Self-assembled monolayers electrochemistry

Ion A, Partali V, Sliwka HR, and Banica FG. 2002. Electrochemistry of a carotenoid self-assembled monolayer. Electrochemistry Communications 4(9) 674-678. 

Oyamatsu D, KanayaN, Hirano Y, NishizawaM, Matsue T. Area-selective immobilization of multi enzymes by using the reductive desorption of self-assembled monolayer. Electrochemistry 2003 71 439-441. 

Y. Tian, L. Mao, T. Okajima, and T. Ohsaka, Electrochemistry and electrocatalytic activities of superoxide dismutases at gold electrodes modified with a self-assembled monolayer. Anal. Chem. 76, 4162-4168 (2004). 

Structure, Electrochemistry and Applications of Self-Assembled Monolayers of Thiols... 

Like the currently popular area, called nanoscience , the field of supramolecular chemistry has rather hazy boundaries. Indeed, both areas now share much common ground in terms of the types of systems that are considered. From the beginning, electrochemistry, which provides a powerful complement to spectroscopic techniques, has played an important role in characterizing such systems and this very useful book goes considerably beyond the volume on this same topic by Kaifer and Gomez-Kaifer that was published about 10 years ago. Some of the classic supramolecular chemistry topics such as rotaxanes, catenanes, host-guest interactions, dendrimers, and self-assembled monolayers remain, but now with important extensions into the realms of fullerenes, carbon nanotubes, and biomolecules, like DNA. 

Fast electrochemistry, especially for self-assembled monolayers containing redox-active groups [3-5]. 

Ozoemena K I, Nyokong T Westbroek P (2003) Self-assembled monolayers of cobalt and iron phthalocyanine complexes on gold electrodes Comparative surface electrochemistry and electrocatalytic interaction with thiols and thiocyanate. Electroanalysis 15(22) 1762-1770... 

Ozoemena KI, Nyokong T (2005) Surface electrochemistry of iron phthalocyanine axially ligated to 4-mercaptopyridine self-assembled monolayers at gold electrode Applications to electrocatalytic oxidation and detection of thiocyanate. J Electroanal Chem 579(2) 283-289... 

Ozoemena KI, Nyokong T (2006) Comparative electrochemistry and electrocatalytic activities of cobalt, iron and manganese phthalocyanine complexes axially co-ordinated to mercaptopyridine self-assembled monolayer at gold electrodes. Electrochim Acta 51(13) 2669-2677... 

A number of important conclusions were drawn from this study, as follows. Electrochemical reversibility in electroactive self-assembled monolayers depends upon concentration and polarity of a covalently attached redox probe. Reversible surface electrochemistry is observed for the well-diluted ferrocenyl ester. However, reversibility decreases with steric congestion of redox probe because higher redox probe concentrations lead to disorder due to cross-sectional mismatch of the redox probe and the alkyl chain. Reversibility also decreases with a nonpolar redox probe the alkylferrocene (System 4) yields broad peaks with long tails positive of E°, consistent with kinetic dispersion of the redox probes and their differential solvation in the SAM. 

Self-assembled monolayers of isomerizable compounds can give nst tc surfaces with switchable permeability, thus resulting in different interfacial electrochemistry for a diffusional redox probe. A self-assembled monolayer of 4-cyano-4 -(10-thiodecoxy)stilbene on a Au-electrode demonstrated a higher blocking effect for the [Fe(CN)g] electrochemistry when it was in... 

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