Ben Amor, S., Said, A. H., Chemek, M., Massuyeau, F., Wery, J., Faulques, E., Alimi, K. & Roudesli, S. (2012) Synthesis and Optical Study of a New Oligophenylene. Polymers, 4 1226–1241.
Added by: Laurent Cournède (2016-03-10 21:28:39)
|Type de référence: Article
Numéro d'identification (ISBN etc.): 2073-4360
Clé BibTeX: BenAmor2012
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Mots-clés: bandgap, conjugated polymers, conjugated systems, derivatives, oligophenylenes, photoluminescence, polymers, polythiophene
Créateurs: Alimi, Ben Amor, Chemek, Faulques, Massuyeau, Roudesli, Said, Wery
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Indice de consultation : 3%
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A new substituted oligophenylene was prepared by the Knoevenagel condensation of 4-methoxybezaldehyde with a functionalized oligophenylene (OMPA). The latter was obtained by (4-methoxy phenyl) acetonitrile electrochemical oxidation. The resulting modified oligomer was characterized by various spectroscopic techniques: NMR, FTIR and UV. The thermal study showed that the modified material exhibited a lower thermal stability compared with OMPA. Finally, the optical study revealed that in solution, the emission was red-shifted when compared with the non-modified oligomer emission and that the optical gap changed from 3.1 eV to 2.75 eV. In thin layer solid state, photoluminescence was again red-shifted by 120 nm, which is probably due to an interaction between the oligomer chains. In addition, a transient photoluminescence study was undertaken for the synthesized materials. It showed that the lifetimes of the photo-generated species were shortened by the conjugation extension in the modified oligomer and by the inter-chain interactions in the solid state.
Added by: Laurent Cournède