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 language | English |
|---|---|
| Pages (from-to) | 631-632 |
| Number of pages | 2 |
| Journal | Synthetic Metals |
| Volume | 101 |
| Issue number | 1-3 |
| Publication status | Published - 1999 |
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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 journal › Article
}
TY - JOUR
T1 - The influence of solvent dielectric constant on the photophysical properties of cyano and alkoxy substituted phenylene vinylene model compounds
AU - De Souza, M. M.
AU - Rumbles, Gary
AU - Samuel, I. D W
AU - Moratti, S. C.
AU - Holmes, A. B.
PY - 1999
Y1 - 1999
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.
KW - Photoluminescence
KW - Poly (phenylene vinylene) and derivatives
KW - UV-Vis absorption
UR - http://www.scopus.com/inward/record.url?scp=0032590840&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0032590840&partnerID=8YFLogxK
M3 - Article
VL - 101
SP - 631
EP - 632
JO - Synthetic Metals
JF - Synthetic Metals
SN - 0379-6779
IS - 1-3
ER -