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Fluoranthene-containing distorted nanographenes exhibiting two-photon absorption response

Two distorted nanographenes combining helicenes and a fluoranthene unit within their polycyclic scaffolds were synthesized. Their structural and electronic properties were elucidated by various spectroscopic methods, and the experimental data were corroborated computationally. The optical and electr...

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Main Authors: Bergner, John (Author) , Páez, José L. (Author) , Maçôas, Ermelinda (Author) , Álvaro-Martins, Maria (Author) , Borstelmann, Jan (Author) , Misselwitz, Erik (Author) , Rominger, Frank (Author) , Cruz, Carlos M. (Author) , Kivala, Milan (Author) , Campaña, Araceli G. (Author)
Format: Article (Journal)
Language:English
Published: September 2, 2025
In: Organic letters
Year: 2025, Volume: 27, Issue: 36, Pages: 9933-9938
ISSN:1523-7052
DOI:10.1021/acs.orglett.5c02904
Online Access:Resolving-System, kostenfrei, Volltext: https://doi.org/10.1021/acs.orglett.5c02904
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Author Notes:John Bergner, José L. Páez, Ermelinda Maçôas, Maria Álvaro-Martins, Jan Borstelmann, Erik Misselwitz, Frank Rominger, Carlos M. Cruz, Milan Kivala, and Araceli G. Campaña
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Summary:Two distorted nanographenes combining helicenes and a fluoranthene unit within their polycyclic scaffolds were synthesized. Their structural and electronic properties were elucidated by various spectroscopic methods, and the experimental data were corroborated computationally. The optical and electrochemical properties of the nanographenes were evaluated. The compounds exhibit an improved two-photon absorption cross-section compared to their seven-membered ring-containing counterparts reported previously by us. These results provide important insights into how the incorporation of a pentagonal ring affects two-photon absorption properties of nanographenes. Moreover, one of the nanographenes is chiral and was obtained enantiomerically pure after chiral separation, allowing the study of its chiroptical properties both in absorption (electronic circular dichroism) and emission (circularly polarized luminescence).
Item Description:Gesehen am 16.02.2026
Physical Description:Online Resource
ISSN:1523-7052
DOI:10.1021/acs.orglett.5c02904

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