DI-UMONS : Dépôt institutionnel de l’université de Mons

Recherche transversale
(titres de publication, de périodique et noms de colloque inclus)
2009-01-21 - Article/Dans un journal avec peer-review - Anglais - 11 page(s)

Abbel R., Grenier C., Pouderoijen M.J., Stouwdam J.W., Leclère Philippe , Sijbesma R.P., Meijer E.W., Schenning A.P.H.J., "White-Light Emitting Hydrogen-Bonded Supramolecular Copolymers Based on pi-Conjugated Oligomers" in Journal of the American Chemical Society, 131, 2, 833-843

  • Edition : American Chemical Society, Washington (DC)
  • Codes CREF : Chimie des surfaces et des interfaces (DI1327)
  • Unités de recherche UMONS : Chimie des matériaux nouveaux (S817)
  • Instituts UMONS : Institut de Recherche en Science et Ingénierie des Matériaux (Matériaux)
Texte intégral :

Abstract(s) :

(Anglais) Three different p-conjugated oligomers (a blue-emitting oligofluorene, a green-emitting oligo(phenylene vinylene), and a red-emitting perylene bisimide) have been functionalized with self-complementary quadruple hydrogen bonding ureidopyrimidinone (UPy) units at both ends. The molecules self-assemble in solution and in the bulk, forming supramolecular polymers. When mixed together in solution, random noncovalent copolymers are formed that contain all three types of chromophores, resulting in energy transfer upon excitation of the oligofluorene energy donor. At a certain mixing ratio, a white emissive supramolecular polymer can be created in solution. In contrast to their unfunctionalized counterparts, bis-UPy-chromophores can easily be deposited as smooth thin films on surfaces by spin coating. No phase separation is observed in these films, and energy transfer is much more efficient than in solution, giving rise to white fluorescence at much lower ratios of energy acceptor to donor. Light emitting diodes based on these supramolecular polymers have been prepared from all three types of pure materials, yielding blue, green, and red devices, respectively. At appropriate mixing ratios of these three compounds, white electroluminescence is observed. This approach yields a toolbox of molecules that can be easily used to construct p-conjugated supramolecular polymers with a variety of compositions, high solution viscosities, and tuneable emission colors.

Notes :
  • (Anglais) Publié en ligne le 18 décembre 2008
Identifiants :
  • DOI : 10.1021/ja807996y