PHYSICAL CHEMISTRY OF INTERFACES AND ELECTROCHEMISTRY.

Coordinator: Dr. Dionisio Posadas

1. Electrosynthesis of electroative polymer derived from substituted aryl amines. Study of the physical and chemical properties of these polymers. These polymers can be employed as electrodes for batteries, sensors, electrochromic displays, mechanical actuators and molecular electronics.

2. Modification of metallic and semicoducting surfaces by electrodeposition or adsorption of submonolayers of foreign metals. This modification changes the substrate reactivity towards different types of chemical reactions. The physical and chemical properties of the resulting system are studied by different techniques.

3. Study of systems capable of transport charge from a redox couple to a metal by a mechanism is of redox mediation. These processes are similar to those that happen in biological systems during the oxidative phosphorilation at the level of the mitochondria in living cells.

4. Study of the mechanisms that determine the adherence of colloidal particles onto metallic substrates. These phenomena are important in several industrial processes in which contamination of a surface occurs by these mechanisms

Research Staff

María I. Florit, Ricardo Tucceri
Waldemar A. Marmisollé

Selected publications in the frame of this project (2007 - 2008)

* “Redox Mediation at Electroactive Polymer Coated Electrodes:Mechanistic Diagnosis Criteria from Steady State Polarization Curves”.
G.O. Ybarra, C.A. Moina, M.I. Florit y D. Posadas
Journal of Electroanalytical Chemistry 609, 129-139 (2007).

* “Conditioning treatment to improve the potentiometric pH response of polydiphenylamine modified electrodes”.
M.J. Rodríguez Presa, D. Posadas y M.I. Florit
Sensors and Actuators B 123, 142-147 (2007).

* “The mediation reaction between the external couple Ferri/Ferrocyanide and Os(II) bipyridile poly vinylpiridile”.
G.O.Ybarra, C.A. Moina, M.I. Florit y D. Posadas
Electrochimica Acta 53, 3727-3731 (2008).

* “Current Rectification by Mediating Electroactive Polymers”.
G.O. Ybarra, C. Moina, M.I. Florit y D. Posadas
Electrochimica Acta 53, 3955-3959 (2008).

* “Electrochemical Aging of Poly(aniline) and Its Ring Substituted Derivatives”.
W.A. Marmisollé, D. Posadas y M.I. Florit
Journal of Physical Chemistry B 112, 10800-10805 (2008).