Estimation of parameters characterizing the adsorption of sodium, potassium, and rubidium cryptates at the mercury electrode/solution interface

被引：6
作者：
Stenina, EV [1 ]
Sviridova, LN [1 ]
机构：
[1] Moscow MV Lomonosov State Univ, Moscow 119992, Russia
来源：
RUSSIAN JOURNAL OF ELECTROCHEMISTRY | 2005年 / 41卷 / 04期
基金：
俄罗斯基础研究基金会;
关键词：
adsorption; kryptofix; 222; cryptates; adsorption parameters; regression technique; simulation;
D O I：
10.1007/s11175-005-0085-0
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
The adsorption of complexes formed by sodium, potassium, and rubidium cations with macrobicyclic ligand (kryptofix 222 with C18H36N2O6 Composition) is studied as a function of the ligand concentration on a stationary mercury drop in 0.1 M solutions of corresponding sulfates and chlorides by using the differential capacitance technique. Based on the model of two parallel capacitors supplemented by the Frumkin isotherm, the adsorption parameters of studied cryptates are estimated by using the regression analysis technique. Differential capacitance curves calculated with the parameters found are compared with experimental data. The comparison of the found adsorption parameters makes it possible to reveal the effects of the nature of included cations and specifically adsorbed supporting-electrolyte anions on the adsorption behavior of cryptates under study.
引用
收藏
页码：414 / 420
页数：7
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