1 November 2006 Lycopene is more potent than beta carotene in the neutralization of singlet oxygen: role of energy transfer probed by ultrafast Raman spectroscopy
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J. of Biomedical Optics, 11(6), 064025 (2006). doi:10.1117/1.2398884
Abstract
Energy transfer processes between beta carotene, lycopene, and singlet oxygen (1O2) have been studied by ultrafast Raman spectroscopy. Our experimental results demonstrate that during the neutralization of singlet oxygen by beta carotene the excitation energy of singlet oxygen is transferred directly to the first excited electronic state S1 of beta carotene. In contrast, the excitation energy of singlet oxygen is transferred directly to the ground excited vibronic state S0 of lycopene. Our data not only provide the first direct experimental elucidation of energy transfer processes in such important biological systems but also help explain why lycopene is a more potent antioxidant than beta carotene in the neutralization of singlet oxygen.
Kong-Thon Tsen, Shaw-Wei D. Tsen, Juliann G. Kiang, "Lycopene is more potent than beta carotene in the neutralization of singlet oxygen: role of energy transfer probed by ultrafast Raman spectroscopy," Journal of Biomedical Optics 11(6), 064025 (1 November 2006). http://dx.doi.org/10.1117/1.2398884
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KEYWORDS
Oxygen

Molecules

Raman spectroscopy

Energy transfer

Ultrafast laser spectroscopy

Molecular energy transfer

Light scattering

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