Figure 1.

Controlled desulfurization reaction. a) and b) AFM frequency‐shift images of tetracenothiophene (TCT) and tetraceno‐derivative (TC‐D) molecules, respectively. c) and d) Simulated AFM images based on DFT calculations. e) and f) Adsorption geometry of the surface‐molecule structure obtained from DFT calculations in a ball‐and‐stick representation. g) Schematic representation of the experiment; the reaction produces a step‐like feature in the I(V) trace recorded at a constant height above the thiophene unit.