Fluorescence of zeaxanthin and violaxanthin in aggregated forms

Wieslaw I. Gruszecki, Bogumil Zelent, Roger Leblanc

Research output: Contribution to journalArticle

22 Citations (Scopus)

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 languageEnglish
Pages (from-to)563-568
Number of pages6
JournalChemical Physics Letters
Volume171
Issue number5-6
DOIs
StatePublished - Aug 17 1990
Externally publishedYes

Fingerprint

Fluorescence
Carotenoids
fluorescence
carotenoids
Electronic states
carotene
Quantum yield
radiative lifetime
electronics
deactivation
ethyl alcohol
Ethanol
violaxanthin
Zeaxanthins
life (durability)
Water
water
excitation
energy

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 journalArticle

Gruszecki, Wieslaw I. ; Zelent, Bogumil ; Leblanc, Roger. / Fluorescence of zeaxanthin and violaxanthin in aggregated forms. In: Chemical Physics Letters. 1990 ; Vol. 171, No. 5-6. pp. 563-568.
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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.

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