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Baibarac, M., Nila, A., Baltog, I., Lefrant, S., Mevellec, J. Y., Quillard, S. & Humbert, B. (2017) Influence of single-walled carbon nanotubes enriched in semiconducting and metallic tubes on the electropolymerization of tetrabromo ortho-xylene: Insights on the synthesis mechanism of poly(ortho-phenylenevinylene). Eur. Polym. J. 88 109–125. 
Added by: Richard Baschera (2017-04-28 13:01:15)   Last edited by: Richard Baschera (2017-04-28 13:16:26)
Type de référence: Article
DOI: 10.1016/j.eurpolymj.2017.01.015
Numéro d'identification (ISBN etc.): 0014-3057
Clé BibTeX: Baibarac2017a
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Catégories: INTERNATIONAL, PMN
Mots-clés: Composites, Cyclic voltammetry, derivatives, films, optical-properties, photoluminescence, Poly(ortho-phenylenevinylene), poly(p-phenylene vinylene), poly(para-phenylene vinylene), polymers, single-walled carbon nanotubes, vibrational properties
Créateurs: Baibarac, Baltog, Humbert, Lefrant, Mevellec, Nila, Quillard
Collection: Eur. Polym. J.
Consultations : 7/549
Indice de consultation : 2%
Indice de popularité : 0.5%
Résumé     
New composite materials based on single-walled carbon nanotubes effectively separated into semiconducting (S-SWNTs) and metallic tubes (M-SWNTs) and poly(ortho-phenylenevinylene) (POPV) were synthesized by the electrochemical polymerization of the alpha,alpha,alpha',alpha',-tetrabromo-o-xylene monomer onto the surface of Au supports covered with carbon nanotubes films. Using FTIR spectroscopy, an increase of the quinoid structure weight is highlighted when a charge transfer is induced to take place between the two constituents of the POPV/S-SWNT composite material. In addition, a down-shift of the Raman line belonging to POPV (from 530 cm-(1) to 515 cm(-1)), which was accoinpanied by an increase in relative peak intensity, is reported as a result of steric hindrance effects induced by the covalent bonding of POPV onto the S-SWNT surface. The non-covalent functionalization of M-SWNTs with POPV is demonstrated to occur by Raman scattering and FTIR spectroscopy. The photoluminescence (PL) spectrum of POPV exhibits two bands at 2.82 and 2.25 eV, which were assigned to the electronic emission transitions of macromolecular chains having 3 and 7-10 repeating units, respectively. We demonstrate that POPV photoluminescence quenching in the presence of M + S-SWNTs, M-SWNTs and S-SWNTs is achieved by tubes with chirality (14,7), (12,10) and (11,9), respectively. (C) 2017 Elsevier Ltd. All rights reserved.
  
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