After post-annealing the BOPHY/Ag(111) sample at 370 K, longer molecular chains, (BOPHY-Ag)n, are formed (see Figure ), whose elongated slabs can be better appreciated in the STM image of Figure . The periodicity between monomers does not change with respect to the RT phase, indicating that only the length of the BOPHYbased metal-organic oligomers has changed. As it is shown in the XPS spectra of Figure , upon annealing the system at 370 K, the I-C signal in both C 1s and I 3d emissions disappears, while the C-Ag component increases its intensity from 12% (at RT) to 16% (at 370 K), in excellent agreement with the total activation of the I-BOPHY-I molecules. This result indicates a total dehalogenation of the I-BOPHY-I molecules on the surface. Additionally, the shape of F 1s XPS peak does not change after post-annealing, confirming the stability of the molecule on the surface.