Electrosynthesis and characterisation of poly(N-methylaniline) in organic solvents

A correlation of electrochemical and spectroelectrochemical properties of poly(o-toluidine)

“…In contrast, the band present at 1369 cm −1 decreases after E SCE = 0.60 V. During the anodic sweep a new band of weak intensity, around 1490 cm −1 , appears when extending the potential to E SCE = 0.40 V. This signal is observed in the potential region between E SCE = 0.20-0.60 V where the emeraldine state of POT exists and thus can be assigned to the C N stretching of the semiquinone structure. Similar observations have been reported elsewhere [34][35][36][37]. At E SCE = 0.80 V the intensity of this band is greatly diminished.…”

“…The main feature in our spectra of POT, obtained with red laser light ( ex = 647.1 nm), is the unusual intensity dependence of the band located at 1630 cm −1 on the applied potential and notable upshift in frequency of the band from 1630 to 1640 cm −1 when the potential passes E SCE = 0.60 V. Rather similar observations have recently been reported by Wei et al [37] for the band at 1616 cm −1 in the Raman spectra of poly(N-methylaniline) in the range of E Ag/AgCl = 0.42-0.82 V, studied with laser light at lambdaex (symbols and subscript) = 780 nm. However, they did not provide any explanation for this tendency of the band.…”

“…The band at 1597 cm −1 grows in intensity with increasing potential showing a shift to 1592 cm −1 at the highest potential examined and has been assigned to the C C stretching vibrations of quinoid-like rings [35][36][37]. The very strong band at 1630 cm −1 is a striking feature of the Raman spectra of POT needing special attention.…”

In situ conductance and in situ ATR-FTIR study of poly(N-methylaniline) in aqueous solution

“…2, the conductance is shown as a function of potential during electrochemical doping of a PNMA film in aqueous solution containing 1.0 M CF 3 COOH. PNMA is considered to exist in three redox states [28], i.e. the fully reduced leucoemeraldine (LE) form, the only conducting emeraldine (E) form and the fully oxidized pernigraniline (PN) form.…”

Inhibition effect of some aromatic amines on copper electrodeposition from acidic baths

“…On the one hand, the electrophilic attack on the nitrogen atom is sterically hindered by the voluminous substituents and on the other hand, the insertion of side groups increases the solubility of the oligomeric products [31]. Studies on the electropolymerization mechanism of MA in aqueous solutions and aqueous-organic solvent mixtures have shown large amounts of soluble reaction products [32][33][34].…”