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Baibarac, M., Baltog, I., Daescu, M., Lefrant, S. & Chirita, P. (2016) Optical evidence for chemical interaction of the polyaniline/fullerene composites with N-methyl-2-pyrrolidinone. J. Mol. Struct. 1125 340–349.
Added by: Richard Baschera (2016-10-31 10:20:35) Last edited by: Richard Baschera (2016-10-31 10:28:22) |
| Type de référence: Article DOI: 10.1016/j.molstruc.2016.07.001 Numéro d'identification (ISBN etc.): 0022-2860 Clé BibTeX: Baibarac2016a Voir tous les détails bibliographiques  |
Catégories: INTERNATIONAL, PMN Mots-clés: buckminsterfullerene, cadmium-sulfide, conjugated polymers, doped polyaniline, enhanced raman-scattering, Fullerene, fullerene c-60, photoinduced electron-transfer, photoluminescence, polyaniline, SERS spectroscopy, spectroscopy, thin-films Créateurs: Baibarac, Baltog, Chirita, Daescu, Lefrant Collection: J. Mol. Struct. |
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| Résumé |
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Surface enhanced Raman scattering (SERS) spectroscopic studies reveal a particular chemical interaction of the polyaniline/fullerene (PANI/C-60) composite with N-methyl-2-pyrrolidinone (NMP). The chemical polymerization of aniline in the presence of sulfuric acid, potassium dichromate and fullerene has been used for the preparation of the PANI/C-60 composite. The polymerization reaction involves a doping of PANI with C-60 anion radicals. The interaction of the composite with NMP leads to a de-doping of PANI that involves a transformation of leucoemeraldine salt (LS) repeating units into leucoemeraldine base (LB). Additionally, a gradual increasing in the intensity of the Raman line at 1452 cm(-1) associated to the A(g)(2) pentagonal pinch mode of fullerene and a decrease in the intensity of the Raman lines of PANI are reported. This change arises from the formation of a charge-transfer complex C-60-NMP. The subsequent chemical treatment of PANI-LB with FeCl3 leads to the formation PANI-emeraldine salt. An inhibition of the transformation of PANI doped with C-60 anion radicals into a PANI-LB and the C-60-NMP charge transfer complex in the presence of CdS particles dispersed in NMP is demonstrated by SERS spectroscopy. (C) 2016 Elsevier B.V. All rights reserved.
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