Electropolymerization of N-methylanthranilic acid and spectroelectrochemical characterization of the formed film

A1 Originalartikel i en vetenskaplig tidskrift (referentgranskad)


Interna författare/redaktörer


Publikationens författare: Maija Blomquist, Tom Lindfors, Rose-Marie Latonen, Johan Bobacka
Förläggare: Elsevier
Publiceringsår: 2009
Tidskrift: Synthetic Metals
Volym: 159
Nummer: 1-2
Artikelns första sida, sidnummer: 96
Artikelns sista sida, sidnummer: 102


Abstrakt

The electropolymerization of N-methylanthranilic acid (NMAA) is reported in this paper. The monomer is substituted both at ortho- and N-position
and, to the best of our knowledge, it has not been previously
electropolymerized. Electropolymerization of NMAA was done on glassy
carbon and optically transparent (indium) tin oxide electrodes. The
obtained films, which are probably of an oligomeric nature (oligoNMMA),
were characterized with cyclic voltammetry (CV), in situ UV–vis and Raman spectroscopy, ex situ FTIR spectroscopy and scanning electron microscopy (SEM).Our results show that NMAA can be electropolymerized as thin films in 1.0 M HCIO(4), but the oxidation and reduction peak currents in the CVs indicate that the formed oligoNMAA films are thinner than poly(N-methylaniline) or poly(N-butylaniline) films prepared under similar conditions. The CV and UV-vis measurements confirm that oligoNMAA have three oxidation states like suggested in the redox scheme of substituted polyanilines. The Raman spectra of oligoNMAA also verify that more quinoid units are formed at higher potentials in accordance with the redox scheme. The ex situ FTIR measurement proves that covalently attached carboxylic acid groups are present in the film structure and attached to the oligoNMAA backbone.


Nyckelord

cyclic voltammetry, Electropolymerization, FTIR spectroscopy, poly(N-methylanthranilic acid), Raman spectroscopy, UV-vis

Senast uppdaterad 2019-06-12 vid 04:00