Dynamics of Successive Complex Formation in facilitated

促进中连续复杂形成的动力学

• 批准号: 03804042
• 负责人: KAKIUCHI Takashi
• 金额: $ 1.02万
• 依托单位: KYOTO UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1991
• 资助国家: 日本
• 起止时间: 1991 至 1992
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-03804042/
• 关键词: ion transfer; complexation; acyclic polyethers; crown ethers; ion transfer across liquid-liquid interface; successive complex formation; イオノフォア; 油水界面; クラウンエ-テル

A new method has been proposed for determining the stability constants of 1:1 and 1:2 complexes in facilitated ion transfer across the liquid-liquid interface. The stability constants were determined electrochemically for complexes of alkali and alkaline-earth metal ions with several acyclic and cyclic polyethers. Effect of ligand adsorption at the liquid-liquid interface was also estimated quantitatively. The present study has revealed that even in reversible ion transfer facilitated by fast complexation with hydrophobic ionophores the current carrying species of ion-ionophore complexes may varies depending on the dynamics of concentration profiles of pertinent chemical species in the vicinity of the interface during the passage of ion transfer current. This dynamics of ion-ionophore complexation is important in determining optimal condition of the extraction of ions in solvent extraction and also the selective detection of ions with ion-selective electrode. A way of extending the present method to the study of complex formation involved with quasi-reversible transfer of ions and also complexation with slow chemical reactions is suggested.

本文提出了一种测定1：1和1：2络合物在液-液界面促进离子转移中稳定常数的新方法。用电化学方法测定了碱金属和碱土金属离子与几种非环状和环状聚醚的络合物的稳定常数。定量地估计了配体在液-液界面吸附的影响。本研究表明，即使在可逆的离子转移促进快速络合与疏水性离子载体的离子-离子载体复合物的载流物种可能会有所不同，这取决于在离子转移电流的通道过程中的界面附近的相关化学物种的浓度分布的动态。离子-离子载体络合的动力学对于确定溶剂萃取中离子萃取的最佳条件以及离子选择性电极对离子的选择性检测是重要的。本文提出了一种将本方法扩展到研究离子准可逆转移络合物形成和缓慢化学反应络合的方法。

项目成果

Takashi KAKIUCHI: "″Successive complex form ation of multivalent ions with octaethylene glycol dodecyl ethers at the nitrobenzene-water interfaces″" J.Electroanal. Chem.,.

Takashi KAKIUCHI：““多价离子与八乙二醇十二烷基醚在硝基苯-水界面连续形成络合物””J.Electroanal. Chem.,.

Takashi KAKIUCHI: "″Current-potential curves for facilitated ion transfer across oil/water inter-faces in the presence of successive complex formation″" J.Electroanal. Chem.,. 300. 431-445 (1991)

Takashi KAKIUCHI：“在连续形成复合物的情况下促进离子跨油/水界面转移的电流-电位曲线”J.Electroanal. Chem.,. 300. 431-445 (1991)

Takashi Kakiuchi: "Current-potential curves for facilitated ion transfer across oil/water interfaces in the presence of successive complex formation" J. Electroanal. Chem.300. 431 (1991)

Takashi Kakiuchi：“在连续形成复合物的情况下促进离子跨油/水界面转移的电流-电位曲线”J. Electroanal。

Takashi Kakiuchi: ""Effect of successive complex formation onthe facilitated ion transfer across the oil/water interface facilitated by lipophilic crown ethers" Anal. Sci.,. 7. 591-594 (1991)

Takashi Kakiuchi：“连续复合物形成对亲脂性冠醚促进的油/水界面促进离子转移的影响”Anal. Sci.,. 7. 591-594 (1991)

Takashi Kakiuchi: ""Successive complex formation of multivalent ions with octaethylene glycol dodecyl ethers at the nitrobenzenewater interfaces"" J. Electroanal. chem.,.

Takashi Kakiuchi：“在硝基苯水界面处与八乙二醇十二烷基醚连续形成多价离子的络合物”J. Electroanal。