On‐Surface Synthesis of a Dicationic Diazahexabenzocoronene Derivative on the Au(111) Surface
Open Access
- 21 September 2021
- journal article
- research article
- Published by Wiley in Angewandte Chemie
- Vol. 60 (48), 25551-25556
- https://doi.org/10.1002/anie.202111863
Abstract
The atomically precise control over the size, shape and structure of nanographenes (NGs) or the introduction of heteroatom dopants into their sp2-carbon lattice confer them valuable electronic, optical and magnetic properties. Herein, we report on the design and synthesis of a hexabenzocoronene derivative embedded with graphitic nitrogen in its honeycomb lattice, achieved via on-surface assisted cyclodehydrogenation on the Au(111) surface. Combined scanning tunneling microscopy/spectroscopy and non-contact atomic force microscopy investigations unveil the chemical and electronic structures of the obtained dicationic NG. Kelvin probe force microscopy measurements reveal a considerable variation of the local contact potential difference toward lower values with respect to the gold surface, indicative of its positive net charge. Altogether, we introduce the concept of cationic nitrogen doping of NGs on surfaces, opening new avenues for the design of novel carbon nanostructures.Keywords
Funding Information
- Comunidad de Madrid (Y2018/NMT-4783)
- Ministerio de Ciencia, Innovación y Universidades (SpOrQuMat, CTQ2017-83531-R)
- Ministerio de Ciencia Tecnología y Telecomunicaciones (PID2019-108532GB-I00)
- Ministerium für Ländliche Entwicklung, Umwelt und Landwirtschaft des Landes Brandenburg (ESF-Project GRAPHD, TU Dresden)
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