The Photophysical Properties of Triisopropylsilyl-ethynylpentacene-A Molecule with an Unusually Large Singlet-Triplet Energy Gap-In Solution and Solid Phases

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dc.authoridKarlsson, Joshua/0000-0001-7281-1257
dc.authoridWard, Andrew/0000-0001-6946-2391
dc.authoridHarriman, Anthony/0000-0003-0679-2232
dc.authoridSchaberle, Fabio/0000-0002-9339-7259
dc.authoridArnaut, Luis/0000-0002-3223-4819
dc.authorwosidKarlsson, Joshua/U-8537-2017
dc.authorwosidWard, Andrew/G-3135-2015
dc.authorwosidArnaut, Luis/Q-4135-2016
dc.contributor.authorSchaberle, Fabio A.
dc.contributor.authorSerpa, Carlos
dc.contributor.authorArnaut, Luis G.
dc.contributor.authorWard, Andrew D.
dc.contributor.authorKarlsson, Joshua K. G.
dc.contributor.authorAtahan, Alparslan
dc.contributor.authorHarriman, Anthony
dc.date.accessioned2021-12-01T18:50:41Z
dc.date.available2021-12-01T18:50:41Z
dc.date.issued2020
dc.department[Belirlenecek]en_US
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 cm(-1) 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 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.en_US
dc.description.sponsorshipPortuguese Science FoundationPortuguese Foundation for Science and Technology [UIDB/QUI/00313/2020, Roteiro/0152/2013/022124]; European Union's Horizon 2020 Research and Innovation Programme [654148]; TUBITAK (The Scientific and Technological Research Council of Turkey)Turkiye Bilimsel ve Teknolojik Arastirma Kurumu (TUBITAK)en_US
dc.description.sponsorshipWe thank Newcastle University and Coimbra University for providing access to key facilities to undertake this research project. We also thank STFC CLF Octopus Facility for PoC access to the NIR emission microscope. Thanks are due to Luzitin S.A. for providing a sample of redaporfin. We acknowledge financial support from the Portuguese Science Foundation (UIDB/QUI/00313/2020, Roteiro/0152/2013/022124) and from the European Union's Horizon 2020 Research and Innovation Programme under grant agreement no. 654148 Laser Lab-Europe. AA thanks TUBITAK (The Scientific and Technological Research Council of Turkey) for the award of a research fellowship.en_US
dc.identifier.doi10.3390/chemistry2020033
dc.identifier.endpage564en_US
dc.identifier.issn2624-8549
dc.identifier.issue2en_US
dc.identifier.startpage545en_US
dc.identifier.urihttps://doi.org/10.3390/chemistry2020033
dc.identifier.urihttps://hdl.handle.net/20.500.12684/10912
dc.identifier.volume2en_US
dc.identifier.wosWOS:000655393100001en_US
dc.identifier.wosqualityN/Aen_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.language.isoenen_US
dc.publisherMdpien_US
dc.relation.ispartofChemistry-Switzerlanden_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subjectsinglet exciton fissionen_US
dc.subjecttriplet stateen_US
dc.subjectmolecular photophysicsen_US
dc.subjectpolyaceneen_US
dc.subjectphotoacoustic calorimetryen_US
dc.subjectexcimeren_US
dc.subjectExciton Fissionen_US
dc.subjectTips-Pentaceneen_US
dc.subjectFunctionalized Pentaceneen_US
dc.subjectThin-Filmsen_US
dc.subjectPhotoacoustic Calorimetryen_US
dc.subjectCharge-Transferen_US
dc.subjectFluorescenceen_US
dc.subjectStateen_US
dc.subjectAbsorptionen_US
dc.subjectDynamicsen_US
dc.titleThe Photophysical Properties of Triisopropylsilyl-ethynylpentacene-A Molecule with an Unusually Large Singlet-Triplet Energy Gap-In Solution and Solid Phasesen_US
dc.typeArticleen_US

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