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Higher Acenes by On‐Surface Dehydrogenation: From Heptacene to Undecacene |
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| Authors: | Rafal Zuzak Dr. Ruth Dorel Dr. Marek Kolmer Prof. Marek Szymonski Dr. Szymon Godlewski Prof. Antonio M. Echavarren |
| Affiliation: | 1. Centre for Nanometer-Scale Science and Advanced Materials, NANOSAM, Faculty of Physics, Astronomy, and Applied Computer Science, Jagiellonian University, Kraków, Poland;2. Institute of Chemical Research of Catalonia (ICIQ), Barcelona Institute of Science and Technology, Tarragona, Spain;3. Departament de Química Orgànica i Analítica, Universitat Rovira i Virgil, Tarragona, Spain |
| Abstract: | A 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. |
| Keywords: | acenes atomic force microscopy dehydrogenation surface chemistry undecacene |