Thermally activated delayed fluorescence and high-contrast mechanochromism of anthrone-based donor-acceptor systems
Abstract
The development of materials that emit in the deep red to near-infrared region of the spectrum has attracted significant attention on account of their potential as optical sensing and imaging reagents in biology. We report herein the synthesis and optoelectronic characterization of four anthraquinone-based emitters T-tBuCz-AQ, T-MeOCz-AQ, C-tBuCz-AQ, and C-MeOCz-AQ, and two pyrazoloanthrone-based emitters tBuCz-PA and DMAC-PA. Depending on the donor, these compounds emit between 640-750 nm in the neat film, while the emission of the 10 wt% doped films in PMMA are blue-shifted to between 600-700 nm and have low photoluminescence quantum yields of between 2.6-6.6%. Of these compounds, T-tBuCz-AQ, T-MeOCz-AQ, and C-tBuCz-AQ exhibited thermally activated delayed fluorescence in 10 wt% doped films in PMMA, while the crystals of T-tBuCz-AQ also showed TADF. Compound tBuCz-PA showed highcontrast and reversible PL response upon mechanical grinding and hexane fuming.
Citation
Sudhakar , P , Slawin , A M Z & Zysman-Colman , E 2023 , ' Thermally activated delayed fluorescence and high-contrast mechanochromism of anthrone-based donor-acceptor systems ' , Frontiers in Chemistry , vol. 11 , 1248267 . https://doi.org/10.3389/fchem.2023.1248267
Publication
Frontiers in Chemistry
Status
Peer reviewed
ISSN
2296-2646Type
Journal article
Description
Funding: This project was funded by the European Union’s Horizon 2020 Research and Innovation Programme under the Marie Skłodowska-Curie grant agreement no. 891606 (TADFNIR). The authors thank the Engineering and Physical Sciences Research Council for funding (EP/P010482/1).Collections
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