Molecular origin of the temperature-dependent energy migration in a rigid-rod ladder-phenylene molecular host

Herbert Wiesenhofer*, Egbert Zojer, Emil J.W. List, Ullrich Scherf, Jean-Luc Bredas, David Beljonne

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

22 Scopus citations

Abstract

The molecular origin of the temperature-dependent emission lineshapes and linewidths in a model system of a rigid-rod ladder-phenylene molecular host, was analyzed. The investigated system consists of a five-ring ladder-type paraphenylene oligomer host incorporated into an inert polystyrene matrix doped with a molecular guest that has a high luminescence quantum yield. The temperature-dependent homogeneous broadening in the phenylene-based five-ring ladder-type paraphenylene oligomer host (5LOPP) has been rationalized in terms of coupling of the electronic excitations to specific low-frequency vibrational modes. The results show that this model provides an unambiguous correlation between the T-dependent spectral lineshapes and the diffusion dynamics.

Original languageEnglish (US)
Pages (from-to)310-314
Number of pages5
JournalAdvanced Materials
Volume18
Issue number3
DOIs
StatePublished - Feb 3 2006

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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