Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/20644
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Title

Facile method for spectroscopic examination of radical ions of hydrophilic carotenoids

AuthorsNaqvi, K. Razi; Melo, Thor Bernt; Jávorfi, Tamás; González Pérez, Sergio CSIC; Arellano, Juan B. CSIC ORCID
KeywordsHydrophilic carotenoids
Radical ions
Trolox methyl ether
Trolox
Crocetin
Issue DateJul-2009
PublisherRoyal Society of Chemistry (UK)
CitationPhys. Chem. Chem. Phys. (2009) 11:6401-6405
AbstractHydrophilic carotenoids, unusual members of an intrinsically hydrophobic family, and their radical ions are important reactants. An all-optical method for generating singly charged radical ions of a hydrophilic carotenoid (Car) is described. It relies on photolyzing an aqueous mixture of Car and a photoionizable auxiliary solute (A), and making conditions conducive to the capture, by Car, of the hydrated electron (e−aq) or the positive hole in A·+ or both. When A is Trolox (TOH), only e−aq can be captured, since TOH·+ deprotonates too rapidly to be a hole donor; when A is Trolox methyl ether (TOMe), both Car·− and Car·+ are formed, since TOMe·+ lives long enough to transfer its positive hole to Car; formation of Car·− is prevented under aerobic conditions.
Publisher version (URL)http://www.rsc.org/ej/CP/2009/b905454e.pdf
URI10261/20644
DOI10.1039/b905454e
Appears in Collections:(IRNASA) Artículos

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