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

doi:10.1016/s0379-6779(98)00814-5

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

National Renewable Energy Laboratory

Research output: Contribution to journal › Conference article › peer-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 language	English
Pages (from-to)	631-632
Number of pages	2
Journal	Synthetic Metals
Volume	101
Issue number	1-3
DOIs	https://doi.org/10.1016/s0379-6779(98)00814-5
Publication status	Published - Jan 1 1999
Event	Proceedings of the 1998 International Conference on Science and Technology of Synthetic Metals (ICSM-98) - Montpellier, France Duration: Jul 12 1998 → Jul 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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title = "The influence of solvent dielectric constant on the photophysical properties of cyano and alkoxy substituted phenylene vinylene model compounds",

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.",

keywords = "Photoluminescence, Poly (phenylene vinylene) and derivatives, UV-Vis absorption",

author = "{De Souza}, {M. M.} and G. Rumbles and Samuel, {I. D.W.} and Moratti, {S. C.} and Holmes, {A. B.}",

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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, G.

AU - Samuel, I. D.W.

AU - Moratti, S. C.

AU - Holmes, A. B.

PY - 1999/1/1

Y1 - 1999/1/1

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

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