Helical Bilayer Nonbenzenoid Nanographene Bearing a (10) Helicene with Two Embedded Heptagons

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Abstract: The precision synthesis of helical bilayer nanographenes (NGs) with new topology is of substantial interest because of their exotic physicochemical properties. However, helical bilayer NGs bearing non‐hexagonal rings remain synthetically challenging. Here we present the efficient synthesis of the first helical bilayer nonbenzenoid nanographene (HBNG1) from a tailor‐made azulene‐embedded precursor, which contains a novel [10]helicene backbone with two embedded heptagons. Single‐crystal X‐ray analysis reveals its highly twisted bilayer geometry with a record small interlayer distance of 3.2 Å among the reported helical bilayer NGs. Notably, the close interlayer distance between the two layers offers intramolecular through‐space conjugation as revealed by in situ spectroelectrochemistry studies together with DFT simulations. Furthermore, the chiroptical properties of the P/M enantiomers of HBNG1 are also evaluated by circular dichroism and circularly polarized luminescence.

Location: Deutsche Nationalbibliothek Frankfurt am Main

Extent: Online-Ressource

Language: Englisch

Bibliographic citation: Helical Bilayer Nonbenzenoid Nanographene Bearing a (10) Helicene with Two Embedded Heptagons ; day:20 ; month:12 ; year:2022 ; extent:7
Angewandte Chemie / International edition. International edition ; (20.12.2022) (gesamt 7)

Creator: Yang, Lin
Ju, Yang‐Yang
Medel, Miguel A.
Fu, Yubin
Komber, Hartmut
Dmitrieva, Evgenia
Zhang, Jin‐Jiang
Obermann, Sebastian
Campaña, Araceli G.
Ma, Ji
Feng, Xinliang

DOI: 10.1002/anie.202216193

URN: urn:nbn:de:101:1-2022122114132982027420

Rights: Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.

Last update: 15.08.2025, 7:33 AM CEST

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Associated

Yang, Lin
Ju, Yang‐Yang
Medel, Miguel A.
Fu, Yubin
Komber, Hartmut
Dmitrieva, Evgenia
Zhang, Jin‐Jiang
Obermann, Sebastian
Campaña, Araceli G.
Ma, Ji
Feng, Xinliang

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