| 利用络合物形成曲线设计金属络合物体系模型及优化络合物稳定常数(英文) |
| Modelling of Metal-Ligand System and Optimizing of Stability Constants by the Use of Polarographic Complex Formation Curves |
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| 摘要: |
| 关键词: 金属络合物体系 稳定常数 计算机分析程序 铋 邻吡啶甲酸 |
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| Abstract: In this paper the Bi(Ⅲ)-ligand(pyridine-2-carboxylic acid) system was studied by direct current sampled polarography (DC_TAST) at a fixed ratio of total-ligand to total-metal concentration and changing pH. The po-larographic experimental complex formation curve (ECFC) and the theoretical complex formation curve (TCFC) were used for modelling the metal-ligand system and optimizing stability constants. The ECFC， in which experi-mental parameters of polarography are included (a shift in a half-wave potential and a variation in a diffusion controlled limiting current)， appears to be a characteristic function for a particular metal-ligand system. The TCFC is a theoretical curve calculated for the designed metal-ligand model from mass-balance equation. Five bismuth complexes MHL， ML， ML2， ML3 and ML3(OH) with their stability constants as logβ 7.54±0.10， 7.50±0.02， 13.91±0.04， 18.15±0.03 and 26.75±0.02， respectively， are reported. |
| Keywords: metal complex system stability constant computer analytical program bismuth pyridine-2-carboxylic acid |
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| 张建民,石秋芝.利用络合物形成曲线设计金属络合物体系模型及优化络合物稳定常数(英文)[J].无机化学学报,2003,19(4):437-440. |
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