Please use this identifier to cite or link to this item: https://hdl.handle.net/10316/90794
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dc.contributor.authorSchaberle, Fábio António-
dc.contributor.authorSoares, Carlos Alberto Lourenço de Serpa-
dc.contributor.authorMoreira, Luís Guilherme da Silva Arnaut-
dc.contributor.authorWard, Andrew D.-
dc.contributor.authorKarlsson, Joshua K. G.-
dc.contributor.authorAtahan, Alparslan-
dc.contributor.authorHarriman, Anthony-
dc.date.accessioned2020-09-07T14:47:16Z-
dc.date.available2020-09-07T14:47:16Z-
dc.date.issued2020-
dc.identifier.issn2624-8549pt
dc.identifier.urihttps://hdl.handle.net/10316/90794-
dc.description.abstractThe process of singlet-exciton fission (SEF) has attracted much attention of late. One of the most popular SEF compounds is TIPS-pentacene (TIPS-P, where TIPS = triisopropylsilylethynyl) but, despite its extensive use as both a reference and building block, its photophysical properties are not so well established. In particular, the triplet state excitation energy remains uncertain. Here, we report quantitative data and spectral characterization for excited-singlet and -triplet states in dilute solution. The triplet energy is determined to be 7940 1200 cm1 on the basis of sensitization studies using time-resolved photoacoustic calorimetry. The triplet quantum yield at the limit of low concentration and low laser intensity is only ca. 1%. Self-quenching occurs at a high solute concentration where the fluorescence yield and lifetime decrease markedly relative to dilute solution but we were unable to detect excimer emission by steady-state spectroscopy. Short-lived fluorescence, free from excimer emission or phosphorescence, occurs for crystals of TIPS-P, most likely from amorphous domains.pt
dc.description.sponsorshipRoteiro/0152/2013/022124; Laser Lab-Europe 654148pt
dc.language.isoengpt
dc.publisherMDPI Journalspt
dc.relationUID/QUI/00313/2020pt
dc.rightsopenAccesspt
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt
dc.subjectSinglet exciton fissionpt
dc.subjectTriplet statept
dc.subjectMolecular photophysicspt
dc.subjectPolyacenept
dc.subjectPhotoacoustic calorimetrypt
dc.subjectExcimerpt
dc.titleThe photophysical properties of triisopropylsilyl-ethynylpentacene: a molecule with an unusually large singlet-triplet energy gap in solution and solid phasespt
dc.typearticle-
degois.publication.firstPage545pt
degois.publication.lastPage564pt
degois.publication.issue2pt
degois.publication.titlechemistrypt
dc.relation.publisherversionhttps://www.mdpi.com/2624-8549/2/2/33pt
dc.peerreviewedyespt
dc.identifier.doi10.3390/chemistry2020033pt
degois.publication.volume2pt
dc.date.embargo2020-01-01*
uc.date.periodoEmbargo0pt
item.openairetypearticle-
item.languageiso639-1en-
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
item.cerifentitytypePublications-
item.grantfulltextopen-
item.fulltextCom Texto completo-
crisitem.author.researchunitCQC - Coimbra Chemistry Centre-
crisitem.author.researchunitCQC - Coimbra Chemistry Centre-
crisitem.author.researchunitCQC - Coimbra Chemistry Centre-
crisitem.author.parentresearchunitFaculty of Sciences and Technology-
crisitem.author.parentresearchunitFaculty of Sciences and Technology-
crisitem.author.parentresearchunitFaculty of Sciences and Technology-
crisitem.author.orcid0000-0002-9339-7259-
crisitem.author.orcid0000-0001-7004-0110-
crisitem.author.orcid0000-0002-3223-4819-
Appears in Collections:I&D CQC - Artigos em Revistas Internacionais
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