SOLVENT EFFECTS IN THE ELECTRON TRANSFER QUENCHING OF THE TRIPLET STATE OF ANTHRACENE BY p-BENZOQUINONES

dc.creatorZanini,Graciela P.
dc.creatorMontejano,Hernan A.
dc.date2001-03-01
dc.date.accessioned2017-03-07T15:09:16Z
dc.date.available2017-03-07T15:09:16Z
dc.identifierhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0366-16442001000100013
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/378990
dc.descriptionHere we present an investigation of the quenching of anthracene triplet by several p-benzoquinones, in two solvents of nearly equal macroscopic dielectric properties, methanol and acetonitrile. Bimolecular quenching rate constants were measured by laser flash photolysis. Quantum efficiencies of charge separation were also determined in the protic solvent. Quenching rate constants in acetonitrile follow a typical Rehm-Weller correlation for an electron transfer process. Although free radical ions are observed in methanol, the rate constants are nearly independent on the driving force, at variance of the expected behavior. In this solvent, the charge separation quantum yield decreases when the energy of the ion-pair decreases, in agreement with the energy gap law
dc.formattext/html
dc.languageen
dc.publisherSociedad Chilena de Química
dc.sourceBoletín de la Sociedad Chilena de Química v.46 n.1 2001
dc.subjectelectron transfer
dc.subjectsolvent effects
dc.subjectanthracene
dc.subjectquinones
dc.subjectquenching
dc.titleSOLVENT EFFECTS IN THE ELECTRON TRANSFER QUENCHING OF THE TRIPLET STATE OF ANTHRACENE BY p-BENZOQUINONES
dc.typeArtículos de revistas


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