Influence of the counter ion on the properties of organic and inorganic acid doped polyaniline and their Schottky diodes

Fabrication of Poly(o/m-Toluidine)–SiC/Zinc Bilayer Coatings and Evaluation of Their Corrosion Resistances

“…The peaks at 1116 and 818 cm −1 reveal C-H bending of quinoid and benzenoid rings. Furthermore, the peak at 2922 cm −1 is also ascribed to C-H stretching in the methyl group of DBSA [23], with the result indicating that DBSA has been doped in POT chains. The FTIR spectra of PMT shows the main characteristic peaks have insignificantly changed.…”

Electropolymerized polyaniline: A promising hole selective contact in organic photoelectrochemical cells

“…[4] The current density increases with both the number of cycles and the concentration of monomer as shown in Figure 2(b), which relates to the growth of the electroactive polyaniline films on the ITO substrate, directly increasing the thickness of the PANI layer during the successive cycles performed [27], in good correlation with the information provided by Table 1 can probably be related to the π-π * transition centered on the benzoid rings, and a second broad band from 500 nm to 700 nm, can be assigned to the polaron/bipolaron transitions caused by the interband charge transfer from benzoid to quinoid rings confirmed the doped polyaniline state. [26,29] On the other hand, according to Nekrasov et al, [30] the intense band at 350 nm (3.3 eV) is characteristic of the protonated forms of emeraldine salt, while the large one located from 500 nm to 700 nm, which appears when the potential range of electropolymerization increases up to 0.6 V, is a superposition of three important bands marked at ~ 570, ~ 665 (1.86 eV) , and 755 nm. These latter bands are relative to donoracceptor interaction between the quinoid fragments and the counter anion (which is HSO 4 -in our study), exciton transitions in quinoid rings and the localized polarons, respectively.…”

Preparation of Poly(o-ethylaniline)-SiC/Zinc Bilayer Coatings and Study of Its Corrosion Resistance Properties

“…The peak observed at 2928 cm −1 is ascribed to the C-H stretching in the methyl of DBSA, the result indicates that DBSA has been doped in the POE chains. 32 For PSC, it can be observed that all peaks related to POE in the composite have been shifted to lower wavenumbers, which indicates the presence of some interactions between POE and SiC nanoparticles and also implies the introduction of SiC nanoparticles does not affect the chemical structure of POE. The characteristic peak of SiC appearing at 816 cm −1 has turned to be weakened in the composite or overlapped with POE, these results reveal that SiC nanoparticles are effectively covered by POE molecules.…”