Koudia Mathieu, Abel Mathieu, Maurel Christian, Bliek Ariane, Catalin Daniel, Mossoyan Mireille, Mossoyan Jean-Charles, Porte Louis
Laboratoire de Matériaux et Microélectronique de Provence (L2MP), UMR CNRS 6137, Universités Paul Cézanne, Provence et Sud Toulon Var, Case 151, Marseille, France.
J Phys Chem B. 2006 May 25;110(20):10058-62. doi: 10.1021/jp0571980.
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.
在超高真空条件下，通过扫描隧道显微镜原位研究了锌酞菁（ZnPc）和八氯锌酞菁（ZnPcCl₈）在Ag(111)表面的吸附和有序排列。观察到这两种分子形成了二维自组装超分子域。我们展示了用氯原子取代ZnPc外围一半氢原子是如何影响自组装机制的。在ZnPc分子网络中，分子间相互作用以范德华力为主导，而ZnPcCl₈分子堆积则经历了由相邻分子间形成C-Cl...H-C氢键驱动的连续相演变。在这种演变结束时，最终的分子组装涉及所有可能的氢键。我们的研究还揭示了分子-衬底相互作用的影响，这是通过在分子膜中产生条纹结构的位错线的存在来体现的。
