Measurement of the diffusion coefficients of [Ru(NH3)6]3+ and [Ru(NH3)6]2+ in aqueous solution using microelectrode double potential step chronoamperometry

被引：154

作者：

Wang, Yijun ^{[1
]}

Limon-Petersen, Juan G. ^{[1
]}

Compton, Richard G. ^{[1
]}

机构：

[1] Univ Oxford, Dept Chem, Phys & Theoret Chem Lab, Oxford OX1 3QZ, England

来源：

JOURNAL OF ELECTROANALYTICAL CHEMISTRY | 2011年 / 652卷 / 1-2期

关键词：

Diffusion coefficient; Hexaammineruthenium(III); Hexaammineruthenium(II); Ion-pairing; Stokes-Einstein equation; TEMPERATURE IONIC LIQUIDS; SUPPORTING ELECTROLYTE; RADICAL CATIONS; REDOX COUPLES; VOLTAMMETRY; FERROCENE; REDUCTION; COMPROPORTIONATION; BENZOQUINONE; OXIDATION;

D O I：

10.1016/j.jelechem.2010.12.011

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Microelectrode double potential step chronoamperometry is reported which allows the measurement of the diffusion coefficients of [Ru(NH3)(6)](3+) and [Ru(NH3)(6)](2+) in aqueous solutions containing various concentrations of the supporting electrolyte, KCl, KNO3 or K2SO4. In the case of K2SO4, ion-pairing of hexaammineruthenium cations is inferred where for KCl and KNO3 no such effects were noted. The triply charged ion was found to have a significantly lower diffusion coefficient than the doubly charged ion with a ratio of similar to 0.71 in the KCl and KNO3 media. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：13 / 17

页数：5

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