Raman spectroelectrochemical study of electrodeposited polyaniline doped with polymeric sulfonic acids of different structuresстатья

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Дата последнего поиска статьи во внешних источниках: 26 декабря 2017 г.

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[1] Raman spectroelectrochemical study of electrodeposited polyaniline doped with polymeric sulfonic acids of different structures / A. A. Nekrasov, O. L. Gribkova, O. D. Iakobson et al. // Chemical Papers. — 2017. — Vol. 71, no. 2. — P. 449–458. Polyaniline (PANI) films were prepared by electrochemical polymerization of aniline on Pt-electrode in aqueous medium in the presence of polymeric sulfonic acids distinguished by different flexibility of the polymer chain: (1) poly(2-acrylamido-2-methyl-1-propanesulfonic acid) (PAMPSA, flexible chain); (2) poly(4-styrenesulfonic acid) (PSSA, flexible chain), (3) poly-4,40-(2,20-disulfoacid)- diphenylene-iso-phthalamide (i-PASA, semi-rigid chain); and (4) poly-4,40-(2,20-disulfoacid)-diphelylenetere- phthalamide (t-PASA, rigid chain). Raman spectroelectrochemical studies using 532 nm laser excitation were carried out in aqueous HCl. The conventional HCl-doped PANI films were also studied for comparison. The results allowed one to distinguish the potential-dependent vibrations belonging to PANI and potential-independent vibrations belonging to the polyacids. In addition, amide C=O vibration was separated in the spectra by comparing the results for amide-containing (PAMPSA, i-PASA, and t-PASA) and amide-free (PSSA) PANI-polyacid complexes. The films of PANI-polyacid complexes demonstrated increased content of radical cation moieties at low potentials compared to PANI–HCl films. [ DOI ]

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