Oligomerization of Dehydrogenated Polycyclic Aromatic Hydrocarbons on Highly Oriented Pyrolytic Graphite
| Autor: | Jean-François Greisch, Artur Böttcher, Jürgen Weippert, Klaus Müllen, Akimitsu Narita, Jakob Hauns, Manfred M. Kappes, Julian Bachmann |
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| Přispěvatelé: | Publica |
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Materials science
02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Photochemistry 01 natural sciences Coronene 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials Pentacene chemistry.chemical_compound General Energy Hexabenzocoronene chemistry Highly oriented pyrolytic graphite Dehydrogenation Physical and Theoretical Chemistry 0210 nano-technology Dicoronylene Rubrene Electron ionization |
| Popis: | Electron impact ionization was used to generate dehydrogenated monocationic fragments of polycyclic aromatic hydrocarbons (PAHs) coronene, pentacene, hexabenzocoronene, dicoronylene, and rubrene. Upon mass-selective soft-landing deposition onto highly oriented pyrolytic graphite (HOPG) surfaces, these dehydrogenated monomeric species can form strongly bound dimers and oligomers interlinked via newly formed annulated benzene rings as detected by subsequent desorption experiments. The oligomerization degree can be influenced by varying the cation beam composition. The largest desorbable oligomers ranged up to pentamers for both coronene and pentacene fragments. PAH oligomers formed in this way can be considered as short sublimable graphene nanoribbons (GNRs). |
| Databáze: | OpenAIRE |
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