Said, H. A., Ayachi, S., Chefia, I., Wery, J. & Alimi, K. (2011) Optical and Vibrational Studies on Single Walled Carbon Nanotubes/Short Oligo-Para-Methoxy-Toluene Composite. J. Appl. Polym. Sci. 122 1889–1897.
Added by: Laurent Cournède (2016-03-10 21:32:19)
|Type de référence: Article
Numéro d'identification (ISBN etc.): 0021-8995
Clé BibTeX: Said2011
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Mots-clés: Carbon nanotube, Composites, Diazonium salts, electrochemical reduction, films, functionalization, infrared spectroscopy, light-emitting-diodes, nanocomposites, photoluminescence, pi-conjugated oligomers, pi-stacking, polymer, ppv, raman-scattering
Créateurs: Alimi, Ayachi, Chefia, Said, Wery
Collection: J. Appl. Polym. Sci.
Consultations : 15/494
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In a solution state, an oligophenylene prepared by electrochemical oxidation of para-methoxy-toluene exhibited luminescence in the violet-to-blue region. However, in a solid state, a clear red shift was observed as a signature of a supramolecular pi-stacking interaction between oligomer chains. In a de-doped state, by chemical reduction, a fine structure in the form of two peaks was observed and luminescence intensity was strongly improved. When mixed with single walled carbon nanotubes (SWNTs), a quenching in the luminescence intensity accompanied by a slight blue shift of the PL peak of the nanocomposite was observed. This implies the shortening of the oligomer's effective pi-conjugation length caused by the added amount of SWNTs. A charge transfer in the photo-excited state was also noted. The interaction taking place between the two materials was supported by optical infrared absorption and Raman scattering measurements and then a functionalizing mechanism was proposed. (C) 2011 Wiley Periodicals, Inc. J Appl Polym Sci 122: 1889-1897, 2011
Added by: Laurent Cournède