Lycopene is more potent than beta carotene in the neutralization of singlet oxygen: Role of energy transfer probed by ultrafast Raman spectroscopy

Kong-Thon Tsen, Shaw Wei D Tsen, Juliann G. Kiang

Research output: Contribution to journalArticle

10 Citations (Scopus)

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.

Original languageEnglish (US)
Article number064025
JournalJournal of Biomedical Optics
Volume11
Issue number6
DOIs
StatePublished - Nov 2006

Fingerprint

carotene
Singlet Oxygen
Raman Spectrum Analysis
Energy Transfer
beta Carotene
Energy transfer
Raman spectroscopy
energy transfer
Oxygen
oxygen
Excitation energy
excitation
antioxidants
Electronic states
Biological systems
Antioxidants
Excited states
lycopene
Carotenoids
energy

Keywords

  • Beta carotene
  • Energy transfer
  • Lycopene
  • Raman spectroscopy
  • Singlet oxygen

ASJC Scopus subject areas

  • Biomedical Engineering
  • Biomaterials
  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Radiology Nuclear Medicine and imaging
  • Radiological and Ultrasound Technology
  • Clinical Biochemistry

Cite this

Lycopene is more potent than beta carotene in the neutralization of singlet oxygen : Role of energy transfer probed by ultrafast Raman spectroscopy. / Tsen, Kong-Thon; Tsen, Shaw Wei D; Kiang, Juliann G.

In: Journal of Biomedical Optics, Vol. 11, No. 6, 064025, 11.2006.

Research output: Contribution to journalArticle

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