Electroactive mixed self-assembled monolayers: Lateral interactions model updated to interactions between redox and non-redox species

The lateral interactions model, dedicated to random and non-random distributed electroactive species on redox responsive self-assembled monolayers (SAM), was extended to interactions between redox and non-redox species. This approach supports an unusual result achieved in the field of electrochemical transduction without covalent links between redox and complexant units in mixed SAM. (C) 2013 Elsevier B.V. All rights reserved

Electrocatalytic activity of nitroxyl mixed self-assembled monolayers: combined effects of the nanoscale organization and the composition

The aim of this article is to demonstrate that the composition and distribution of electroactive species immobilized on a gold surface can have a significant influence on the reactivity of modified surfaces. It will be shown that on mixed SAMs, where the electroactive species (TEMPO) are diluted with alkanethiols of different lengths, the contribution of the surface distribution on the electrocatalytic activity is as important as the composition. Without any information on the distribution of species within the monolayer, the interpretation of results cannot be reliable

The stepwise oxidation of indolino[2,1-b]oxazolidine derivatives

This work presents an original strategy to modulate the electrochemical properties of the indolino[2,1-b]oxazolidine core appropriately substituted in position 5 (para-substitution of the phenyl ring) by acceptor or donor groups (CHO, OMe, Me, F, H, Cl, Br). Supported by spectroelectrochemical experiments and confronted to electrochemical simulations, the stepwise oxidation of indolino[2,1-b]oxazolidine derivatives involves an electrochemical mechanism which depends on the para-substitution of the phenyl ring and leads to either the formation of a stable radical cation, the opening of the oxazolidine ring or an irreversible aryl C-C coupling

Phase segregation on electroactive self-assembled monolayers: a numerical approach for describing lateral interactions between redox centers

A numerical method is proposed in order to differentiate a random distribution from a phase segregation of redox centers on (mixed) SAMs. This approach is compared to Laviron’s interactions model and voltammetric data of nitroxylalkanethiolate SAMs

Impact of the Nanoscale Organization of Nitroxyl Mixed Self-Assembled Monolayers on their Electrocatalytic Behaviour

Electrocatalysis: The molecular distribution of redox centers on mixed nitroxyl SAMs strongly influences the electrocatalytic reactivity

Real-time absorption spectroelectrochemistry: From solution to monolayer

High-sensitivity charge coupled-device (CCD) cameras, efficient fibre optic bundles, high stable light source and 3D printing technologies now open large possibilities to probe redox species in solution and on confined surface by real-time absorption spectroelectrochemistry. This short review aims at providing an overview of the first work of absorption spectroelectrochemistry on redox-responsive self-assembled monolayers (SAMs). Some practical aspects are emphasized to not underestimate the difficulties involved in set-up such instrumentation