物理化学学报 >> 2001, Vol. 17 >> Issue (08): 753-756.doi: 10.3866/PKU.WHXB20010818

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谷氨酸和精氨酸与铜离子混配合物的热化学

屈景年;刘义;李林尉;屈松生   

  1. 衡阳师范学院化学系，衡阳　421008;武汉大学化学与分子科学学院，武汉　430072
  • 收稿日期:2001-01-20 修回日期:2001-03-26 发布日期:2001-08-15
  • 通讯作者: 刘义 E-mail:liuyi@chem.whu.edu.cn

Thermochemical Study of Mixed-ligands Complexes of L-glutamic Acid and L-arginine Acid with Copper Ions

Qu Jing-Nian;Liu Yi;Li Lin-Wei;Qu Song-Sheng   

  1. Department of Chemistry, Heng Yang Teacher′s College, Hengyang　421008;School of Chemistry and Molecular Sciences, Wuhan University, Wuhan　430072
  • Received:2001-01-20 Revised:2001-03-26 Published:2001-08-15
  • Contact: Liu Yi E-mail:liuyi@chem.whu.edu.cn

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摘要： 合成了谷氨酸和精氨酸与铜（Ⅱ)离子混配型配合物.经化学分析和元素分析及热重分析确定了配合物的组成，并采用溶解量热法在自行研制的具有恒定温度环境反应热量计上分别测定了反应物[LGlu(s)＋LArg(s)]、CuSO4 5H2O(s)和产物Cu稧lu稟rg稴O4 5H2O(s)溶解在2 mol稬－1H2SO4溶液中的溶解焓.通过所设计的热化学循环求出配位反应的焓变ΔrHm，进而计算出混配型配合物的标准生成焓，其值为（Cu稧lu稟rg稴O4 5H2O)=－3 923.145 kJ穖ol－1.

关键词: 氨基酸, 混配合物, 量热法, 热化学, 标准生成焓

Abstract: The Mixedligands complexes of Lglutamic acid and Larginine with Cu(Ⅱ) was synthesized. The composition of the complex was determined by chemical analysis, element analysis and thermal gravity analysis. By solution calorimetry in a reaction calorimeter at 298.2 K,the dissolution enthalpy for the reactant, CuSO4 5H2O(s), LGlutamic acid(s) and LArginine(s), and the product, Cu稧lu稟rg稴O4 5H2O(s), were determined. They were dissolved in 2 mol稬－1 H2SO4 solution, respectively. A themochemistry cycle was designed, to obtain the coordinate reaction enthalpy change,=(19.745 0.033) kJ穖ol－1, and the standard formation enthalpy of the mixedligands complex was calculated,=(－3923.145 3.768)kJ穖ol－1. This result offers a basic thermochemistry parameter for the further research of this kind of compounds.

Key words: Amino acids, Mixed-ligands complexes, Calorimetry, Thermochemistry