English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/9338
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar a otros formatos:


Reducing Power of Simple Polyphenols by Electron-Transfer Reactions Using a New Stable Radical of the PTM Series, Tris (2,3,5,6-tetrachloro-4-nitrophenyl)methyl Radical.

AuthorsTorres, Josep Lluís ; Carreras, Anna ; Jiménez, Aurora; Brillas, Enric; Torrelles, Xavier ; Rius, Jordi ; Juliá, Lluís
Stable radicals
Issue Date17-Apr-2007
PublisherAmerican Chemical Society
CitationThe Journal of Organic Chemistry, 72(10): 3750-3756 (2007)
AbstractThe synthesis and characterization of a new radical and its use for testing the antioxidant activity of polyphenols by electron transfer are reported. This new and stable species of magnetic nature, tris-(2,3,5,6-tetrachloro-4-nitrophenyl)methyl (TNPTM) radical, has been characterized by electron paramagnetic resonance and its molecular structure determined by X-ray analysis. This new radical of the PTM (perchlorotriphenylmethyl) series, unlike 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical, is stable in conditions of hydrogen abstraction reactions. TNPTM radical is able to discriminate between the antioxidant activities of catechol and pyrogallol in hydroxylated solvent mixtures such as chloroform/methanol (2:1). These features determine the antioxidant/pro-oxidant character and the biological activities of natural and synthetic flavonoids.
Description7 pages, 3 figures.-- PMID: 17439176 [PubMed].
Supporting information (15 pages) available at: http://pubs.acs.org/doi/suppl/10.1021/jo062665a/suppl_file/jo062665asi20070314_072402.pdf
Supplementary Crystallographic Information File available at: http://pubs.acs.org/doi/suppl/10.1021/jo062665a/suppl_file/jo062665asi20070315_085423.cif
Publisher version (URL)http://dx.doi.org/10.1021/jo062665a
Appears in Collections:(IQAC) Artículos
Files in This Item:
There are no files associated with this item.
Show full item record
Review this work

Related articles:

WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.