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Title: | Bridge control of photophysical properties in benzothiazole-phenoxazine emitters – from thermally activated delayed fluorescence to room temperature phosphorescence | Authors: | PAREDIS, Simon CARDEYNAELS, Tom DECKERS, Jasper Danos, Andrew VANDERZANDE, Dirk Monkman, Andrew P. Champagne, Benoit MAES, Wouter |
Issue Date: | 2022 | Publisher: | ROYAL SOC CHEMISTRY | Source: | Journal of Materials Chemistry C, 10 (12) , p. 4775-4784 | Abstract: | The bridging phenyl group in a fluorescent phenoxazine-benzothiazole donor-acceptor dyad is replaced by either a naphthalene or a thiophene moiety to probe the influence of a more extended conjugated system or the presence of a sulfur-containing heteroaromatic spacer on the emissive properties. These seemingly small structural alterations strongly affect the relative positions of the excited states, the fluorescence intensity, and the emission mechanism. Consequently, thermally activated delayed fluorescence (TADF) is observed at longer timescales for the materials with phenyl and naphthalene linkers, whereas the thiophene group promotes room temperature phosphorescence (RTP), both in the solid state and in solution, and enhances singlet oxygen generation. Phosphorescence in solution at ambient temperature from a purely organic molecule without heavy halogen functionalisation is quite rare, and this unique property calls for further specific attention. | Notes: | Maes, W (corresponding author), Hasselt Univ, Inst Mat Res IMO IMOMEC, Design & Synth Organ Semicond DSOS, Agoralaan 1, B-3590 Diepenbeek, Belgium.; Maes, W (corresponding author), IMEC, IMOMEC Div, Wetenschapspk 1, B-3590 Diepenbeek, Belgium. wouter.maes@uhasselt.be |
Document URI: | http://hdl.handle.net/1942/36628 | ISSN: | 2050-7526 | e-ISSN: | 2050-7534 | DOI: | 10.1039/d1tc04885f | ISI #: | 000742095100001 | Rights: | The Royal Society of Chemistry 2022 | Category: | A1 | Type: | Journal Contribution | Validations: | ecoom 2023 |
Appears in Collections: | Research publications |
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Bridge control of photophysical properties in benzothiazole-phenoxazine emitters.pdf | Peer-reviewed author version | 1.03 MB | Adobe PDF | View/Open |
d1tc04885f.pdf Restricted Access | Published version | 4.26 MB | Adobe PDF | View/Open Request a copy |
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