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BF2-azadipyrromethenes: probing the excited-state dynamics of a NIR fluorophore and photodynamic therapy agent

hal.structure.identifierInstitut des Sciences Moléculaires [ISM]
hal.structure.identifierLaboratoire Ondes et Matière d'Aquitaine [LOMA]
dc.contributor.authorBATAT, Pinar
hal.structure.identifierInstitut des Sciences Moléculaires [ISM]
dc.contributor.authorCANTUEL, Martine
hal.structure.identifierLaboratoire Ondes et Matière d'Aquitaine [LOMA]
dc.contributor.authorJONUSAUSKAS, Gediminas
hal.structure.identifierInstitut des Sciences Moléculaires [ISM]
dc.contributor.authorSCARPANTONIO, Luca
hal.structure.identifierSchool of Chemistry and Chemical Biology [UCD]
dc.contributor.authorPALMA, Aniello
hal.structure.identifierSchool of Chemistry and Chemical Biology [UCD]
dc.contributor.authorO'SHEA, Donal F.
hal.structure.identifierInstitut des Sciences Moléculaires [ISM]
dc.contributor.authorMCCLENAGHAN, Nathan
dc.date.created2011-08-13
dc.date.issued2011-10-21
dc.identifier.issn1089-5639
dc.description.abstractEnBF2-Azadipyrromethene dyes are a promising class of NIR emitter (nonhalogenated) and photosensitizer (halogenated). Spectroscopic studies on a benchmark example of each type, including absorption (one and two photon), time-resolved transient absorption (ps-ms) and fluorescence, are reported. Fast photodynamics reveal that intense nanosecond NIR fluorescence is quenched in a brominated analog, giving rise to a persistent (21 μs) transient absorption signature. Kinetics for these changes are determined and ascribed to the efficient population of a triplet state (72%), which can efficiently sensitize singlet oxygen formation (ca. 74%), directly observed by 1Δg luminescence. Photostability measurements reveal extremely high stability, notably for the nonhalogenated variant, which is at least 103-times more stable (Φphotodeg. = < 10-8) than some representative BODIPY and fluorescein dyes.
dc.language.isoen
dc.publisherAmerican Chemical Society
dc.title.enBF2-azadipyrromethenes: probing the excited-state dynamics of a NIR fluorophore and photodynamic therapy agent
dc.typeArticle de revue
dc.identifier.doi10.1021/jp2077775
dc.subject.halPhysique [physics]/Physique [physics]/Chimie-Physique [physics.chem-ph]
bordeaux.journalJournal of Physical Chemistry A
bordeaux.page14034-14039
bordeaux.volume115
bordeaux.issue48
bordeaux.peerReviewedoui
hal.identifierhal-00667670
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-00667670v1
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