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The First Products of Aniline Oxidation – SERS Spectroelectrochemistry
Author(s) -
Morávková Zuzana,
Dmitrieva Evgenia
Publication year - 2019
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201802878
Subject(s) - aniline , polyaniline , oligomer , phenazine , raman spectroscopy , context (archaeology) , chemistry , bifunctional , polymer chemistry , polymer , materials science , photochemistry , combinatorial chemistry , organic chemistry , polymerization , paleontology , physics , optics , catalysis , biology
There are different opinions on the first products of aniline oxidation throughout the scientific community. While electrochemists basically accept only linear oligomers with repeating units joint in para positions, chemists have proposed formation of various branched and polycyclic oligomers. It was also suggested that one of these structures, N‐phenyl‐phenazinium cation, is responsible for the adherence of polyaniline films to substrates. In this work, a surface enhanced Raman spectroscopic and spectroelectrochemical analysis of the species adsorbed onto gold surface in aniline‐containing solution at pH 1 and 5 is presented. The influence of the pH value on the oligomer structure is declared. The results are discussed in the context of linear and branched/phenazine‐like aniline oligomers.