A fan-shaped synthetic chiral nanographene

We report the synthesis and characterization of a fan-shaped chiral nanographene 1,which is composed of 6 hexabenzocoronene subunits with 216 conjugated carbon atoms.In the dehydrocyclization reaction,38 C-C bonds are formed simultaneously.1 exhibits strong panchromatic absorption from the ultraviol...

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Bibliographic Details
Published in中国化学快报（英文版） Vol. 34; no. 2; pp. 154 - 157
Main Authors Haonan Shi, Bangyuan Xiong, Ying Chen, Chaojun Lin, Jiajian Gu, Yanpeng Zhu, Jiaobing Wang
Format Journal Article
LanguageEnglish
Published School of Chemistry,Sun Yat-sen University,Guangzhou 510275,China 2023
Subjects
Nanographene
Molecular nanocarbon
Chirality
Polycyclic aromatic hydrocarbon
Helicene
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Summary:We report the synthesis and characterization of a fan-shaped chiral nanographene 1,which is composed of 6 hexabenzocoronene subunits with 216 conjugated carbon atoms.In the dehydrocyclization reaction,38 C-C bonds are formed simultaneously.1 exhibits strong panchromatic absorption from the ultraviolet to the near-infrared,with an absorption coefficient of 209,000 L mol-1 cm-1 at 564 nm.Optically pure samples,obtained via chiral HPLC,show distinct ECD signals(|△ε|=704L mol-1 cm-1 at 405 nm).Upon excitation,1 emits near-infrared fluorescence at 820 nm with a quantum yield of 5.5％.These photophys-ical properties of 1 were analyzed with the assistance of DFT calculations.
ISSN:1001-8417