Catalytic Reduction of Organohalide Pollutants by Myoglobin in a Biomembrane-like Surfactant Film

Electrocatalysis of the reduction of organic halide derivatives at modified electrodes coated by cobalt and iron macrocyclic complex-based films: application to the electrochemical determination of pollutants

“…It is important to note that the observed electroactivity of the entrapped Hemin remains stable and unchanged for hours (up to 8 hours) upon the immersion of the electrode in the electrolytic solution and/or repeated voltammetric scans if the potential range is restricted to a -1.3 V in the cathodic side. This tends to show that no loss of the entrapped complex is effective in the electrolytic solution, contrary to the previously reported observation by Nassar et al [14]. Figure 2 shows the square wave voltammograms obtained with DDAB/Hemin modified electrode in acetate buffer solution (pH = 5.6) in the presence of TCA (Fig.…”

“…This means that the Fe(II)/Fe(I) redox couple of the embedded Hemin is involved in the catalytic reduction of TCA and DCA. The catalytic process can be related to an outer-sphere mechanism in which the electron transfer takes place between the active form of the reduced Hemin [Fe(I)] and the organic halide, as previously suggested and analyzed by cyclic voltammetry [14,15]. It should be noted that the reduction of TCA and DCA on DDAB modified electrodes (without…”

“…Finally, Rusling and coworkers [14] reported the catalytic reduction of organohalides using a membrane-like surfactant films of myoglobin and didodecyldimethylammonium bromide. The reduction reactions of the studied organohalogenated derivatives occurs at potentials about one volt more positive than the corresponding ones on a bare electrode.…”

Electrocatalysis of Some Biomacromolecules at C60 / DDAB Films

“…Rusling etc. [28] have reported that electron transfer rates for Mb in liquid crystal films of lipid-like surfactants are over 1000-fold larger than those on bare Au, Pt and carbon electrodes.…”

Electroactive Film of Myoglobin Incorporated in a 3D-porous Calcium Alginate Film with Polyvinyl Alcohol, Glycerin and Gelatin

“…4,5 Such a thin film may provide a favorable microenvironment for the proteins, and enhance the DET between proteins and electrodes, thus offering opportunities for investigating the enzyme electrochemistry. 3,6 Successful examples have included cast films of proteins with biopolymers, 7 insoluble surfactants, 8 hydrogel polymers, 9 and inorganic-organic composite materials. 10 Some materials form a film-featured three-dimension (3D) porous structure.…”