Nanoribbons with Nonalternant Topology from Fusion of Polyazulene: Carbon Allotropes beyond Graphene

Fan Q, Martin-Jimenez D, Ebeling D, Krug CK, Brechmann L, Kohlmeyer C, Hilt G, Hieringer W, Schirmeisen A, Gottfried JM (2019)

Publication Type: Journal article

Publication year: 2019

Journal

Journal of the American Chemical Society American Chemical Society

DOI: 10.1021/jacs.9b08060

Abstract

Various two-dimensional (2D) carbon allotropes with nonalternant topologies, such as pentaheptites and phagraphene, have been proposed. Predictions indicate that these metastable carbon polymorphs, which contain odd-numbered rings, possess unusual (opto)electronic properties. However, none of these materials has been achieved experimentally due to synthetic challenges. In this work, by using on-surface synthesis, nanoribbons of the nonalternant graphene allotropes, phagraphene and tetra-penta-hepta(TPH)-graphene, have been obtained by dehydrogenative C-C coupling of 2,6-polyazulene chains. These chains were formed in a preceding reaction step via on-surface Ullmann coupling of 2,6-dibromoazulene. Low-temperature scanning probe microscopies with CO-functionalized tips and density functional theory calculations have been used to elucidate their structural properties. The proposed synthesis of nonalternant carbon nanoribbons from the fusion of synthetic line-defects may pave the way for large-area preparation of novel 2D carbon allotropes. ©

Authors with CRIS profile

Wolfgang Hieringer Lehrstuhl für Theoretische Chemie

Involved external institutions

Philipps-Universität Marburg DE Germany (DE) Justus-Liebig-Universität Gießen DE Germany (DE) Carl von Ossietzky Universität Oldenburg DE Germany (DE)

How to cite

APA:

Fan, Q., Martin-Jimenez, D., Ebeling, D., Krug, C.K., Brechmann, L., Kohlmeyer, C.,... Gottfried, J.M. (2019). Nanoribbons with Nonalternant Topology from Fusion of Polyazulene: Carbon Allotropes beyond Graphene. Journal of the American Chemical Society. https://dx.doi.org/10.1021/jacs.9b08060

MLA:

Fan, Qitang, et al. "Nanoribbons with Nonalternant Topology from Fusion of Polyazulene: Carbon Allotropes beyond Graphene." Journal of the American Chemical Society (2019).

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