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Peer-reviewedCC BYChemical science

Thermally activated delayed fluorescence in neutral and cationic stages of aza-nanographene decorated with 6.6.6 defects.

  • Rohith Valavil Suku1,2
  • Illia E Serdiuk3
  • Krzysztof Dzieszkowski1
  • Łukasz Orzeł1
  • Monika Kijewska4
  • Tadeusz M Muzioł5
  • Miłosz Siczek4
  • Miłosz Pawlicki1
5 affiliations
  1. 1Faculty of Chemistry, Jagiellonian University Gronostajowa 2 30-387 Kraków Poland [email protected].
  2. 2Jagiellonian University, Doctoral School of Exact and Natural Sciences Prof. St. Łojasiewicza 11 Kraków Poland.
  3. 3Faculty of Mathematics, Physics and Informatics, University of Gdansk ul. Wita Stwosza 57 80-308 Gdańsk Poland [email protected].
  4. 4Department of Chemistry, University of Wrocław F. Joliot-Curie 14 50383 Wrocław Poland.
  5. 5Department of Chemistry, UMK Gagarina 7 87-100 Toruń Poland.
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Abstract

Heteroatom-doped polycyclic aromatic hydrocarbons (PAHs) show substantially modified electron distribution caused by the presence of either an electron-rich or electron-poor element that significantly influences the optical properties of final molecules. A novel synthetic approach with a PBr₃ coupling agent, applied to precisely designed monomers and followed by intramolecular fusion, incorporates a tetraaza-dibenzo[g,p]chrysene decorated with two 6.6.6 defects into a nanographene-like system. The final derivative shows an efficient green fluorescence emission (λ PF = 530 nm) accompanied by phosphorescence (λ phos = 565 nm). The emission is tuned with simple protonation and shifted bathochromically to λ PF = 620 nm and λ phos = 640 nm. Both forms show thermally activated delayed fluorescence (TADF) with PLQYs of 93% for the green band and 50% for the red one, showing a unique ability to sustain the TADF behaviour after protonation.

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Cite

BibTeXRIS
BibTeX
@article{suku2026thermally,
  title = {{Thermally activated delayed fluorescence in neutral and cationic stages of aza-nanographene decorated with 6.6.6 defects.}},
  author = {Rohith Valavil Suku and Illia E Serdiuk and Krzysztof Dzieszkowski and Łukasz Orzeł and Monika Kijewska and Tadeusz M Muzioł and Miłosz Siczek and Miłosz Pawlicki},
  journal = {Chemical science},
  year = {2026},
  month = oct,
  doi = {10.1039/d6sc06038b},
  url = {https://europepmc.org/article/MED/42898740},
  note = {CC BY},
}
RIS
TY  - JOUR
TI  - Thermally activated delayed fluorescence in neutral and cationic stages of aza-nanographene decorated with 6.6.6 defects.
AU  - Rohith Valavil Suku
AU  - Illia E Serdiuk
AU  - Krzysztof Dzieszkowski
AU  - Łukasz Orzeł
AU  - Monika Kijewska
AU  - Tadeusz M Muzioł
AU  - Miłosz Siczek
AU  - Miłosz Pawlicki
PY  - 2026
DA  - 2026/10/09
JO  - Chemical science
DO  - 10.1039/d6sc06038b
UR  - https://europepmc.org/article/MED/42898740
AB  - Heteroatom-doped polycyclic aromatic hydrocarbons (PAHs) show substantially modified electron distribution caused by the presence of either an electron-rich or electron-poor element that significantly influences the optical properties of final molecules. A novel synthetic approach with a PBr₃ coupling agent, applied to precisely designed monomers and followed by intramolecular fusion, incorporates a tetraaza-dibenzo[g,p]chrysene decorated with two 6.6.6 defects into a nanographene-like system. The final derivative shows an efficient green fluorescence emission (λ PF = 530 nm) accompanied by phosphorescence (λ phos = 565 nm). The emission is tuned with simple protonation and shifted bathochromically to λ PF = 620 nm and λ phos = 640 nm. Both forms show thermally activated delayed fluorescence (TADF) with PLQYs of 93% for the green band and 50% for the red one, showing a unique ability to sustain the TADF behaviour after protonation.
SN  - 2041-6520
SN  - 2041-6539
ER  -