Adsorption and micellization influence the electrochemistry of redox surfactants derived from ferrocene

Abstract

for estimating double-layer effects when the admittance of the background electrolyte alone is measured.Acknowledgment. The financial support of the Office of Naval Research, Washington, DC, is gratefully acknowledged.

Ionic Interactions in Electroactive Self-Assembled Monolayers of Ferrocene Species.

“…At these low solution concentrations, the contribution to the voltanimetric response from solution phase C16 is negligible, so only the surface wave for adsorbed C16 is observed. Quite similar behavior was previously described for the C12 and C14 derivatives (5,8,9), although their tendency towards adsorption is somewhat lower, so that larger concentrations are required to achieve similar surface coverages. The EQCM frequency data obtained during the voltammetric scan indicate a monotonic mass decrease during the oxidation of the adsorbed redox surfactant, behavior which is also similar to that observed for C12 (5,8,9) and C14 (5).…”

“…The instrumentation for the EQCM measurements has been described in considerable detail elsewhere (5,7), as have the considerations pertinent to application of the EQCM to measurement of mass changes at electrode surfaces for species such as those studied here (5,(7)(8)(9). We deter discussion of details to a later section, but point out that the EQCM is capable of detecting mass changes at the electrode surface by virtue of changes in its resonant frequency caused by these mass changes.…”

Adsorptive Voltammetry of Polyelectrolyte Complex Between 11‐Ferrocenyltrimethylundecylammonium and Polyanions at Carbon Paste Electrode

“…As can been seen in Figure 2, the peak potential for FeTMUA-polyanion is higher than that for FeTMUA-Cl. According to the adsorption model of redox surfactant at electrode [14,15], the peak potential reflects free energy difference between the oxidizing agent adsorbed and the reducing agent adsorbed. When the free energy of the reducing agent is fairly small, peak potentials depends upon the stability of FeTMUA complex at electrode.…”

Potentiality of Reflectometry for the Study of the Adsorption on Dielectric and Metal Substrates: Application to the Adsorption of Polyvinylimidazole on Silica and Gold

“…In the case of a dielectric substrate, for the calculation of S = (R p /R s ), Eq. [11] is used, while for S 0 = (R p /R s ) 0 , Eq. [10] is employed.…”