The impact of donor-orientation on the emission properties of chlorinated trityl radicals
Chlorinated trityl radicals functionalized with electron-donating groups are promising red-emitting materials for optoelectronic and spintronic applications, overcoming the spin-statistical limit of conventional emitters. Donor functionalization induces charge transfer character, enhancing photolumi...
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| Hauptverfasser: | , , , , , , , , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
July 4, 2025
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| In: |
Advanced optical materials
Year: 2025, Jahrgang: 13, Heft: 19, Pages: 1-9 |
| ISSN: | 2195-1071 |
| DOI: | 10.1002/adom.202500296 |
| Online-Zugang: | Verlag, kostenfrei, Volltext: https://doi.org/10.1002/adom.202500296 Verlag, kostenfrei, Volltext: https://onlinelibrary.wiley.com/doi/abs/10.1002/adom.202500296 
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| Verfasserangaben: | Mona E. Arnold, Robert Toews, Lars Schneider, Jonas Schmid, Miftahussurur Hamidi Putra, Michael Busch, Axel Groß, Felix Deschler, Andreas Köhn, and Alexander J.C. Kuehne |
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| 245 | 1 | 4 | |a The impact of donor-orientation on the emission properties of chlorinated trityl radicals |c Mona E. Arnold, Robert Toews, Lars Schneider, Jonas Schmid, Miftahussurur Hamidi Putra, Michael Busch, Axel Groß, Felix Deschler, Andreas Köhn, and Alexander J.C. Kuehne |
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| 520 | |a Chlorinated trityl radicals functionalized with electron-donating groups are promising red-emitting materials for optoelectronic and spintronic applications, overcoming the spin-statistical limit of conventional emitters. Donor functionalization induces charge transfer character, enhancing photoluminescence quantum yield, which depends on the donor strength and its orientation. However, donor-functionalized tris(trichlorophenyl)methyl radicals often show lower quantum yield than their perchlorinated derivatives, likely due to weaker donor-acceptor electronic coupling and enhanced non-radiative decay. A novel trityl derivative is presented with two additional chlorines that restrict the orientation of the donor to a nearly perpendicular arrangement toward the trityl plane, minimizing vibronic coupling and non-radiative losses. Spectroscopic and computational studies reveal that this steric constraint improves the photoluminescence quantum yield compared to the tris(trichlorophenyl)methyl analogs. These findings highlight the potential of donor-acceptor decoupling to enable efficient, redshifted emission, offering a design strategy for high-performance radical emitters. | ||
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| 700 | 1 | |a Kuehne, Alexander J. C. |e VerfasserIn |4 aut | |
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