Fast and Tunable Phosphorescence from Organic Ionic Crystals

dc.contributorAalto-yliopistofi
dc.contributorAalto Universityen
dc.contributor.authorPartanen, Iidaen_US
dc.contributor.authorAl-Saedy, Omaren_US
dc.contributor.authorEskelinen, Tonien_US
dc.contributor.authorKarttunen, Antti J.en_US
dc.contributor.authorSaarinen, Jarkko J.en_US
dc.contributor.authorMrózek, Ondrejen_US
dc.contributor.authorSteffen, Andreasen_US
dc.contributor.authorBelyaev, Andreyen_US
dc.contributor.authorChou, Pi-Taien_US
dc.contributor.authorKoshevoy, Igor O.en_US
dc.contributor.departmentDepartment of Chemistry and Materials Scienceen
dc.contributor.groupauthorInorganic Materials Modellingen
dc.contributor.organizationUniversity of Eastern Finlanden_US
dc.contributor.organizationTU Dortmund Universityen_US
dc.contributor.organizationNational Taiwan Universityen_US
dc.date.accessioned2023-10-25T07:35:10Z
dc.date.available2023-10-25T07:35:10Z
dc.date.issued2023-09-04en_US
dc.descriptionFunding Information: Financial support from the Academy of Finland (decision 351618, I.O.K.; decision 340584, T.E. and A.J.K.; decision 339544, J.J.S.; Flagship Programme, Photonics Research and Innovation PREIN, decision 320166), Alexander von Humboldt and Otto A. Malm Foundations (A.B.), and the National Science and Technology Council (NSTC), Taiwan, are gratefully acknowledged. Publisher Copyright: © 2023 The Authors. Angewandte Chemie International Edition published by Wiley-VCH GmbH.
dc.description.abstractCrystalline diphosphonium iodides [MeR2P-spacer-R2Me]I with phenylene (1, 2), naphthalene (3, 4), biphenyl (5) and anthracene (6) as aromatic spacers, are photoemissive under ambient conditions. The emission colors (λem values from 550 to 880 nm) and intensities (Φem reaching 0.75) are defined by the composition and substitution geometry of the central conjugated chromophore motif, and the anion-π interactions. Time-resolved and variable-temperature luminescence studies suggest phosphorescence for all the titled compounds, which demonstrate observed lifetimes of 0.46–92.23 μs at 297 K. Radiative rate constants kr as high as 2.8×105 s−1 deduced for salts 1–3 were assigned to strong spin-orbit coupling enhanced by an external heavy atom effect arising from the anion-π charge-transfer character of the triplet excited state. These rates of anomalously fast metal-free phosphorescence are comparable to those of transition metal complexes and organic luminophores that utilize triplet excitons via a thermally activated delayed fluorescence mechanism, making such ionic luminophores a new paradigm for the design of photofunctional and responsive molecular materials.en
dc.description.versionPeer revieweden
dc.format.extent9
dc.format.mimetypeapplication/pdfen_US
dc.identifier.citationPartanen, I, Al-Saedy, O, Eskelinen, T, Karttunen, A J, Saarinen, J J, Mrózek, O, Steffen, A, Belyaev, A, Chou, P-T & Koshevoy, I O 2023, ' Fast and Tunable Phosphorescence from Organic Ionic Crystals ', Angewandte Chemie - International Edition, vol. 62, no. 36, e202305108 . https://doi.org/10.1002/anie.202305108en
dc.identifier.doi10.1002/anie.202305108en_US
dc.identifier.issn1433-7851
dc.identifier.issn1521-3773
dc.identifier.otherPURE UUID: 62ec0c1f-3637-493e-8baa-334db9f9893cen_US
dc.identifier.otherPURE ITEMURL: https://research.aalto.fi/en/publications/62ec0c1f-3637-493e-8baa-334db9f9893cen_US
dc.identifier.otherPURE LINK: http://www.scopus.com/inward/record.url?scp=85162055107&partnerID=8YFLogxKen_US
dc.identifier.otherPURE FILEURL: https://research.aalto.fi/files/125292863/CHEM_Partanen_et_al_Fast_and_Tunable_2023_Angewandte_Chemie.pdfen_US
dc.identifier.urihttps://aaltodoc.aalto.fi/handle/123456789/124252
dc.identifier.urnURN:NBN:fi:aalto-202310256625
dc.language.isoenen
dc.publisherWiley-VCH Verlag
dc.relation.ispartofseriesAngewandte Chemie - International Editionen
dc.relation.ispartofseriesVolume 62, issue 36en
dc.rightsopenAccessen
dc.subject.keywordAnion-π Interactionsen_US
dc.subject.keywordCharge Transferen_US
dc.subject.keywordCrystal Engineeringen_US
dc.subject.keywordPhosphonium Salten_US
dc.subject.keywordPhosphorescenceen_US
dc.titleFast and Tunable Phosphorescence from Organic Ionic Crystalsen
dc.typeA1 Alkuperäisartikkeli tieteellisessä aikakauslehdessäfi
dc.type.versionpublishedVersion

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