Electrochemical Transduction on Self-Assembled Monolayers: Are Covalent Links Essential?

Abstract

Electrochemical transduction without covalent links between redox and complexant units in a complexing self-assembled monolayer has been established. The results demonstrate that transduction depends on the crown ether/ferrocene ratio and appears to be tunable.

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

“…Based on the same empirical numerical approach previously used, characteristic parameters (E p , i p and FWHM) of cyclic voltamograms (CVs) are extracted and discussed. In addition, this work supports an unusual result achieved in the field of electrochemical transduction without covalent links between redox and complexant units in electroactive mixed SAM [5].…”

“…Blanchard et al [5] provides evidence of electrochemical transduction without a covalent link between redox (ferrocene) and complexant (crown ether) units in mixed SAMs and demonstrates, without giving further explanation, that the electrochemical transduction (i.e. the potential shift) depends on the crown ether/ferrocene ratio (i.e.…”

Absorption Spectroelectrochemistry on Mixed Perylenediimide‐Based Self‐Assembled Monolayers: Non‐Linear Dependence of Absorbance versus Surface Coverage

“…In order to use commercially available thermostated cell holders, the spectroelectrochemical cell is dimensionally close to the conventional quartz cuvette (outer dimensions=12.5 mm×12.5 mm×45 mm). The inner part of the cuvette (Hellma ® Analytics) has been specially redesigned in order to insert, parallel to the quartz windows, a home‐made interdigitated three Au electrodes with high precision . Spectrophotometric measurements were carried out in direct reflecting mode on the working electrode with a home‐made bench composed of Princeton Instruments modules (light sources, fibers, monochromators, spectroscopy camera and software).…”

“…Electrochemistry is known to be a powerful tool to probe redox‐active self‐assembled monolayers (SAMs) and establish detailed structure‐reactivity relationships for interfacial reactions, especially on mixed SAMs by taking advantage of its high sensitivity, specificity, accuracy and temporal resolution …”

Electroactive self-assembled monolayers: A versatile function to fit symmetric voltammetric peak

“…Figure 3 shows that GG function peak fitting is successfully extracting E p , i p , FWHM and  SG of experimental electroactive SAMs ((i.e. ferrocene [13], bithiophene [14], tetrathiafulvalene [15] and radical aminoxyl [10] units ), equally to one CV peak as to two. In the latter case, the two CV peaks were fitted with two GG functions of the same area (i.e.…”