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
  • 4826 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 13 (literal)
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)
Prodotto di
Autore CNR

Incoming links:


Autore CNR di
Prodotto
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#rivistaDi
data.CNR.it