Photophysical characterization of trans-4,4′-disubstituted stilbenes

Vladislav Papper; Dina Pines; Gertz Likhtenshtein; Ehud Pines

doi:10.1016/S1010-6030(97)00234-7

Photophysical characterization of trans-4,4′-disubstituted stilbenes

Vladislav Papper, Dina Pines, Gertz Likhtenshtein, Ehud Pines

Department of Chemistry

Research output: Contribution to journal › Article › peer-review

83 Scopus citations

Abstract

Absorption and emission spectra of twenty trans-4,4′-disubstituted stilbenes have been measured in four solvents: cyclohexane (CH), chlorobenzene (CB), 2-butanone (methylethyl ketone, MEK) and dimethylsulfoxide (DMSO) at room temperature. Fluorescence quantum yields (Φ_f) and fluorescence lifetimes (τ_f) have been measured for these stilbenes. The lifetimes and quantum yields of fluorescence were found to be dependent on the donor-acceptor properties of the substituents and correlate with the Hammett σ-constants. In addition, we experimentally observed the appearance of a second emitting state which is close energetically to the lowest exited singlet state ¹t* in cases of strong donor-acceptor substituents in polar solvents.

Original language	English
Pages (from-to)	87-96
Number of pages	10
Journal	Journal of Photochemistry and Photobiology A: Chemistry
Volume	111
Issue number	1-3
DOIs	https://doi.org/10.1016/S1010-6030(97)00234-7
State	Published - 1 Jan 1997

Keywords

Fluorescence lifetimes
Fluorescence quantum yields
Photophysical characterization
Trans-4,4′-disubstituted stilbenes

ASJC Scopus subject areas

General Chemistry
General Chemical Engineering
General Physics and Astronomy

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10.1016/S1010-6030(97)00234-7

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title = "Photophysical characterization of trans-4,4′-disubstituted stilbenes",

abstract = "Absorption and emission spectra of twenty trans-4,4′-disubstituted stilbenes have been measured in four solvents: cyclohexane (CH), chlorobenzene (CB), 2-butanone (methylethyl ketone, MEK) and dimethylsulfoxide (DMSO) at room temperature. Fluorescence quantum yields (Φf) and fluorescence lifetimes (τf) have been measured for these stilbenes. The lifetimes and quantum yields of fluorescence were found to be dependent on the donor-acceptor properties of the substituents and correlate with the Hammett σ-constants. In addition, we experimentally observed the appearance of a second emitting state which is close energetically to the lowest exited singlet state 1t* in cases of strong donor-acceptor substituents in polar solvents.",

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author = "Vladislav Papper and Dina Pines and Gertz Likhtenshtein and Ehud Pines",

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T1 - Photophysical characterization of trans-4,4′-disubstituted stilbenes

AU - Papper, Vladislav

AU - Pines, Dina

AU - Likhtenshtein, Gertz

AU - Pines, Ehud

PY - 1997/1/1

Y1 - 1997/1/1

N2 - Absorption and emission spectra of twenty trans-4,4′-disubstituted stilbenes have been measured in four solvents: cyclohexane (CH), chlorobenzene (CB), 2-butanone (methylethyl ketone, MEK) and dimethylsulfoxide (DMSO) at room temperature. Fluorescence quantum yields (Φf) and fluorescence lifetimes (τf) have been measured for these stilbenes. The lifetimes and quantum yields of fluorescence were found to be dependent on the donor-acceptor properties of the substituents and correlate with the Hammett σ-constants. In addition, we experimentally observed the appearance of a second emitting state which is close energetically to the lowest exited singlet state 1t* in cases of strong donor-acceptor substituents in polar solvents.

AB - Absorption and emission spectra of twenty trans-4,4′-disubstituted stilbenes have been measured in four solvents: cyclohexane (CH), chlorobenzene (CB), 2-butanone (methylethyl ketone, MEK) and dimethylsulfoxide (DMSO) at room temperature. Fluorescence quantum yields (Φf) and fluorescence lifetimes (τf) have been measured for these stilbenes. The lifetimes and quantum yields of fluorescence were found to be dependent on the donor-acceptor properties of the substituents and correlate with the Hammett σ-constants. In addition, we experimentally observed the appearance of a second emitting state which is close energetically to the lowest exited singlet state 1t* in cases of strong donor-acceptor substituents in polar solvents.

KW - Fluorescence lifetimes

KW - Fluorescence quantum yields

KW - Photophysical characterization

KW - Trans-4,4′-disubstituted stilbenes

UR - https://www.scopus.com/pages/publications/0031537220

U2 - 10.1016/S1010-6030(97)00234-7

DO - 10.1016/S1010-6030(97)00234-7

M3 - Article

AN - SCOPUS:0031537220

SN - 1010-6030

VL - 111

SP - 87

EP - 96

JO - Journal of Photochemistry and Photobiology A: Chemistry

JF - Journal of Photochemistry and Photobiology A: Chemistry

IS - 1-3

ER -

Photophysical characterization of trans-4,4′-disubstituted stilbenes

Abstract

Keywords

ASJC Scopus subject areas

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