Oxidative polymerization of p-aminoazobenzene in acetonitrile

Detection of NADH via electrocatalytic oxidation at single-walled carbon nanotubes modified with Variamine blue

“…= +313 mV). The peak observed at +313 mV is characteristic for the oxidative polymerization of primary aromatic amines [39][40][41][42][43]. This is observed since the excess of VB, i.e.…”

A new modified electrode based on electrochemical oxidation of 1-amino-5,6,7,8-tetrahydronaphthalene in acetonitrile

“…10A. It can be observed that, for sweep rate values up to 75 mV/s (zone I), the slope approaches unity as predicted for an adsorbed species with thin-layer behavior [18][19][20]. For values of sweep rates from 100 to 1000 mV/s (zone III), the slope approaches 0.5, indicating semi-infinite diffusion behavior [8,[11][12][13][19][20][21].…”

“…At higher sweep rates such as 200 and 500 mV/s, both film electroactivity and stability begin again to decrease. Moreover, the potential peak separation of the film redox response ( E p ) decreases from 0.110 to 0.056 V as sweep rate ( ) increases from 25 to 100 mV/s, indicating the reduction in the film resistance [18], increasing sweep rate up to 500 mV/s accompanied by an increase in E p and consequently a more resistive film. It can be concluded that a sweep rate of 100 mV/s is the most suitable one for the production of electroactive, stable and less resistive film.…”

“…Moreover, the separation between the anodic and cathodic peak potentials ( E p ) of the redox film response decreases as the monomer concentration in the preparation medium increases from 5 × 10 −4 to 10 −3 mol/L due to the improvement of the resulting film conductivity. Increasing the monomer concentration to 5 × 10 −3 mol/L increases the film resistance [18].…”

“…Lower sweep rates than 100 mV/s are not suitable because these time-consuming sweep rates increase the chance for the film to adsorb a non-conductive, brittle massive deposit from the electrolytic solution. This layer prevents the further deposition of the active thickness and increases the film resistance [8][9][10][11][12][13]18]. …”