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Título

Macromolecular polyradicals with cyclic triphosphazene as a core. Spectral and electrochemical properties

AutorCarriedo, Gabino A.; García Alonso, Francisco J.; Gómez Elipe, P.; Brillas, Enric; Labarta, Amílcar; Juliá, Lluís
Palabras claveCyclotriphosphazenes
Electrochemical properties
Spectral properties
Electron-transfer reactions
Fecha de publicación9-ene-2004
EditorAmerican Chemical Society
CitaciónJournal of Organic Chemistry 69(1): 99-104 (2004)
ResumenStable cyclotriphosphazenes 5 and 6, with three and four carbon radical centers, have been prepared by condensation of (4-hydroxy-2,6-dichlorophenyl)bis(2,4,6-trichlorophenyl)methyl radical (4) with tetrachloro-2,2‘-dioxybiphenylcyclotriphosphazene (7). EPR studies of both polyradicals in fluid solution suggest an electronic communication through the PN multiple bonds of the cycle. EPR spectral results in frozen solutions and magnetic susceptibility measurements in the solid are consistent with very weak electron−electron dipolar interactions. Reductive cyclic voltammetry shows a single three-electron redox couple for triradical 5 and a single four-electron redox couple for tetraradical 6. Both polyradicals 5 and 6 have been chemically oxidized to a stable trication 53+ and a tetracation 64+, respectively, by electron-transfer reactions.
Descripción6 pages, 6 figures, 2 tables, 2 charts.-- PMID: 14703384 [PubMed].-- Available online Dec 9, 2003.
Versión del editorhttp://dx.doi.org/10.1021/jo035349u
URIhttp://hdl.handle.net/10261/18111
DOI10.1021/jo035349u
ISSN0022-3263 (Print)
1520-6904 (Online)
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