MULTISWEEP CYCLIC VOLTAMMETRIC STUDIES ON THE EFFECT OF CHARGE ON DIFFUSION AND SORPTION PROCESSES OF ML(3)(N-MODIFIED ELECTRODES() CHELATES AT CLAY)

Citation
A. Fitch et Rj. Krzysik, MULTISWEEP CYCLIC VOLTAMMETRIC STUDIES ON THE EFFECT OF CHARGE ON DIFFUSION AND SORPTION PROCESSES OF ML(3)(N-MODIFIED ELECTRODES() CHELATES AT CLAY), Journal of electroanalytical chemistry [1992], 379(1-2), 1994, pp. 129-134
Citations number
28
Categorie Soggetti
Electrochemistry,"Chemistry Analytical
Journal title
Journal of electroanalytical chemistry [1992]
ISSN journal
15726657 → ACNP
Volume
379
Issue
1-2
Year of publication
1994
Pages
129 - 134
Database
ISI
SICI code
Abstract
The unique pattern of uptake of Cr(bpy)(3)(3+) at clay-modified electr odes can be attributed to two factors as deduced from experiments with Co(bpy)(3)(3+), Co(bpy)(3)(2+), and(-)d-Cr(bpy)(3)(3+). In the first case, transport of the trivalent species is accelerated across the fil m because of electrostatic considerations. The initial swelling of the clay film controls the extent of accelerated transport through the fi lm by establishing the interlayer dimensions. Valence, however, does n ot completely control the pattern of loading of the clay film with the complex. Cr(bpy)(3)(3+) and Co(bpy)(3)(3+) exhibit different rates of adsorption by the clay surface which contribute to the differing non- equilibrium loading patterns.