Pulse Radiolysis of TIPS-Pentacene and a Fluorene-bridged Bis(pentacene): Evidence for Intramolecular Singlet-Exciton Fission

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dc.contributor.authorKarlsson, Joshua K. G.
dc.contributor.authorAtahan, Alparslan
dc.contributor.authorHarriman, Anthony
dc.contributor.authorTojo, Sachiko
dc.contributor.authorFujitsuka, Mamoru
dc.contributor.authorMajima, Tetsuro
dc.date.accessioned2020-04-30T23:31:32Z
dc.date.available2020-04-30T23:31:32Z
dc.date.issued2018
dc.departmentDÜ, Teknoloji Fakültesi, Polimer Mühendisliği Bölümüen_US
dc.descriptionKarlsson, Joshua/0000-0001-7281-1257; Harriman, Anthony/0000-0003-0679-2232en_US
dc.descriptionWOS: 000448083300023en_US
dc.descriptionPubMed: 29957960en_US
dc.description.abstractExposing TIPS-pentacene in deaerated benzene to ionizing radiation generates a mixture of singlet- and triplet-excited states of the solute. The singlet undergoes radiative decay without spin conversion whereas the triplet undergoes radiationless decay on the microsecond time scale. The concentration of each species was established by dosimetry. The excited-singlet state is not observed on the nanosecond-time scale for a related fluorene-bridged bis(pentacene), but the triplet is present in high concentration. Failure to detect the excited-singlet state is attributed to fast intramolecular singlet-exciton fission (iSEF) which is found to produce two triplet species. A short-lived intermediate (tau(T) = 145 ns) is identified as the species (T_T) having both pentacene units present as triplet states. The second transient is longer lived (tau(T) = 7.5 mu s) and is assigned to the corresponding species (T_G) with a single pentacene promoted to the triplet level. Dosimetry is used to conclude that iSEF partitions overwhelmingly in favor of T_G (70%) relative to T_T (25%). The total triplet yield from iSEF, therefore, is ca. 120% in this system, where the pentacene terminals are weakly coupled.en_US
dc.description.sponsorshipNewcastle University; TUBITAK (The Scientific and Technological Research Council of Turkey)Turkiye Bilimsel ve Teknolojik Arastirma Kurumu (TUBITAK); Ministry of Education, Culture, Sports, Science and Technology of the Japanese GovernmentMinistry of Education, Culture, Sports, Science and Technology, Japan (MEXT) [25220806]; RSCen_US
dc.description.sponsorshipWe thank Newcastle University for financial support. A.A. thanks TUBITAK (The Scientific and Technological Research Council of Turkey) for the award of a research fellowship and J.G.K.K. acknowledges the award of a travel scholarship from the RSC. T.M. thanks the Ministry of Education, Culture, Sports, Science and Technology of the Japanese Government for partly support by Grant-in-Aid for Scientific Research (Projects 25220806 and others).en_US
dc.identifier.doi10.1021/acs.jpclett.8b02006en_US
dc.identifier.endpage3938en_US
dc.identifier.issn1948-7185
dc.identifier.issue14en_US
dc.identifier.scopusqualityQ1en_US
dc.identifier.startpage3934en_US
dc.identifier.urihttps://doi.org/10.1021/acs.jpclett.8b02006
dc.identifier.urihttps://hdl.handle.net/20.500.12684/4282
dc.identifier.volume9en_US
dc.identifier.wosWOS:000448083300023en_US
dc.identifier.wosqualityQ1en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakPubMeden_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherAmer Chemical Socen_US
dc.relation.ispartofJournal Of Physical Chemistry Lettersen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.titlePulse Radiolysis of TIPS-Pentacene and a Fluorene-bridged Bis(pentacene): Evidence for Intramolecular Singlet-Exciton Fissionen_US
dc.typeArticleen_US

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