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dc.contributor.author
Bertolotti, Sonia Graciela
dc.contributor.author
Montejano, Hernan Alfredo
dc.contributor.author
Previtali, Carlos Mario
dc.date.available
2019-07-16T13:14:52Z
dc.date.issued
2013-11
dc.identifier.citation
Bertolotti, Sonia Graciela; Montejano, Hernan Alfredo; Previtali, Carlos Mario; Comparison of the kinetics of electron transfer in the diffusion limit for the singlet and triplet quenching of eosin y by quinones; Wiley Blackwell Publishing, Inc; Photochemistry and Photobiology; 89; 6; 11-2013; 1442-1447
dc.identifier.issn
0031-8655
dc.identifier.uri
http://hdl.handle.net/11336/79613
dc.description.abstract
Electron transfer (ET) rate constants were determined by means of lifetime measurements for the fluorescence quenching and by laser flash photolysis for the triplet quenching of the dye eosin Y by benzoquinones in acetonitrile. The results represent a new aspect of the dependence of the rate constants with the driving force in the diffusion limit region. That is, the rate constants for singlet quenching in the highly negative region of ΔGet do not decrease as predicted by Marcus theory, but rather show a small positive dependence on the driving force. However, it is found that, in the same free energy range, the triplet rate constants are lower than those for the singlet process. They also increase with the exergonicity of the reaction, but the dependence with ΔGet is less marked than that found for the singlet reaction. Even at a Gibbs energy change of -1.0 eV the triplet quenching rate constants do not reach the theoretical diffusion limit. The results are analyzed using the current theories for diffusion-mediated ET reactions.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Wiley Blackwell Publishing, Inc
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Diffusion Limit
dc.subject
Dyes
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Electron Transfer
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Triplet State
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Otras Ciencias Químicas
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Ciencias Químicas
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CIENCIAS NATURALES Y EXACTAS
dc.title
Comparison of the kinetics of electron transfer in the diffusion limit for the singlet and triplet quenching of eosin y by quinones
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2019-07-15T20:44:19Z
dc.identifier.eissn
1751-1097
dc.journal.volume
89
dc.journal.number
6
dc.journal.pagination
1442-1447
dc.journal.pais
Reino Unido
dc.journal.ciudad
Londres
dc.description.fil
Fil: Bertolotti, Sonia Graciela. Universidad Nacional de Río Cuarto. Facultad de Ciencias Exactas Fisicoquímicas y Naturales. Departamento de Química; Argentina
dc.description.fil
Fil: Montejano, Hernan Alfredo. Universidad Nacional de Río Cuarto. Facultad de Ciencias Exactas Fisicoquímicas y Naturales. Departamento de Química; Argentina
dc.description.fil
Fil: Previtali, Carlos Mario. Universidad Nacional de Río Cuarto. Facultad de Ciencias Exactas Fisicoquímicas y Naturales. Departamento de Química; Argentina
dc.journal.title
Photochemistry and Photobiology
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://onlinelibrary.wiley.com/doi/full/10.1111/php.12089
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1111/php.12089
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