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Free radical mediated oxidative degradation of carotenes and xanthophylls

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Walton_2020_Molecules_Free_VoR_CCBY.pdf (2.361Mb)
Date
26/02/2020
Author
Mordi, Raphael C.
Ademosun, Olabisi T.
Ajanaku, Christiana O.
Olanrewaju, Ifedolapo O.
Walton, John C.
Keywords
Free radicals
Carotenoids
Xanthophylls
Oxidation
β-carotene
Canthaxanthin
β-ionone
Retinal
Apo-carotenoids
QD Chemistry
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Abstract
This article reviews the excited-state quenching, pro-vitamin A activity and anticarcinogenicity of carotenes and xanthophylls in relation to their chemical structures. Excited-state quenching improved with the length of the conjugated chain structure. Pro-vitamin A activity was dependent on the presence of at least one beta-ionyl ring structure. The effectiveness of carotenoids as antioxidants depended on their ability to trap peroxyl radicals with production of resonance-stabilized carotenyl radicals. The products identified from oxidations of carotenes and xanthophylls with molecular oxygen and other oxidizing agents are presented. The free radical-mediated mechanisms that have been proposed to account for the different classes of products are reviewed.
Citation
Mordi , R C , Ademosun , O T , Ajanaku , C O , Olanrewaju , I O & Walton , J C 2020 , ' Free radical mediated oxidative degradation of carotenes and xanthophylls ' , Molecules , vol. 25 , no. 5 , 1038 . https://doi.org/10.3390/molecules25051038
Publication
Molecules
Status
Peer reviewed
DOI
https://doi.org/10.3390/molecules25051038
ISSN
1420-3049
Type
Journal item
Rights
Copyright © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
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  • University of St Andrews Research
URI
http://hdl.handle.net/10023/19603

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