http://www.cnr.it/ontology/cnr/individuo/prodotto/ID16247
Kinetics of the Oxidation of Quercetin by 2,2-Diphenyl-1-picrylhydrazyl (dpph) (Articolo in rivista)
- Type
- Label
- Kinetics of the Oxidation of Quercetin by 2,2-Diphenyl-1-picrylhydrazyl (dpph) (Articolo in rivista) (literal)
- Anno
- 2011-01-01T00:00:00+01:00 (literal)
- Alternative label
Mario C. Foti, Carmelo Daquino, Gino A. DiLabio, and K. U. Ingold (2011)
Kinetics of the Oxidation of Quercetin by 2,2-Diphenyl-1-picrylhydrazyl (dpph)
in Organic letters (Print)
(literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
- Mario C. Foti, Carmelo Daquino, Gino A. DiLabio, and K. U. Ingold (literal)
- Pagina inizio
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
- Rivista
- Note
- ISI Web of Science (WOS) (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
- Istituto di Chimica Biomolecolare del CNR, Via P. Gaifami 18, I-95126 Catania, Italy,
National Institute for Nanotechnology, National Research Council of Canada 11421
Saskatchewan Drive, Edmonton, AB, Canada T6G 2M9, and National Research Council
of Canada, 100 Sussex Drive, Ottawa, ON, Canada K1A0R6 (literal)
- Titolo
- Kinetics of the Oxidation of Quercetin by 2,2-Diphenyl-1-picrylhydrazyl (dpph) (literal)
- Abstract
- In methanol/water, dppho bleaching (519 nm) by quercetin, QH2, exhibits biphasic kinetics. The dppho reacts completely with the quercetin anion
within 100 ms. Subsequent slower bleaching involves solvent and QH2 addition to quinoid products. The fast reaction is first-order in dppho but
only ca. 0.38 order in [QH2]. This extraordinary nonintegral order is attributed to reversible formation of ?-stacked {QH-/dppho} complexes in
which electron transfer to products, {QHo/dpph-}, is slow (kET ? 10^5 s^-?1). (literal)
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- Autore CNR
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