From starphenes to non-benzenoid linear conjugated polymers by substrate templating

Combining on-surface synthetic methods with the power of scanning tunneling microscopy to characterize novel materials at the single molecule level, we show how to steer the reactivity of one anthracene-based precursor towards different product nanostructures. Whereas using a Au(111) surface with th...

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Bibliographic Details
Published in:Nanoscale advances 2021-04, Vol.3 (8), p.2351-2358
Main Authors: Mohammed, Mohammed S. G, Lawrence, James, García, Fátima, Brandimarte, Pedro, Berdonces-Layunta, Alejandro, Pérez, Dolores, Sánchez-Portal, Daniel, Peña, Diego, de Oteyza, Dimas G
Format: Article
Language:English
Subjects:
Chemistry
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Summary:Combining on-surface synthetic methods with the power of scanning tunneling microscopy to characterize novel materials at the single molecule level, we show how to steer the reactivity of one anthracene-based precursor towards different product nanostructures. Whereas using a Au(111) surface with three-fold symmetry results in the dominant formation of a starphene derivative, the two-fold symmetry of a reconstructed Au(110) surface allows the selective growth of non-benzenoid linear conjugated polymers. We further assess the electronic properties of each of the observed product structures via tunneling spectroscopy and DFT calculations, altogether advancing the synthesis and characterization of molecular structures of notable scientific interest that have been only scarcely investigated to date, as applies both to starphenes and to non-benzenoid conjugated polymers. We reveal the templating effect of substrates with two-fold or three-fold symmetry on the reactivity of acene-based reactants. This allows us to choose whether to form and characterize non-benzenoid conjugated polymers or starphene-derivatives.
ISSN:2516-0230
2516-0230
DOI:10.1039/d1na00126d