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dc.contributor.author | De Miguel de la Torre, Maykel | es_ES |
dc.contributor.author | Alvaro Rodríguez, Maria Mercedes | es_ES |
dc.contributor.author | García Gómez, Hermenegildo | es_ES |
dc.date.accessioned | 2016-06-29T08:52:56Z | |
dc.date.issued | 2012-02-02 | |
dc.identifier.issn | 0743-7463 | |
dc.identifier.uri | http://hdl.handle.net/10251/66724 | |
dc.description.abstract | [EN] Graphene sheets quench the singlet and triplet excited states of a series of six photochemical probes including pyrene, acridine orange, tris(2,2-bipyridyl)ruthenium(II) dichloride, methylene blue, meso-tetrakis(phenylsulphonate)porphyrin, and 5,10,15,20-tetraphenyl-21H,28H-porphine zinc. It was found that Stern-Volmer fluorescence quenching can fit to one or two different quenching regimes depending on the probe. In addition, the quenching can be either static or dynamic depending on the fluorophore. The occurrence of several quenching regimes has been interpreted considering that quenching arises from the crowding of the fluorophore on both graphene faces, or site isolation on the graphene sheets. Laser flash photolysis has shown that the triplet lifetime of the probes generally decreases due to graphene quenching and that no new transients appear except in the case of methylene blue, where a new absorption spectrum characterized by a continuous absorption band is observed and attributed to graphene radical ion. This spectroscopic evidence suggests that the most general quenching mechanism is energy transfer from the singlet or triplet excited state of the dye to graphene. This raises the issue of determining the energy of the electronic excited states of graphene. | es_ES |
dc.description.sponsorship | Financial support by the Spanish DGI (CTQ2010-18671) is gratefully acknowledged. The authors thank NanoIntegris for the generous gift of the graphene solution used in this study. | |
dc.language | Inglés | es_ES |
dc.publisher | American Chemical Society | es_ES |
dc.relation.ispartof | Langmuir | es_ES |
dc.rights | Reserva de todos los derechos | es_ES |
dc.subject | Wall carbon nanotubes | es_ES |
dc.subject | Laser flash-photolysis | es_ES |
dc.subject | Exfoliated graphite oxide | es_ES |
dc.subject | Charge-transfer | es_ES |
dc.subject | Photphysical properties | es_ES |
dc.subject | Fullerene derivatives | es_ES |
dc.subject | Zinc porphyrin | es_ES |
dc.subject | Single | es_ES |
dc.subject | Fluorescence | es_ES |
dc.subject | Nanohybrids | es_ES |
dc.subject.classification | QUIMICA ORGANICA | es_ES |
dc.title | Graphene as a Quencher of Electronic Excited States of Photochemical Probes | es_ES |
dc.type | Artículo | es_ES |
dc.embargo.lift | 10000-01-01 | |
dc.embargo.terms | forever | es_ES |
dc.identifier.doi | 10.1021/la204023w | |
dc.relation.projectID | info:eu-repo/grantAgreement/MICINN//CTQ2010-18671/ES/APLICACION DE SOLIDOS RETICULARES METAL-ORGANICO MODIFICADOS COMO CATALIZADORES HETEROGENEOS EN PROCESOS DE OXIDACION AEROBICA Y EN REACCIONES PROMOVIDAS POR ACIDOS DE LEWIS/ | es_ES |
dc.rights.accessRights | Cerrado | es_ES |
dc.contributor.affiliation | Universitat Politècnica de València. Instituto Universitario Mixto de Tecnología Química - Institut Universitari Mixt de Tecnologia Química | es_ES |
dc.contributor.affiliation | Universitat Politècnica de València. Departamento de Química - Departament de Química | es_ES |
dc.description.bibliographicCitation | De Miguel De La Torre, M.; Alvaro Rodríguez, MM.; García Gómez, H. (2012). Graphene as a Quencher of Electronic Excited States of Photochemical Probes. Langmuir. 28(5):2849-2857. https://doi.org/10.1021/la204023w | es_ES |
dc.description.accrualMethod | S | es_ES |
dc.relation.publisherversion | http://dx.doi.org/10.1021/la204023w | es_ES |
dc.description.upvformatpinicio | 2849 | es_ES |
dc.description.upvformatpfin | 2857 | es_ES |
dc.type.version | info:eu-repo/semantics/publishedVersion | es_ES |
dc.description.volume | 28 | es_ES |
dc.description.issue | 5 | es_ES |
dc.relation.senia | 240374 | es_ES |
dc.identifier.pmid | 22220928 | |
dc.contributor.funder | Ministerio de Ciencia e Innovación |