Voltammetric Behavior of the System Nitrosobenzene-Phenylhydroxylamine at the Graphite Electrode.

Chemisorption of aromatic thiols onto a glassy carbon surface

“…(1)). The presence of this intermediate is confirmed by the pair of redox peaks centered at +0.30 V [21,22]. The anodic peak of this pair corresponds to the oxidation of 4-hydroxylaminothiophenol to 4-nitrosothiophenol and the cathodic peak represents the inverse reaction (Eq.…”

“…These compounds were chosen because they have a strong nucleophilic character [16] and the redox chemistry of their nitrogen group [17][18][19][20][21][22][23][24][25][26][27][28] allows the quantification of their surface coverage and also a comparison with similar diazonium compounds that have been reported. Cyclic voltammetry and XPS measurements of the glassy carbon surface after its immersion into a 4-nitrothiophenol or 4-aminothiophenol solution were used to determine if these compounds are chemisorbed.…”

Size control and electrocatalytic properties of chemically synthesized platinum nanoparticles grown on functionalised HOPG

“…is irreversible [64] and therefore, the redox wave at $0.3 V corresponds to the Ar-NHOH/Ar-NO couple [53,[68][69][70]. Full reduction to an -NH 2 termination was achieved by reaction with Sn(II) chloride, and no features related to the Ar-NHOH/Ar-NO couple [53] were observed (Fig.…”

Polarographic measurement of relative strengths of Broensted acids in pyridine. Dispersion and solvation effects in acid-base equilibriums. Analysis of Broensted acid mixtures

“…The HMDE consisted of one drop of mercury delivered from the DME and hung from the lower end of a glass tube into which a 0.4-mm platinum wire was sealed. The 4-mm diameter PGE was prepared and used as described (33). A triangular Controlled Potential Coulometry.…”