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

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

Research output: Contribution to journalArticle

8 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
Publication statusPublished - 1999

Fingerprint

Permittivity
alkyl compounds
permittivity
Quantum yield
Charge transfer
Photoluminescence
indication
emission spectra
Substitution reactions
charge transfer
substitutes
photoluminescence
life (durability)
shift
estimates
alkoxyl radical

Keywords

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

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Materials Chemistry
  • Polymers and Plastics

Cite this

The influence of solvent dielectric constant on the photophysical properties of cyano and alkoxy substituted phenylene vinylene model compounds. / De Souza, M. M.; Rumbles, Gary; Samuel, I. D W; Moratti, S. C.; Holmes, A. B.

In: Synthetic Metals, Vol. 101, No. 1-3, 1999, p. 631-632.

Research output: Contribution to journalArticle

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AU - Holmes, A. B.

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N2 - 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.

AB - 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.

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KW - UV-Vis absorption

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