The role of the triplet state on the photobleaching processes of xanthene dyes in a poly(vinyl alcohol) matrix

dc.creatorTalhavini, M
dc.creatorCorradini, W
dc.creatorAtvars, TDZ
dc.date2001
dc.date42430
dc.date2014-11-16T06:35:33Z
dc.date2015-11-26T17:23:42Z
dc.date2014-11-16T06:35:33Z
dc.date2015-11-26T17:23:42Z
dc.date.accessioned2018-03-29T00:11:01Z
dc.date.available2018-03-29T00:11:01Z
dc.identifierJournal Of Photochemistry And Photobiology A-chemistry. Elsevier Science Sa, v. 139, n. 41700, n. 187, n. 197, 2001.
dc.identifier1010-6030
dc.identifierWOS:000167512200014
dc.identifier10.1016/S1010-6030(00)00426-3
dc.identifierhttp://www.repositorio.unicamp.br/jspui/handle/REPOSIP/72412
dc.identifierhttp://www.repositorio.unicamp.br/handle/REPOSIP/72412
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/72412
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1283893
dc.descriptionThis work presents the results for the temperature dependence of the photobleaching reactions of Fluorescein and Rose Bengal dissolved in poly(vinyl alcohol) in the presence of diethylenetriamine, potassium dichromate and 2-aminoethanethiol hydrochloride. These samples were subjected to a continuous irradiation with a 150 W mercury high pressure are lamp at a wavelength coincident with the maximum of the dye absorption. The photobleaching processes were described by a double exponential and a mono-exponential function for Fluorescein and Rose Bengal, respectively. Apparent activation energies were calculated using the Arrhenius plots and these Values were strongly affected by the presence of additives. Different additives are employed in the studies of the photobleaching reactions of Fluorescein and Rose Bengal in poly(vinyl alcohol) matrices: (a) diethylenetriamine is a quencher of all excited states; (b) potassium dichromate is an electron acceptor complexed with the polymer chains and inhibited the photobleaching; (c) 2-aminoethanethiol hydrochloride is an efficient quencher of the triplet state. The role of these additives upon the photoreaction is discussed. (C) 2001 Elsevier Science B.V. All rights reserved.
dc.description139
dc.description41700
dc.description187
dc.description197
dc.languageen
dc.publisherElsevier Science Sa
dc.publisherLausanne
dc.publisherSuíça
dc.relationJournal Of Photochemistry And Photobiology A-chemistry
dc.relationJ. Photochem. Photobiol. A-Chem.
dc.rightsfechado
dc.rightshttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dc.sourceWeb of Science
dc.subjectxanthene dyes
dc.subjectpoly(vinyl alcohol)
dc.subjectphotobleaching
dc.subjectdiethylenetriamine
dc.subjectpotassium dichromate
dc.subject2-aminoethanethiol hydrochloride
dc.subjectOptical Fluorescence Microscopy
dc.subjectHolographic Recording Material
dc.subjectKinetics
dc.subjectBlends
dc.subjectAcetate)
dc.titleThe role of the triplet state on the photobleaching processes of xanthene dyes in a poly(vinyl alcohol) matrix
dc.typeArtículos de revistas


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