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2005-03-24 - Article/Dans un journal avec peer-review - Anglais - 9 page(s)

Sancho Garcia J.C., Brédas Jean-Luc , Beljonne David , Cornil Jérôme , Martinez-Alvarez R., Hanack M., Poulsen L., Gierschner J., Mack H.G., Egelhaaf H.J., Oelkrug D., "Design of p-Conjugated Organic Materials for One-Dimensional Energy Transport in Nanochannels" in Journal of Physical Chemistry B, 109, 11, 4872-4880

  • Edition : American Chemical Society, Washington (DC)
  • Codes CREF : Physique de l'état solide (DI1261), Chimie quantique (DI1321)
  • 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) Various end-substituted distyrylbenzenes have been synthesized to serve as guest molecules in inclusion compounds to promote efficient energy transport along one-dimensional channels. Their optical and photophysical properties have been characterized at both experimental and theoretical levels. All molecules display a large transition dipole moment between the ground state and lowest excited state and hence a short radiative lifetime (on the order of 1-2 ns). They also exhibit a large spectral overlap between the emission and absorption spectra, which enables efficient energy transport between molecules arranged in a head-to-tail configuration in nanochannels. Hopping rates on the order of 1012 s-1 are calculated at a full quantum-chemical level; this is much larger than the radiative lifetimes and opens the way for energy migration over large distances. Changes in the nature of the terminal substituents are found to modulate the optical properties weakly but to impact significantly the energy transfer rates.

Notes :
  • (Anglais) Publié en ligne le 24 février 2005
Identifiants :
  • DOI : 10.1021/jp045364i