On?Surface Synthesis of a Dicationic Diazahexabenzocoronene Derivative on the Au(111) Surface

The atomically precise control over the size, shape and structure of nanographenes (NGs) or introduction heteroatom dopants into their sp2-carbon lattice confer them valuable electronic, optical magnetic properties. Herein, we report on design synthesis a hexabenzocoronene derivative embedded with graphitic nitrogen in its honeycomb lattice, achieved via on-surface assisted cyclodehydrogenation Au(111) surface. Combined scanning tunnelling microscopy/spectroscopy non-contact atomic force microscopy investigations unveil chemical electronic structures obtained dicationic NG. Kelvin probe measurements reveal considerable variation local contact potential difference toward lower values respect to gold surface, indicative positive net charge. Altogether, introduce concept cationic doping NGs surfaces, opening new avenues for novel carbon nanostructures.