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Titolo:
Spectroscopic investigation on polymer films obtained by oxidation of o-phenylenediamine on platinum electrodes at different pHs
Autore:
Losito, I; De Giglio, E; Cioffi, N; Malitesta, C;
Indirizzi:
Univ Bari, Dipartmento Chim, I-70126 Bari, Italy Univ Bari Bari Italy I-70126 Bari, Dipartmento Chim, I-70126 Bari, Italy
Titolo Testata:
JOURNAL OF MATERIALS CHEMISTRY
fascicolo: 7, volume: 11, anno: 2001,
pagine: 1812 - 1817
SICI:
0959-9428(2001)11:7<1812:SIOPFO>2.0.ZU;2-0
Fonte:
ISI
Lingua:
ENG
Soggetto:
RAY PHOTOELECTRON-SPECTROSCOPY; QUARTZ-CRYSTAL MICROBALANCE; ORGANIC SALT ELECTRODES; FLOW-INJECTION ANALYSIS; FREE GLUCOSE BIOSENSOR; AMPEROMETRIC BIOSENSOR; ELECTROCHEMICAL IMMOBILIZATION; CHEMICAL DERIVATIZATION; LADDER POLYMER; POLY(O-PHENYLENEDIAMINE);
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Engineering, Computing & Technology
Citazioni:
45
Recensione:
Indirizzi per estratti:
Indirizzo: Losito, I Univ Bari, Dipartmento Chim, Via E Orabona 4, I-70126 Bari, Italy Univ Bari Via E Orabona 4 Bari Italy I-70126 -70126 Bari, Italy
Citazione:
I. Losito et al., "Spectroscopic investigation on polymer films obtained by oxidation of o-phenylenediamine on platinum electrodes at different pHs", J MAT CHEM, 11(7), 2001, pp. 1812-1817

Abstract

An investigation on the structure of poly(o-phenylenediamine) (PPD) films,obtained by electropolymerization of oPD (1,2-diaminobenzene) on platinum at different pH values, was performed by X-ray Photoelectron Spectroscopy (XPS). XPS could be used as a "bulk" technique for PPD films analysis, due to their extremely low thickness. The presence of different functionalities, likeprimary/secondary aminic, iminic and, as minor species, oxygenated groups (carbonyl, oximes) was suggested by curve fitting of carbon (C1s) and nitrogen (N1s) XP spectra. The use of chemical derivatization reactions (CD-XPS)confirmed the presence of primary aminic and hydroxy groups, showing that NH2 groups are present in the PPD structure even at low pH values, though their amount increases on increasing the pH of polymerization. Optical spectroscopy in the visible region was also performed on the electrolytic solutions at the end of polymerization, suggesting a higher conjugation of the oPD oligomers at low pH, which indirectly confirms XPS findingson the presence of NH2 groups in the polymer.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 28/09/20 alle ore 09:36:20