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Spectroscopic characterization of the on-surface induced (cyclo)dehydrogenation of a N-heteroaromatic compound on noble metal surfaces

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Abstract

New nanoarchitectures can be built from polycyclic aromatic hydrocarbons (PAHs) by exploiting the capability of some metal surfaces for inducing cyclodehydrogenation reactions. This bottom-up approach allows the formation of nanostructures with a different dimensionality from the same precursor as a consequence of the diffusion and coupling of the PAHs adsorbed on the surface. In this work we present a thorough study, by means of a combination of X-ray photoemission spectroscopy, near-edge X-ray absorption fine structure and scanning tunneling microscopy with first principle calculations of the structural and chemical transformations undergone by pyridyl-substituted dibenzo[5]helicene on three coinage surfaces, namely Cu(110), Cu(111) and Au(111). Upon annealing, on-surface chemical reactions are promoted affecting the adsorbate/substrate and the molecule/molecule interactions. This thermally induced process favours the transformation from diffusing isolated molecules to polymeric nanographene chains and finally to N-doped graphene.

Graphical abstract: Spectroscopic characterization of the on-surface induced (cyclo)dehydrogenation of a N-heteroaromatic compound on noble metal surfaces

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Publication details

The article was received on 13 Jun 2017, accepted on 29 Jul 2017 and first published on 31 Jul 2017


Article type: Paper
DOI: 10.1039/C7CP03955G
Citation: Phys. Chem. Chem. Phys., 2017, Advance Article
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    Spectroscopic characterization of the on-surface induced (cyclo)dehydrogenation of a N-heteroaromatic compound on noble metal surfaces

    I. Palacio, A. L. Pinardi, J. I. Martínez, A. Preobrajenski, A. Cossaro, A. Jancarik, I. Stará, I. Starý, J. Méndez, J. A. Martín-Gago and M. F. López, Phys. Chem. Chem. Phys., 2017, Advance Article , DOI: 10.1039/C7CP03955G

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