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Título: | Facile method for spectroscopic examination of radical ions of hydrophilic carotenoids |
Autor: | Naqvi, K. Razi; Melo, Thor Bernt; Jávorfi, Tamás; González Pérez, Sergio CSIC; Arellano, Juan B. CSIC ORCID | Palabras clave: | Hydrophilic carotenoids Radical ions Trolox methyl ether Trolox Crocetin |
Fecha de publicación: | jul-2009 | Editor: | Royal Society of Chemistry (UK) | Citación: | Phys. Chem. Chem. Phys. (2009) 11:6401-6405 | Resumen: | Hydrophilic 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. | Versión del editor: | http://www.rsc.org/ej/CP/2009/b905454e.pdf | URI: | 10261/20644 | DOI: | 10.1039/b905454e |
Aparece en las colecciones: | (IRNASA) Artículos |
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b905454e.pdf | 552,96 kB | Adobe PDF | Visualizar/Abrir |
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