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Dehydrative π-extension to nanographenes with zig-zag edges.

Abstract：

:Zig-zag nanographenes are promising candidates for the applications in organic electronics due to the electronic properties induced by their periphery. However, the synthetic access to these compounds remains virtually unexplored. There is a lack in efficient and mild strategies origins in the reduced stability, increased reactivity, and low solubility of these compounds. Herein we report a facile access to pristine zig-zag nanographenes, utilizing an acid-promoted intramolecular reductive cyclization of arylaldehydes, and demonstrate a three-step route to nanographenes constituted of angularly fused tetracenes or pentacenes. The mild conditions are scalable to gram quantities and give insoluble nanostructures in close to quantitative yields. The strategy allows the synthesis of elusive low bandgap nanographenes, with values as low as 1.62 eV. Compared to their linear homologues, the structures have an increased stability in the solid-state, even though computational analyses show distinct diradical character. The structures were confirmed by X-ray diffraction or scanning tunneling microscopy.

journal_name

Nat Commun

journal_title

Nature communications

authors

Lungerich D,Papaianina O,Feofanov M,Liu J,Devarajulu M,Troyanov SI,Maier S,Amsharov K

doi

10.1038/s41467-018-07095-z

subject

Has Abstract

pub_date

2018-11-12 00:00:00

pages

4756

issue

1

issn

2041-1723

pii

10.1038/s41467-018-07095-z

journal_volume

9

pub_type

杂志文章

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