Conducting polyaniline prepared in the solutions of formic acid: Does functionalization with carboxyl groups occur?

Synthesis and characterization of conjugated PVA/PANi blend doped with functionalized Graphene for Thermoelectric Applications

“…A sharp peak at 1717.87 cm -1 was assigned to the C=C stretching of the quinoid ring (N=Q=N)), the OH bending peak appeared at ≈1640 cm -1 , the peak appeared at 1470 cm -1 denotes the C=C stretching vibration of the benzenoid ring (N-B-N)), at the wavenumber ≈1240 cm -1 , the C -N stretching of the secondary aromatic ring appeared, where the aromatic C-H in-plane bending vibrations was shown at ≈1100 cm -1 , and at 804.32 cm -1 the aromatic C-H out-of-plane bending vibrations is obtained in the spectrum. These peaks match well with those mentioned in previous works [23][24][25]. The band at ≈ 1753 cm -1 corresponds to symmetric stretching vibrations of the C=O bond.…”

Highly Enhanced Adsorption For The Removal of Hg (II) From Aqueous Solution By Co-Polymerized Al2O3 Nanocomposites Fabricated By Improved Sol-Gel Combustion Route: Synthesis, Adsorption Kinetics & Isotherm Modelling

“…The structure of PANAA copolymer was confirmed by using FT-IR spectroscopy Fig. 9: the band at 1586.66 cm -1 and 1493.75 were due to the C = C vibrations of quinoid and benzenoid ring stretching of the aromatic ring through the copolymer backbone [71][72][73]; the band at 1296.45-1495 cm -1 was due to the C ̶ N stretching vibrations of the secondary aromatic amine (quinoid and benzenoid sequence) ; The strong band at 1150 cm -1 is a characteristic for emeraldine salt (doped with chloride ion). The bands at1140 cm -1 and 829 cm -1 were due to the CH out-of-plane and the stretching in the BBB unit, respectively.…”

Effect of the morphology of films of polyaniline derivatives poly-2-[(2E)-1‑methyl-2‑butene-1‑yl]aniline and poly-2-(cyclohex-2‑en-1‑yl)aniline on sensory sensitivity to humidity and ammonia vapors

“…Polyaniline is a conductive polymer with potential applications in the field of biomedical engineering. Using IR spectroscopy and electrical conductivity measurements, it was shown that oxidation in formic acid solutions is provided by samples with moderate electrical conductivity of the order of 0.01-0.1 S cm −1 [21]. Despite numerous advantages of PANI as a sensitive material in resistive sensors, a large number of studies are being conducted to improve its sensitivity, selectivity and response time by changing the structure, copolymerization, varying the dopant and introducing various components into the conductive polymer [22 -24].…”