The influence of solvent dielectric constant on the photophysical properties of cyano and alkoxy substituted phenylene vinylene model compounds

M. M. De Souza, G. Rumbles, I. D.W. Samuel, S. C. Moratti, A. B. Holmes

Research output: Contribution to journalConference articlepeer-review

9 Citations (Scopus)

Abstract

We report time-resolved and steady-state photoluminescence studies of three substituted phenylene vinylene model compounds in solvents of different dielectric constant. We note that the compound containing both the alkoxy and cyano substitution exhibits a drop in the quantum yield relative to the monosubstituted alkoxy or alkyl compounds. In addition, the emission spectrum loses structure and shifts to the red in high dielectric constant solvent. Estimates of the non-radiative lifetime of the emitting species in this model compound are markedly longer and we interpret this as an indication that the emitting state has a high degree of charge-transfer character.

Original languageEnglish
Pages (from-to)631-632
Number of pages2
JournalSynthetic Metals
Volume101
Issue number1-3
DOIs
Publication statusPublished - Jan 1 1999
EventProceedings of the 1998 International Conference on Science and Technology of Synthetic Metals (ICSM-98) - Montpellier, France
Duration: Jul 12 1998Jul 18 1998

Keywords

  • Photoluminescence
  • Poly (phenylene vinylene) and derivatives
  • UV-Vis absorption

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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