Liu J, Mishra S, Pignedoli CA, Passerone D, Urgel JI, Fabrizio A, Lohr TG, Ma J, Komber H, Baumgarten M, Corminboeuf C, Berger R, Ruffieux P, Muellen K, Fasel R, Feng X (2019)
Publication Type: Journal article
Publication year: 2019
Book Volume: 141
Pages Range: 12011-12020
Journal Issue: 30
DOI: 10.1021/jacs.9b04718
Nonbenzenoid carbocyclic rings are postulated to serve as important structural elements toward tuning the chemical and electronic properties of extended polycyclic aromatic hydrocarbons (PAHs, or namely nanographenes), necessitating a rational and atomically precise synthetic approach toward their fabrication. Here, using a combined bottom-up in-solution and on-surface synthetic approach, we report the synthesis of nonbenzenoid open-shell nanographenes containing two pairs of embedded pentagonal and heptagonal rings. Extensive characterization of the resultant nanographene in solution shows a low optical gap, and an open-shell singlet ground state with a low singlet-triplet gap. Employing ultra-high-resolution scanning tunneling microscopy and spectroscopy, we conduct atomic-scale structural and electronic studies on a cyclopenta-fused derivative on a Au(111) surface. The resultant five to seven rings embedded nanographene displays an extremely narrow energy gap of 0.27 eV and exhibits a pronounced open-shell biradical character close to 1 (y
APA:
Liu, J., Mishra, S., Pignedoli, C.A., Passerone, D., Urgel, J.I., Fabrizio, A.,... Feng, X. (2019). Open-Shell Nonbenzenoid Nanographenes Containing Two Pairs of Pentagonal and Heptagonal Rings. Journal of the American Chemical Society, 141(30), 12011-12020. https://doi.org/10.1021/jacs.9b04718
MLA:
Liu, Junzhi, et al. "Open-Shell Nonbenzenoid Nanographenes Containing Two Pairs of Pentagonal and Heptagonal Rings." Journal of the American Chemical Society 141.30 (2019): 12011-12020.
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