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dc.contributor.author
Lopez, Sergio Gabriel  
dc.contributor.author
Worringer, Gregor  
dc.contributor.author
Rodriguez, Hernan Bernardo  
dc.contributor.author
San Roman, Enrique Arnoldo  
dc.date.available
2019-04-11T13:31:18Z  
dc.date.issued
2010-03  
dc.identifier.citation
Lopez, Sergio Gabriel; Worringer, Gregor; Rodriguez, Hernan Bernardo; San Roman, Enrique Arnoldo; Trapping of Rhodamine 6G excitation energy on cellulose microparticles; Royal Society of Chemistry; Physical Chemistry Chemical Physics; 12; 9; 3-2010; 2246-2253  
dc.identifier.issn
1463-9076  
dc.identifier.uri
http://hdl.handle.net/11336/74012  
dc.description.abstract
Rhodamine 6G (R6G) was adsorbed on cellulose microparticles and fluorescence quantum yields and decays were measured as a function of dye loading. Though no spectroscopic evidence of dye aggregation was found, a noticeable decrease of quantum yield - after correction for reabsorption and reemission of fluorescence - and shortening of decays were observed at the highest loadings. These effects were attributed to the dissipation of the excitation energy by traps constituted by R6G pairs, leading to static and dynamic quenching produced by direct absorption of traps and non-radiative energy transfer from monomers, respectively. Regarding the nature of traps, two extreme approaches were considered: (a) equilibrium between monomers slightly interacting in the ground state and (b) randomly distributed monomers located below a critical distance (statistical traps). Both approaches accounted quantitatively for the observed facts. The effect of energy migration was evaluated through computational simulations. As the concentration of traps could only be indirectly inferred, in some experiments an external energy transfer quencher, Methylene Blue, was coadsorbed and the results were compared with those obtained with pure R6G.  
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
Rhodamine 6g  
dc.subject
Cellulose Microparticles  
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Energy Transfer  
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Statistical Traps  
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Otras Ciencias Químicas  
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Ciencias Químicas  
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CIENCIAS NATURALES Y EXACTAS  
dc.title
Trapping of Rhodamine 6G excitation energy on cellulose microparticles  
dc.type
info:eu-repo/semantics/article  
dc.type
info:ar-repo/semantics/artículo  
dc.type
info:eu-repo/semantics/publishedVersion  
dc.date.updated
2019-03-26T14:15:07Z  
dc.journal.volume
12  
dc.journal.number
9  
dc.journal.pagination
2246-2253  
dc.journal.pais
Reino Unido  
dc.description.fil
Fil: Lopez, Sergio Gabriel. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Química, Física de los Materiales, Medioambiente y Energía. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Química, Física de los Materiales, Medioambiente y Energía; Argentina  
dc.description.fil
Fil: Worringer, Gregor. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Química, Física de los Materiales, Medioambiente y Energía. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Química, Física de los Materiales, Medioambiente y Energía; Argentina  
dc.description.fil
Fil: Rodriguez, Hernan Bernardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Química, Física de los Materiales, Medioambiente y Energía. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Química, Física de los Materiales, Medioambiente y Energía; Argentina  
dc.description.fil
Fil: San Roman, Enrique Arnoldo. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Química, Física de los Materiales, Medioambiente y Energía. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Química, Física de los Materiales, Medioambiente y Energía; Argentina  
dc.journal.title
Physical Chemistry Chemical Physics  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1039/b919583a  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://pubs.rsc.org/en/Content/ArticleLanding/2010/CP/b919583a