ArticleCommunications chemistry2023
On-surface synthesis of nitrogen-doped nanographene with an [18]annulene pore on Ag(111).
Article in Communications chemistry, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.
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Who cites it
4 citing papers in PubMed.
- Conjugated Macrocycles for Host-Guest Recognition and Optoelectronic Applications.Advanced materials (Deerfield Beach, Fla.) · 2026Review
- On-surface synthesis.Communications chemistry · 2024Article
- On-surface synthesis of porous graphene nanoribbons mediated by phenyl migration.Communications chemistry · 2024Article
- Predicting Organometallic Intermediates in the Surface-Assisted Ullmann Coupling of Chrysene Isomers.Molecules (Basel, Switzerland) · 2024Article
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Authors and funding
6 authors.
Funding
Abstract
On-surface synthesis is of importance to fabricate low dimensional carbon-based nanomaterials with atomic precision. Here, we synthesize nitrogen-doped nanographene with an [18]annulene pore and its dimer through sequential reactions of debromination, aryl-aryl coupling, cyclodehydrogenation and C-N coupling on Ag(111) from 3,12-dibromo-7,8-diaza[5]helicene. The inner structures of the products were characterized with scanning tunneling microscopy with a CO terminated tip at low temperature. Furthermore, the first four unoccupied electronic states of the nanographene were investigated with a combination of scanning tunneling spectroscopy and theoretical calculations. Except for the LUMO + 2 state observed at +1.3 V, the electronic states at 500 mV, 750 mV and 1.9 V were attributed to the superatom molecular orbitals at the [18]annulene pore, which were significantly shifted towards the Fermi level due to the hybridization with the confined surface state.
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