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.
| Original language | English |
|---|---|
| Pages (from-to) | 563-568 |
| Number of pages | 6 |
| Journal | Chemical Physics Letters |
| Volume | 171 |
| Issue number | 5-6 |
| DOIs | |
| State | Published - Aug 17 1990 |
| Externally published | Yes |
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ASJC Scopus subject areas
- Physical and Theoretical Chemistry
- Spectroscopy
- Condensed Matter Physics
- Atomic and Molecular Physics, and Optics
- Surfaces and Interfaces
Cite this
Fluorescence of zeaxanthin and violaxanthin in aggregated forms. / Gruszecki, Wieslaw I.; Zelent, Bogumil; Leblanc, Roger.
In: Chemical Physics Letters, Vol. 171, No. 5-6, 17.08.1990, p. 563-568.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Fluorescence of zeaxanthin and violaxanthin in aggregated forms
AU - Gruszecki, Wieslaw I.
AU - Zelent, Bogumil
AU - Leblanc, Roger
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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UR - http://www.scopus.com/inward/citedby.url?scp=0001569553&partnerID=8YFLogxK
U2 - 10.1016/0009-2614(90)85264-D
DO - 10.1016/0009-2614(90)85264-D
M3 - Article
VL - 171
SP - 563
EP - 568
JO - Chemical Physics Letters
JF - Chemical Physics Letters
SN - 0009-2614
IS - 5-6
ER -