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. 2025 Jan 22;31(5):e202403645.
doi: 10.1002/chem.202403645. Epub 2024 Dec 2.

Orthogonal Functionalization of Oxo-Graphene Nanoribbons

Lucia Merkel  1 , Christof Neumann  2 , Christian E Halbig  1 , Anton Habel  1 , Xin Chen  1 , Andrey Turchanin  2 , Siegfried Eigler  1
Affiliations

Orthogonal Functionalization of Oxo-Graphene Nanoribbons

Lucia Merkel et al. Chemistry. .

Abstract

Oxo-graphene nanoribbons (oxo-GNRs) can be prepared by the oxidative unzipping of single-walled carbon nanotubes. We present an orthogonal functionalization method for the functionalization of the rims and the π-surface, respectively, what is only possible due to the high rim portion in oxo-GNRs. In particular, X-ray photoelectron spectroscopy could be used to follow the reaction and detect the marker atoms contained in the addends. We propose that the reported orthogonal functionalization strategy can also be applied on other oxo-functionalized carbon materials, such as graphene quantum dots, or reduced graphene oxide flakes.

Keywords: Graphene; Nanoribbons; Nanostructures; Orthogonal functionalization.

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Conflict of interest statement

The authors declare no conflict of interest.

Figures

Figure 1
Figure 1
Functionalization of oxo‐GNRs with hydrazine derivatives on the edges (top left), diazonium salts on the basal plane (top right) and orthogonal (bottom). The reaction conditions for the individual steps of the orthogonal synthesis remain the same as shown in the top panels for the edge and basal plane functionalization and are omitted for clarity in the bottom panel.
Figure 2
Figure 2
FTIR spectra of oxo‐GNRs and the corresponding functionalization products.
See this image and copyright information in PMC

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