[2] 

机构地区：[1]华中师范大学化学学院,湖北武汉430079 [2]武汉大学化学与分子科学学院,湖北武汉430072

出　　处：《武汉大学学报（理学版）》2002年第6期663-666,共4页Journal of Wuhan University:Natural Science Edition

基　　金：国家自然科学基金资助项目 ( 2 99730 33)

摘　　要：合成了高氯酸钕和甘氨酸、丙氨酸的混配型配合物 经热重、差热、化学分析及与有关文献对比 ,确定其组成为 {Nd2 (Gly) 5(Ala) 3(ClO4 ) 6·2H2 O} n,纯度为 98.75 % 用溶解量热法在具有恒定温度的反应热量计上分别测定了 2 98.15K时反应物和产物在 2mol·L-1的HCl中的溶解焓 设计一热化学循环求出配位反应的焓变ΔrHm,进而计算出配合物的标准生成焓 :ΔfH○———m {Nd2 (Gly) 5(Ala) 3(ClO4 ) 6·2H2 O} =- 70 2 0 .46kJ·mol-1.The Mixed ligand complex of Neodymium Perchlorate with Glycine and L-Alanine has been synthesized. Though the DTA,TG,chemistry analysis and comparing with literature, its form is {Nd 2(Gly) 5(Ala) 3(ClO 4) 62H 2O } n, and its purity is 98.75%. The dissolution enthalpies of the reactants and products in 2 mol·L -1 HCl solution (298.15 K) have been measured by using the isoperibol reaction calorimetry respectively. Δ rH m was calculated by a designed thermochemical cycle of the coordination reaction. From the results and other auxiliary quantities, the standard molar enthalpy formation of Nd 2(Gly) 5(Ala) 3(ClO 4) 6·2H 2O has been obtained to be Δ fH ○ -- m{ Nd 2(Gly) 5(Ala) 3(ClO 4) 6·2H 2O } =-7 020.46 kJ·mol -1.

关 键 词：高氯酸钕 甘氨酸 丙氨酸 混配型配合物 热化学 标准生成焓 稀土配合物 热化学 

分 类 号：O614.335[理学—无机化学] O64[理学—化学]