NBN-doped nanographene embedded with five-and seven-membered rings on Au(111) surface |
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| Institution: | 1.Institute of Physics and University of Chinese Academy of Sciences, Beijing 100190, China;2.Center for Advancing Electronics Dresden(cfaed) & Faculty of Chemistry and Food Chemistry, Technische Universität Dresden, 01062 Dresden, Germany;3.Department of Chemistry and State Key Laboratory of Synthetic Chemistry, The University of Hong Kong, Hong Kong, China;4.CAS Center for Excellence in Topological Quantum Computation, University of Chinese Academy of Sciences, Beijing 100190, China |
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| Abstract: | Nanographenes(NGs) can be embedded with predesigned dopants or nonhexagonal rings to tailor the electronic properties and provide ideal platforms to study the unique physical and chemical properties. Here, we report the onsurface synthesis of NBN-doped NG embedded with five-and seven-membered rings(NBN-575-NG) on Au(111) from a oligophenylene precursor preinstalled with a NBN unit and a heptagonal ring. Scanning tunneling microscopy and noncontact atomic force microscopy images elucidate the intramolecular cyclodehydrogenation and the existence of the fiveand seven-membered rings. Scanning tunneling spectroscopy spectra reveal that the NBN-575-NG is a semiconductor,which agrees with the density functional theory calculation results on a freestanding NBN-575-NG with the same structure.This work provides a feasible approach for the on-surface synthesis of novel NGs containing non-hexagonal rings. |
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| Keywords: | on-surface synthesis nanographene nonhexagonal rings scanning tunneling microscopy density functional theory |
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