Mostrar el registro sencillo del ítem
dc.contributor.author
Valle, Lorena
dc.contributor.author
Moran Vieyra, Faustino Eduardo
dc.contributor.author
Borsarelli, Claudio Darío
dc.date.available
2023-04-28T11:09:05Z
dc.date.issued
2012-06
dc.identifier.citation
Valle, Lorena; Moran Vieyra, Faustino Eduardo; Borsarelli, Claudio Darío; Hydrogen-bonding modulation of excited-state properties of flavins in a model of aqueous confined environment; Royal Society of Chemistry; Photochemical and Photobiological Sciences; 11; 6; 6-2012; 1051-1061
dc.identifier.issn
1474-905X
dc.identifier.uri
http://hdl.handle.net/11336/195754
dc.description.abstract
The singlet and triplet excited states properties of lumiflavin (LF), riboflavin (RF), flavin mononucleotide (FMN) and flavin adenine dinucleotide (FAD) in reversed micelles (RM) of sodium docusate (AOT) in n-hexane solutions were evaluated as a function of the water to surfactant molar ratio, w0 = [H2O]/[AOT], by both steady-state and time-resolved absorption and fluorescence spectroscopy. The results indicated that hydrogen-bonding interactions between the isoalloxazine ring of the flavins with the water molecules of the micellar interior play a crucial role on the modulation of the excited state properties of the flavins. Fluorescence dynamic experiments in the RM, allowed the calculation of similar values for both the internal rotational time of the flavins (θi) and the hydrogen-bonding relaxation time (τHB), e.g. ≈ 7 and 1.5 ns at w0 = 1 and 20, respectively. In turn, the triplet state lifetimes of the flavins were also enlarged in RM solutions at low w0, without modifications of their quantum yields. A hydrogen bonding relaxation model is proposed to explain the singlet excited state properties of the flavins, while the changes of the triplet state decays of the flavins were related with the global composition and strength of the hydrogen bonding network inside of the RM.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Royal Society of Chemistry
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
HIDROGEN-BONDING
dc.subject
FLAVINS
dc.subject
REVERSE MICELLES
dc.subject.classification
Otras Ciencias Químicas
dc.subject.classification
Ciencias Químicas
dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
dc.title
Hydrogen-bonding modulation of excited-state properties of flavins in a model of aqueous confined environment
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2023-04-27T13:01:21Z
dc.journal.volume
11
dc.journal.number
6
dc.journal.pagination
1051-1061
dc.journal.pais
Reino Unido
dc.journal.ciudad
Cambridge
dc.description.fil
Fil: Valle, Lorena. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Instituto de Química del Noroeste. Universidad Nacional de Tucumán. Facultad de Bioquímica, Química y Farmacia. Instituto de Química del Noroeste; Argentina
dc.description.fil
Fil: Moran Vieyra, Faustino Eduardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Instituto de Química del Noroeste. Universidad Nacional de Tucumán. Facultad de Bioquímica, Química y Farmacia. Instituto de Química del Noroeste; Argentina
dc.description.fil
Fil: Borsarelli, Claudio Darío. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Instituto de Química del Noroeste. Universidad Nacional de Tucumán. Facultad de Bioquímica, Química y Farmacia. Instituto de Química del Noroeste; Argentina
dc.journal.title
Photochemical and Photobiological Sciences
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://pubs.rsc.org/en/content/articlelanding/2012/pp/c2pp05385c
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1039/C2PP05385C
Archivos asociados