Artículo
Bonazzola, C.; Calvo, E.J.; Nart, F.C. "A fourier transform infrared reflection-absorption spectroscopy study of redox polyelectrolyte films" (2003) Langmuir. 19(13):5279-5286
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Abstract:
Self-assembled polyelectrolyte multilayer films comprised of poly(allylamine) derivatized with an Os-(bpy)2CIPyCH- complex (PAH-Os), and poly(vinylsulfonate), PVS, or poly(styrensulfonate), PSS, have been studied by Fourier transform infrared reflection-absorption spectroscopy. The infrared absorbances of the characteristic SO3-, CH2, NH3+, and aromatic bipyridine and pyridine groups have been characterized, and their intensity increases with the number of self-assembled layers and redox charge. The characteristic infrared signatures are the 1040 cm-1 band assigned to the aromatic ligands in the osmium complex (v(Py)), PAH-Os, and the 1040 cm-1 (vs(SO3-)) and 1213 cm-1 (va(SO3-)) bands for SO3 groups in PVS. The vs(SO3-) vibrational mode of PVS senses the local NH3+ environment of the cationic PAH-Os resulting in a band shift of 22 cm-1 for the first polyallylamine layer. Subtractively normalized Fourier transform infrared spectroscopy during the oxidation of the Os centers in the (PAH-Os)n(PVS)m multilayer reveals that different vibrational modes of bipyridine ligands in the osmium redox center of PAH-Os and the sulfonate groups of PVS are affected by charge-ligand electrostatic interaction and dipole reorganization in the multilayers.
Registro:
| Documento: | Artículo |
| Título: | A fourier transform infrared reflection-absorption spectroscopy study of redox polyelectrolyte films |
| Autor: | Bonazzola, C.; Calvo, E.J.; Nart, F.C. |
| Filiación: | Depto. de Quimica Inorganica, Fac. de Cie. Exactas y Naturales, Universidad de Buenos Aires, Pabellon II, Ciudad Universitaria, AR-1428 Buenos Aires, Argentina Instituto de Quimica de Sao Carlos, Universidade de Sao Paulo, C.P. 780, 13560-970 Sao Carlos, SP, Brazil |
| Palabras clave: | Absorption; Electrostatics; Fourier transform infrared spectroscopy; Molecular vibrations; Multilayers; Osmium compounds; Oxidation; Redox reactions; Self assembly; Polyallylamine; Polyelectolyte multilayer films; Polystyrensulfonate; Polyvinylsulfonate; Redox charge; Polyelectrolytes |
| Año: | 2003 |
| Volumen: | 19 |
| Número: | 13 |
| Página de inicio: | 5279 |
| Página de fin: | 5286 |
| DOI: | http://dx.doi.org/10.1021/la026528u |
| Título revista: | Langmuir |
| Título revista abreviado: | Langmuir |
| ISSN: | 07437463 |
| CODEN: | LANGD |
| Registro: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_07437463_v19_n13_p5279_Bonazzola |
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Citas:
---------- APA ----------
Bonazzola, C., Calvo, E.J. & Nart, F.C. (2003) . A fourier transform infrared reflection-absorption spectroscopy study of redox polyelectrolyte films. Langmuir, 19(13), 5279-5286.http://dx.doi.org/10.1021/la026528u
---------- CHICAGO ----------
Bonazzola, C., Calvo, E.J., Nart, F.C. "A fourier transform infrared reflection-absorption spectroscopy study of redox polyelectrolyte films" . Langmuir 19, no. 13 (2003) : 5279-5286.http://dx.doi.org/10.1021/la026528u
---------- MLA ----------
Bonazzola, C., Calvo, E.J., Nart, F.C. "A fourier transform infrared reflection-absorption spectroscopy study of redox polyelectrolyte films" . Langmuir, vol. 19, no. 13, 2003, pp. 5279-5286.http://dx.doi.org/10.1021/la026528u
---------- VANCOUVER ----------
Bonazzola, C., Calvo, E.J., Nart, F.C. A fourier transform infrared reflection-absorption spectroscopy study of redox polyelectrolyte films. Langmuir. 2003;19(13):5279-5286.http://dx.doi.org/10.1021/la026528u
