title: Influence of chlorine substitution on the self-assembly of zinc phthalocyanine.
abstract: The adsorption and ordering of zinc phthalocyanine (ZnPc) and octachloro zinc phthalocyanine (ZnPcCl(8)) on an Ag(111) surface is studied in situ by scanning tunneling microscopy under ultrahigh vacuum. Two-dimensional self-assembled supramolecular domains are observed for these two molecules. We show how substituting chlorine atoms for half of the peripheral hydrogen atoms on ZnPc influences the self-assembly mechanisms. While intermolecular interactions are dominated by van der Waals forces in ZnPc molecular networks, ZnPcCl(8) molecular packing undergoes a sequential phase evolution driven by the creation of C-Cl...H-C hydrogen bonds between adjacent molecules. At the end of this evolution, the final molecular assembly involves all possible hydrogen bonds. Our study also reveals the influence of molecule-substrate interactions through the presence of fault lines generating a stripe structure in the molecular film.
authors.affiliation: Laboratoire de Matériaux et Microélectronique de Provence (L2MP), UMR CNRS 6137, Universités Paul Cézanne, Provence et Sud Toulon Var, Case 151, Marseille, France. mathieu.koudia@12mp.fr
authors.forename: Mathieu
authors.initials: M
authors.lastname: Koudia
authors.forename: Mathieu
authors.initials: M
authors.lastname: Abel
authors.forename: Christian
authors.initials: C
authors.lastname: Maurel
authors.forename: Ariane
authors.initials: A
authors.lastname: Bliek
authors.forename: Daniel
authors.initials: D
authors.lastname: Catalin
authors.forename: Mireille
authors.initials: M
authors.lastname: Mossoyan
authors.forename: Jean-Charles
authors.initials: JC
authors.lastname: Mossoyan
authors.forename: Louis
authors.initials: L
authors.lastname: Porte