Fluorescence of zeaxanthin and violaxanthin in aggregated forms

Wieslaw I. Gruszecki; Bogumil Zelent; Roger M. Leblanc

doi:10.1016/0009-2614(90)85264-D

Fluorescence of zeaxanthin and violaxanthin in aggregated forms

Wieslaw I. Gruszecki, Bogumil Zelent, Roger M. Leblanc

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23 Scopus citations

Abstract

The fluorescence emission, the absorption, and the fluorescence excitation spectra of zeaxanthin (Z) and violaxanthin (V) aggregates formed in a water-ethanol solvent system have been measured. Fluorescence quantum yield for zeaxanthin and violaxanthin are: φ{symbol}_F(Z) = 4.3 × 10^-4 and φ{symbol}_F(V) = 1.7 × 10^-3. The fluorescence lifetimes are τ_F(Z) = 1.06 ± 0.07 ns and τ_F(V) = 0.90 ± 0.10 ns. The calculated natural radiative lifetimes, τ⁰(Z) = 2.6 × 10^-6 s and τ⁰(V) = 5.3 × 10^-7 s correspond well to the literature values estimated for ¹A^*_g state of β-carotene by indirect measurements. The energy of the ¹A^*_g state of the carotenoid aggregates has been measured as 17860 cm^-1. The fluorescence of these carotenoid aggregates is related to the radiative deactivation of both the ¹B_u electronic singlet state and the symmetrically forbidden lowest excited electronic singlet state ¹A^*_g.

Original language	English (US)
Pages (from-to)	563-568
Number of pages	6
Journal	Chemical Physics Letters
Volume	171
Issue number	5-6
DOIs	https://doi.org/10.1016/0009-2614(90)85264-D
State	Published - Aug 17 1990
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy(all)
Physical and Theoretical Chemistry

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@article{81fc9ddbfd824202ba19329488904126,

title = "Fluorescence of zeaxanthin and violaxanthin in aggregated forms",

abstract = "The fluorescence emission, the absorption, and the fluorescence excitation spectra of zeaxanthin (Z) and violaxanthin (V) aggregates formed in a water-ethanol solvent system have been measured. Fluorescence quantum yield for zeaxanthin and violaxanthin are: φ{symbol}F(Z) = 4.3 × 10-4 and φ{symbol}F(V) = 1.7 × 10-3. The fluorescence lifetimes are τF(Z) = 1.06 ± 0.07 ns and τF(V) = 0.90 ± 0.10 ns. The calculated natural radiative lifetimes, τ0(Z) = 2.6 × 10-6 s and τ0(V) = 5.3 × 10-7 s correspond well to the literature values estimated for 1A*g state of β-carotene by indirect measurements. The energy of the 1A*g state of the carotenoid aggregates has been measured as 17860 cm-1. The fluorescence of these carotenoid aggregates is related to the radiative deactivation of both the 1Bu electronic singlet state and the symmetrically forbidden lowest excited electronic singlet state 1A*g.",

author = "Gruszecki, {Wieslaw I.} and Bogumil Zelent and Leblanc, {Roger M.}",

year = "1990",

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doi = "10.1016/0009-2614(90)85264-D",

language = "English (US)",

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pages = "563--568",

journal = "Chemical Physics Letters",

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T1 - Fluorescence of zeaxanthin and violaxanthin in aggregated forms

AU - Gruszecki, Wieslaw I.

AU - Zelent, Bogumil

AU - Leblanc, Roger M.

PY - 1990/8/17

Y1 - 1990/8/17

N2 - The fluorescence emission, the absorption, and the fluorescence excitation spectra of zeaxanthin (Z) and violaxanthin (V) aggregates formed in a water-ethanol solvent system have been measured. Fluorescence quantum yield for zeaxanthin and violaxanthin are: φ{symbol}F(Z) = 4.3 × 10-4 and φ{symbol}F(V) = 1.7 × 10-3. The fluorescence lifetimes are τF(Z) = 1.06 ± 0.07 ns and τF(V) = 0.90 ± 0.10 ns. The calculated natural radiative lifetimes, τ0(Z) = 2.6 × 10-6 s and τ0(V) = 5.3 × 10-7 s correspond well to the literature values estimated for 1A*g state of β-carotene by indirect measurements. The energy of the 1A*g state of the carotenoid aggregates has been measured as 17860 cm-1. The fluorescence of these carotenoid aggregates is related to the radiative deactivation of both the 1Bu electronic singlet state and the symmetrically forbidden lowest excited electronic singlet state 1A*g.

AB - The fluorescence emission, the absorption, and the fluorescence excitation spectra of zeaxanthin (Z) and violaxanthin (V) aggregates formed in a water-ethanol solvent system have been measured. Fluorescence quantum yield for zeaxanthin and violaxanthin are: φ{symbol}F(Z) = 4.3 × 10-4 and φ{symbol}F(V) = 1.7 × 10-3. The fluorescence lifetimes are τF(Z) = 1.06 ± 0.07 ns and τF(V) = 0.90 ± 0.10 ns. The calculated natural radiative lifetimes, τ0(Z) = 2.6 × 10-6 s and τ0(V) = 5.3 × 10-7 s correspond well to the literature values estimated for 1A*g state of β-carotene by indirect measurements. The energy of the 1A*g state of the carotenoid aggregates has been measured as 17860 cm-1. The fluorescence of these carotenoid aggregates is related to the radiative deactivation of both the 1Bu electronic singlet state and the symmetrically forbidden lowest excited electronic singlet state 1A*g.

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