Reactions of radicals with hydrolyzed Bi(III) ions : a pulse radiolysis study
Langue
en
Article de revue
Ce document a été publié dans
Journal of Physical Chemistry A. 2007, vol. 111, n° 42, p. 10640-10645
American Chemical Society
Résumé en anglais
Radiolytic reduction of BiOClO4 in aqueous solutions leads to the formation of bismuth clusters and larger nanoparticles. The mechanisms of redox reactions of the polycationic Bi(III) species that exist in the solution ...Lire la suite >
Radiolytic reduction of BiOClO4 in aqueous solutions leads to the formation of bismuth clusters and larger nanoparticles. The mechanisms of redox reactions of the polycationic Bi(III) species that exist in the solution were investigated with pulse radiolysis. The kinetic and spectral properties of the transients formed by the reaction of these species with the primary radicals from water radiolysis are reported. The single-electron reduction product, Bi9(OH)224+, absorbs at lambdamax = 273 nm, while the OH adduct, Bi9(OH)235+, has a broad absorption spectrum with a maximum at 280 nm and a shoulder at 420 nm. Several rate constants were measured: k (e-aq + Bi9(OH)225+) = 1.2 x 1010 M-1 s-1 and k (OH + Bi9(OH)225+) = 1.5 x 109 M-1 s-1...< Réduire
Mots clés en anglais
Bismuth
Radiolysis
Transient intermediate
Nanoparticles
Origine
Importé de halUnités de recherche