Please use this identifier to cite or link to this item: http://hdl.handle.net/1942/48956
Full metadata record
DC FieldValueLanguage
dc.contributor.authorPAREDIS, Simon-
dc.contributor.authorCARDEYNAELS, Tom-
dc.contributor.authorKuila, Suman-
dc.contributor.authorDECKERS, Jasper-
dc.contributor.authorDanos, Andrew-
dc.contributor.authorLATHOUWERS, Adrian-
dc.contributor.authorVANDEWAL, Koen-
dc.contributor.authorMonkman, Andrew P.-
dc.contributor.authorChampagne, Benoit-
dc.contributor.authorVAN LANDEGHEM, Melissa-
dc.contributor.authorMAES, Wouter-
dc.date.accessioned2026-04-24T07:35:16Z-
dc.date.available2026-04-24T07:35:16Z-
dc.date.issued2026-
dc.date.submitted2026-04-20T11:57:03Z-
dc.identifier.citationThe journal of physical chemistry letters, 17 (15) , p. 4389 -4398-
dc.identifier.urihttp://hdl.handle.net/1942/48956-
dc.description.abstractStarting from well-studied coumarin laser dyes, a novel donor-pi-acceptor emitter is designed, synthesized, and investigated using quantum chemistry and spectroscopic approaches. Altering the donor unit from a freely rotating diethylamine (Coumarin 6) or 'rigidly planar' julolidine (Coumarin 545) to a highly twisted phenoxazine in the newly reported material red-shifts the emission and enables thermally activated delayed fluorescence (TADF) at the cost of a reduction in photoluminescence quantum yield. Separately, unexpected room temperature phosphorescence (RTP) is observed for Coumarin 6 in film, and both coumarins show triplet-triplet annihilation (TTA) delayed emission in solution. These delayed emission properties are explained by the contrasting structural properties of the different donor moieties and especially the availability of a twisted intramolecular charge-transfer state for Coumarin 6. Ultimately the rotational freedom of the donor enables emission mechanisms that have been previously overlooked for these primarily fluorescent laser dyes, as well as TADF for the new emitter.-
dc.description.sponsorshipACKNOWLEDGMENTS The authors thank the Research Foundation − Flanders (FWO Vlaanderen) for financial support (projects 1SB7519N, 1284623N, G087718N, G0D1521N, I006320N, and W000620N). The calculations were performed on the computers of the ‘Consortium des équipements de Calcul Intensif (CÉCI)’ (http://www.ceci-hpc.be), including those of the ‘UNamur Technological Platform of High-Performance Computing (PTCI)’ (http://www.ptci.unamur.be), for which we gratefully acknowledge financial support from the FNRSFRFC, the Walloon Region, and the University of Namur (Conventions No. GEQ U.G006.15, U.G018.19, U.G011.22, RW/GEQ2016, RW1610468, and RW2110213). A.P. Monkman is supported by EPSRC grant EP/T02240X/1.-
dc.language.isoen-
dc.publisherAMER CHEMICAL SOC-
dc.rightsThe Authors. Published by American Chemical Society. This article is licensed under CC-BY 4.0-
dc.titleEffects of Donor Rigidity on Coumarin Delayed Emission: New Tricks from Old Materials-
dc.typeJournal Contribution-
dc.identifier.epage4398-
dc.identifier.issue15-
dc.identifier.spage4389-
dc.identifier.volume17-
local.format.pages10-
local.bibliographicCitation.jcatA1-
dc.description.notesMaes, W (corresponding author), Hasselt Univ, Inst Mat Res Imo Imomec, Design & Synth Organ Semicond DSOS, B-3500 Hasselt, Belgium.; Maes, W (corresponding author), Imec, Imo Imomec, B-3590 Diepenbeek, Belgium.; Danos, A (corresponding author), Univ Durham, Dept Phys, OEM Grp, South Rd, Durham DH1 3LE, England.; Danos, A (corresponding author), Queen Mary Univ London, Sch Phys & Chem Sci, London E1 4NS, England.-
dc.description.notesa.danos@qmul.ac.uk; wouter.maes@uhasselt.be-
local.publisher.place1155 16TH ST, NW, WASHINGTON, DC 20036 USA-
local.type.refereedRefereed-
local.type.specifiedArticle-
dc.identifier.doi10.1021/acs.jpclett.6c00210-
dc.identifier.pmid41943237-
dc.identifier.isiWOS:001734597700001-
dc.identifier.eissn-
local.provider.typewosris-
local.description.affiliation[Paredis, Simon; Cardeynaels, Tom; Deckers, Jasper; Lathouwers, Adrian; Maes, Wouter] Hasselt Univ, Inst Mat Res Imo Imomec, Design & Synth Organ Semicond DSOS, B-3500 Hasselt, Belgium.-
local.description.affiliation[Paredis, Simon; Cardeynaels, Tom; Deckers, Jasper; Lathouwers, Adrian; Van Landeghem, Melissa; Vandewal, Koen; Maes, Wouter] Imec, Imo Imomec, B-3590 Diepenbeek, Belgium.-
local.description.affiliation[Cardeynaels, Tom; Champagne, Benoit] Univ Namur, Namur Inst Struct Matter, Theoret & Struct Phys Chem Unit, Lab Theoret Chem, B-5000 Namur, Belgium.-
local.description.affiliation[Kuila, Suman; Danos, Andrew; Monkman, Andrew P.] Univ Durham, Dept Phys, OEM Grp, South Rd, Durham DH1 3LE, England.-
local.description.affiliation[Van Landeghem, Melissa; Vandewal, Koen] Hasselt Univ, Inst Mat Res Imo Imomec, Organ Optoelect OOE, B-3500 Hasselt, Belgium.-
local.description.affiliation[Danos, Andrew] Queen Mary Univ London, Sch Phys & Chem Sci, London E1 4NS, England.-
local.uhasselt.internationalyes-
item.fullcitationPAREDIS, Simon; CARDEYNAELS, Tom; Kuila, Suman; DECKERS, Jasper; Danos, Andrew; LATHOUWERS, Adrian; VANDEWAL, Koen; Monkman, Andrew P.; Champagne, Benoit; VAN LANDEGHEM, Melissa & MAES, Wouter (2026) Effects of Donor Rigidity on Coumarin Delayed Emission: New Tricks from Old Materials. In: The journal of physical chemistry letters, 17 (15) , p. 4389 -4398.-
item.fulltextWith Fulltext-
item.contributorPAREDIS, Simon-
item.contributorCARDEYNAELS, Tom-
item.contributorKuila, Suman-
item.contributorDECKERS, Jasper-
item.contributorDanos, Andrew-
item.contributorLATHOUWERS, Adrian-
item.contributorVANDEWAL, Koen-
item.contributorMonkman, Andrew P.-
item.contributorChampagne, Benoit-
item.contributorVAN LANDEGHEM, Melissa-
item.contributorMAES, Wouter-
item.accessRightsOpen Access-
crisitem.journal.issn1948-7185-
Appears in Collections:Research publications
Files in This Item:
File Description SizeFormat 
acs.jpclett.pdfPublished version8.43 MBAdobe PDFView/Open
Show simple item record

Google ScholarTM

Check

Altmetric


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.