Issue 20, 2010

Lability of metal complexes at spherical sensors. Dynamic voltammetric measurements

Abstract

The diffusive-kinetic steady-state (dkss) approximation is applied to the case of a metal ion reaching a transforming/consuming spherical surface (sensor) when the ion is involved in a complexation reaction in solution. Simple time-dependent expressions for the surface metal flux, the lability degree and the half-wave potential are presented, valid for any value of the ratio of concentrations at the surface and the sensor radius. The solution presented is compared with other theoretical approaches, such as the kinetic steady state (kss) and the total steady state (tss), pointing out that the easy dkss approach is much more accurate than the tss one to study the metal flux and the lability degree for any value of the radius, from ultramicro to planar sensors.

Graphical abstract: Lability of metal complexes at spherical sensors. Dynamic voltammetric measurements

Article information

Article type
Paper
Submitted
27 Oct 2009
Accepted
17 Feb 2010
First published
01 Apr 2010

Phys. Chem. Chem. Phys., 2010,12, 5396-5404

Lability of metal complexes at spherical sensors. Dynamic voltammetric measurements

Á. Molina, F. Martínez-Ortiz, E. Laborda and J. Puy, Phys. Chem. Chem. Phys., 2010, 12, 5396 DOI: 10.1039/B922513G

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