Decacene: On-Surface Generation
J. Krüger, F. Garcia, F. Eisenhut, D. Skidin, J. M. Alonso, D. Pérez, E. Guitián, F. Moresco, G. Cuniberti, D. Peña
Angewandte Chemie International Edition 56, 11945 (2017)
Acenes are intriguing molecules with unique elec- tronic properties.The difficulties in their preparation owingto low stability under ambient conditions are apparent because successful syntheses of long unsubstituted acenes are still scarce,inspite of the great attention they have attracted. Only unsubstituted acenes up to heptacene have been isolated in bulk, with nonacene being the largest acene detected to date. Herein we use on-surface assisted reduction of tetraepoxy decacene precursors on Au(111) as the key step to generate unprecedented decacene which is visualizedand its electronic resonances studied by scanning tunneling microscopy(STM) and spectroscopy(STS).