INQUIMAE 12526
INSTITUTO DE QUIMICA, FISICA DE LOS MATERIALES, MEDIOAMBIENTE Y ENERGIA
Unidad Ejecutora - UE
artículos
Título:
PM-IRRAS Spectoelectrochemistry of hexacyano-ferrate films in layer-by-layer polyelectrolyte multilayers
Autor/es:
VILLALBA, MATIAS A.; LUCILA P. MÉNDEZ DE LEO; ERNESTO J. CALVO
Revista:
ChemElectroChem
Editorial:
Wiley
Referencias:
Año: 2014 vol. 1 p. 195 - 199
ISSN:
2196-0216
Resumen:
In situ polarization modulation infrared reflection absorption
spec-troscopy (PM-IRRAS) under potential control has been used to study
self-assembled layer-by-layer poly(allylamine) and poly(acrylic acid)
multilayers on conductive substrates containing hexacyanoferrate redox
system. Two systems were examined, which differ in the way the redox
complex is entrapped in the LbL polyelectrolyte multilayer: In system I
the LbL polyelectrolyte multilayer self-assembled by alternate immersion
in poly(allylamine), PAH, and poly (acrylic acid), PAA, respectively
was then exchanged in 2 mM K3Fe(CN)6 solution of pH 3.5 for 30 minutes
and then thoroughly rinsed with water. In system II 2 mM K3Fe(CN)6 was
complexed with poly(allylamine) prior to self-assembly with poly(acrylic
acid). PM-IRRAS reported the potential dependence of vibrational modes
for the polyelectrolyte backbones and CN stretching modes which are
sensitive to the redox charge in the iron center.
