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dc.contributor.authorDos Santos, John
dc.contributor.authorSun, Dianming
dc.contributor.authorNaranjo, Juan
dc.contributor.authorHall, David
dc.contributor.authorZinna, Francesco
dc.contributor.authorRyan, Seán
dc.contributor.authorShi, Wenda
dc.contributor.authorMatulaitis, Tomas
dc.contributor.authorCordes, David Bradford
dc.contributor.authorSlawin, Alexandra Martha Zoya
dc.contributor.authorBeljonne, David
dc.contributor.authorWarriner, Stuart
dc.contributor.authorOlivier, Yoann
dc.contributor.authorFuchter, Matthew
dc.contributor.authorZysman-Colman, Eli
dc.identifier.citationDos Santos , J , Sun , D , Naranjo , J , Hall , D , Zinna , F , Ryan , S , Shi , W , Matulaitis , T , Cordes , D B , Slawin , A M Z , Beljonne , D , Warriner , S , Olivier , Y , Fuchter , M & Zysman-Colman , E 2022 , ' An S-shaped double helicene showing both multi-resonance thermally activated delayed fluorescence and circularly polarized luminescence ' , Journal of Materials Chemistry C , vol. 10 , no. 12 , pp. 4861-4870 .
dc.identifier.otherPURE: 277631324
dc.identifier.otherPURE UUID: c7f8b62c-4452-430e-a704-a488878c8d39
dc.identifier.otherORCID: /0000-0002-9527-6418/work/107718074
dc.identifier.otherORCID: /0000-0002-5366-9168/work/107718113
dc.identifier.otherORCID: /0000-0001-7183-6022/work/107718252
dc.identifier.otherORCID: /0000-0003-0470-7356/work/107718348
dc.identifier.otherWOS: 000750466200001
dc.identifier.otherScopus: 85127942640
dc.descriptionFunding: Scottish Funding Council (SFC/AN/08/020), Leverhulme Trust (RPG-2016-047), H2020 Marie Skłodowska-Curie Actions (838009, 859752), UK Engineering and Physical Sciences Research Council (EP/P010482/1, EP/R00188X/1), Royal Society (SRF\R1\201089), Fonds De La Recherche Scientifique - FNRS (2.5020.11, F.4534.21), Università di Pisa (PRA 2020_21).en
dc.description.abstractWe present the first example of a multi-resonant thermally activated delayed fluorescent (MR-TADF) extended helicene, Hel-DiDiKTa. This S-shaped double helicene exhibits sky-blue emission, a singlet-triplet energy gap, ΔEST, of 0.15 eV and narrow emission at a peak maximum of 473 nm with a full-width at half-maximum of 44 nm in toluene. The MR-TADF character is confirmed by the small degree of positive solvatochromism and temperature-dependent increase in intensity of the delayed emission. The chiroptical properties of the separated enantiomers are similar to other large helicenes with comparable dissymmetry values, but with the added benefit of MR-TADF. (P)-Hel-DiDiKTa is stable towards enantiomerization, with a Gibbs free energy of activation for enantiomerization (ΔGe‡) of 31± 2 kcal mol-1 at 298 K, a value similar to other reported double helicenes. (P)-Hel-DiDiKTa is also thermally stable, with a 5% weight loss at 399 oC revealed by thermogravimetric analysis (TGA). Thus, this study further strengthens the burgeoning area of chiral TADF emitters for use in cutting-edge optoelectronic and photocatalytic molecules and materials.
dc.relation.ispartofJournal of Materials Chemistry Cen
dc.rightsCopyright © 2022 The Author(s). Open Access Article. This article is licensed under aCreative Commons Attribution 3.0 Unported Licence.en
dc.subjectCircular dichroismen
dc.subjectCircularly polarized luminescenceen
dc.subjectHelical structureen
dc.subjectMulti-resonant thermally activated delayed fluorescenceen
dc.subjectNarrow emissionen
dc.subjectQD Chemistryen
dc.titleAn S-shaped double helicene showing both multi-resonance thermally activated delayed fluorescence and circularly polarized luminescenceen
dc.typeJournal articleen
dc.contributor.sponsorThe Leverhulme Trusten
dc.contributor.sponsorEuropean Commissionen
dc.contributor.sponsorThe Royal Societyen
dc.description.versionPublisher PDFen
dc.contributor.institutionUniversity of St Andrews. School of Chemistryen
dc.contributor.institutionUniversity of St Andrews. EaSTCHEMen
dc.description.statusPeer revieweden

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