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Position: Home > Articles > Determination and Quantizing Calculation of Stability Constant of Cu-lysine Journal of Anhui Agricultural Sciences 2010,38 (27) 15423-15425

赖氨酸铜稳定常数的测定及优化计算

作  者:
杨云裳;关晓;张应鹏;陈宇涛
单  位:
兰州理工大学石油化工学院
关键词:
赖氨酸;金属配合物;pH电位滴定;稳定常数;量子化学计算
摘  要:
采用pH电位滴定法测定了铜离子与赖氨酸配合物在离子强度为0.1mol/L(NaCl)、温度为25℃时的pH值变化,用半整数作图法得出配合物的稳定常数为:lgK1=10.6,lgK2=8.5,lgK3=2.1。并运用量子化学密度泛函理论对产物的几何构型进行了优化,同时计算得到了热分解反应的标准热力学量变。
译  名:
Determination and Quantizing Calculation of Stability Constant of Cu-lysine
作  者:
YANG Yun-shang et al(College of Petrochemical Processing,Lanzhou University of Technology,Lanzhou,Gansu 730050)
关键词:
Lysine;Metal complex;pH electric titration;Stability constant;Quantum chemical calculation
摘  要:
The change of pH value of Cu2+-lysine complex solution with ionic strength at 0.1 mol/L(NaCl)and temperature at 25 ℃ was determined by using pH electric titration.The stability constants of the complex were obtained by using half-integer graphing method as follows:lgK1=10.6,lgK2=8.5 and lgK3=2.1 resp.The geometric configuration of product was optimized by applying quantum chemical density functional theory and the standard thermodynamics quantitative change of thermal decomposition reaction was calculated out simultaneously.

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