Fjord-Edge Graphene Nanoribbons with Site-Specific Nitrogen Substitution.
Publication Type:Journal Article
Source:J Am Chem Soc, Volume 142, Issue 42, p.18093-18102 (2020)
<p>The synthesis of graphene nanoribbons (GNRs) that contain site-specifically substituted backbone heteroatoms is one of the essential goals that must be achieved in order to control the electronic properties of these next generation organic materials. We have exploited our recently reported solid-state topochemical polymerization/cyclization-aromatization strategy to convert the simple 1,4-bis(3-pyridyl)butadiynes into the fjord-edge nitrogen-doped graphene nanoribbon structures (fjord-edge NGNRs). Structural assignments are confirmed by CP/MAS C NMR, Raman, and XPS spectroscopy. The fjord-edge NGNRs are promising precursors for the novel backbone nitrogen-substituted NGNRs . Geometry and band calculations on NGNR indicate that this class of nanoribbons should have unusual bonding topology and metallicity.</p>