Zusammenfassung

Adsorbed in a planar manner on bilayer NaCl(001)/Cu(111), a 1,8-dibrominated naphthalene moiety is debrominated by applying voltage pulses with a scanning tunnelling microscope, and it is subsequently isomerized by additional voltage pulses to a fused 5- and 7-membered-ring system (dehydroazulene moiety). The positions of the 5- and 7-membered rings are demonstrated to be reversibly switchable.