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2008-02-11 - Article/Dans un journal avec peer-review - Anglais - 7 page(s)

Van Averbeke Bernard, Beljonne David , Hennebicq E., "Energy Transport along Conjugated Polymer Chains: Through-Space or Through-Bond?" in Advanced Functional Materials, 18, 3, 492-498

  • Edition : Wiley-VCH Verlag, Weinheim (Germany)
  • Codes CREF : Spectroscopie [électromagnétisme, optique, acoustique] (DI1255)
  • 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) On the basis of a quantum-chemical description of the lowest singlet electronic excited states of bi-chromophoric model systems, we have disentangled the through-bond (TB) from the through-space (TS) contributions to the electronic interactions mediating energy hopping in rigid-rod conjugated polymers. While TB interactions lead to significant mixing between local and charge-transfer excitations in the ground-state (acceptor) configuration, this effect is reduced in the excited-state (donor) configuration as a result of the self-confinement induced by geometric relaxation phenomena. Thus, an improved Förster-type hopping model retaining only long-range TS contributions between donors and acceptors but accounting for excited-state delocalization among acceptors (possibly driven by TB interactions) appears as a minimal model to treat excitation transport along polymer chains.

Notes :
  • (Anglais) Publié en ligne le 12 février 2008
  • (Anglais) Lecture en ligne: http://onlinelibrary.wiley.com/doi/10.1002/adfm.200700574/pdf
Identifiants :
  • DOI : 10.1002/adfm.200700574