Modulating the electronic properties of pendant groups through the redox switching reaction of a conjugated polymer

<b>Electrochemical synthesis and spectroscopic characterization of poly(N-phenylpyrrole) coatings in an organic medium on iron and platinum electrodes</b>

“…The main bands of the monomer and the polymer were obtained, respectively, on KBr pallet and on Pt and Fe electrodes ( Table 1). The assignments are in good agreement with those already found in the literature [5,14,[26][27][28]. The two strong bands, visible at 1015 and at 719 cm -1 in the monomer spectrum and characteristic of unsubstituted pyrrole 4-adjacent hydrogen vibrations (ν C-H ), disappeared in those of the polymers.…”

“…The two strong bands, visible at 1015 and at 719 cm -1 in the monomer spectrum and characteristic of unsubstituted pyrrole 4-adjacent hydrogen vibrations (ν C-H ), disappeared in those of the polymers. In addition to the band observed near 1030 cm -1 , assigned to the C-H deformation vibration for 2-adjacent hydrogen in the polymer spectra, proved the polymerization in the 2,5 positions [26]. According to the vibrations found in the spectra and shown in Table 1, we can conclude that films obtained in Pt and Fe electrodes have the same structure.…”

Synthesis and Electropolymerization of New Phenylene-Substituted Dipyrridyls: Electrochemical and Spectroscopic Characterization

“…The FT-IR data of the studied poly (PhDPy), of the corresponding monomer and of N-PhPy for comparison purposes, as well as the attributions of the main IR bands, are presented in Table-2. For the assignments of the bands, we compared our IR data with previous works on analogous compounds such as un-substituted and substituted N-PhPys and their respective polymers 26,27,29,30,[33][34][35] . The comparative study of the polymers and corresponding monomers, in particular the analysis of the polymerization-induced modifications (bands disappearance, shifts or intensity variation) gave information about the coupling sites of the polymer chains.…”

New synthesis routes, characterization, electrochemical and spectral properties of p-substituted N-phenylpyrroles. Substituent effects

“…For this reason, a number of publications have been devoted to a study of the effect of the phenyl group on the properties of the corresponding polymer [poly(NPPY)]. [4][5][6][7] For instance, Mangeney et al 4 have investigated the role of a conjugated link in poly(NPPY) between the polypyrrole backbone and the phenyl group. These authors showed that it was possible to obtain polymers with conjugated grafted groups, leading to a new class of materials in which the π-electron density of the active centre might be adjusted without synthesis.…”

“…Also, the redox switching reaction of conducting polymers was used to modulate the electronic properties of benzene nuclei grafted on the polypyrrole backbone. 5 Moreover, recently, Diaw et al 6,7 have optimized the experimental conditions to electrosynthesize poly-NPPY films in organic and micellar media, and have reported that the presence of traces of pyrrole, during the electropolymerization process, can improve several physicochemical properties of poly-NPPY films.…”