Ultra-narrow low-bandgap graphene nanoribbons from bromoperylenes: synthesis and terahertz-spectroscopy
Soluble ultra-narrow armchair graphene nanoribbons (AGNRs) with length of ≈20 nm and completely fused cores exceeding 5 nm in length, pronounced near-infrared (NIR) absorption up to 1400 nm, and a low band gap (≈0.9 eV) are synthesized from 3,9(3,10)-dibromoperylene and 3,4,9,10-tetrabromoperylene....
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| Dokumenttyp: | Article (Journal) Kapitel/Artikel |
| Sprache: | Englisch |
| Veröffentlicht: |
2017
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| In: | Year: 2017, Jahrgang: 23, Heft: 20, Pages: 4870-4875 |
| DOI: | 10.1002/chem.201605859 |
| Online-Zugang: | Verlag, Volltext: http://dx.doi.org/10.1002/chem.201605859 Verlag, Volltext: https://onlinelibrary.wiley.com/doi/abs/10.1002/chem.201605859 
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| Verfasserangaben: | Daniel Jänsch, Ivan Ivanov, Yulian Zagranyarski, Ivana Duznovic, Martin Baumgarten, Dimitry Turchinovich, Chen Li, Mischa Bonn and Klaus Müllen |
| Zusammenfassung: | Soluble ultra-narrow armchair graphene nanoribbons (AGNRs) with length of ≈20 nm and completely fused cores exceeding 5 nm in length, pronounced near-infrared (NIR) absorption up to 1400 nm, and a low band gap (≈0.9 eV) are synthesized from 3,9(3,10)-dibromoperylene and 3,4,9,10-tetrabromoperylene. Since the monomers are obtained from perylene carboxyanhydrides, a remarkable link between dye and graphene chemistry is established. The two-step protocol for the AGNR synthesis by aryl-aryl coupling and subsequent cyclodehydrogenation is compared with a direct Yamamoto polymerization. Ultrafast photoconductivity analysis by optical pump-terahertz (THz) probe spectroscopy of the longest AGNRs excited in the NIR regime (800 nm) reveal their high intrinsic charge carrier mobility. |
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| Beschreibung: | First published: 20 March 2017 Gesehen am 25.06.2018 |
| Beschreibung: | Online Resource |
| DOI: | 10.1002/chem.201605859 |