Higher Acenes by On‐Surface Dehydrogenation: From Heptacene to Undecacene

• DOI: 10.1002/ange.201802040
• Publication Date: 2018-05-23T14:07:36Z
• Authors: Rafal Zuzak; Ruth Dorel; Marek Kolmer; Marek Szymonski; Szymon Godlewski; Antonio M. Echava...
• Keywords: 2. Zero hunger; 02 engineering and technology; 0210 nano-technology; 01 natural sciences; Communications; 0104 chemical sciences; 3. Good health

AbstractA unified approach to the synthesis of the series of higher acenes up to previously unreported undecacene has been developed through the on‐surface dehydrogenation of partially saturated precursors. These molecules could be converted into the parent acenes by both atomic manipulation with the tip of a scanning tunneling and atomic force microscope (STM/AFM) as well as by on‐surface annealing. The structure of the generated acenes has been visualized by high‐resolution non‐contact AFM imaging and the evolution of the transport gap with the increase of the number of fused benzene rings has been determined on the basis of scanning tunneling spectroscopy (STS) measurements.