Yang Zhi-Yong, Gan Li-Hua, Lei Sheng-Bin, Wan Li-Jun, Wang Chen, Jiang Jian-Zhuang
Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, China.
J Phys Chem B. 2005 Oct 27;109(42):19859-65. doi: 10.1021/jp052216z.
Self-assemblies of octakis(octyloxy) phthalocyanine (PcOC8) and its sandwich lanthanide complex, substituted praseodymium bis(phthalocyanine) (Pr(PcOC8)(2)), with oligo(phenylene-ethynylene) (OPE) have been investigated by scanning tunneling microscopy (STM) on a highly oriented pyrolytic graphite (HOPG) surface. The assemblies were prepared by dissolving the molecules in phenyloctane solution. It was found that both PcOC8 and Pr(PcOC8)(2) can form 4-fold or 6-fold symmetrical adlayers on HOPG. The intramolecular structure of Pr(PcOC8)(2) molecule was revealed by a high-resolution STM image. When OPE molecules are added into phenyloctane solvent, Pr(PcOC8)(2) molecules prefer to form an ordered adlayer at the top of the OPE adlayer, while PcOC8 molecules adsorb on HOPG surface directly and form separated domains with OPE. These results may be helpful to construct surface assemblies and develop molecular electronic devices in the future.
通过扫描隧道显微镜（STM）在高度取向热解石墨（HOPG）表面研究了八（辛氧基）酞菁（PcOC8）及其夹心镧系配合物——取代双（酞菁）镨（Pr(PcOC8)₂）与亚苯基乙炔（OPE）的自组装。这些组装体通过将分子溶解在苯基辛烷溶液中制备。发现PcOC8和Pr(PcOC8)₂都能在HOPG上形成四重或六重对称的吸附层。通过高分辨率STM图像揭示了Pr(PcOC8)₂分子的分子内结构。当将OPE分子添加到苯基辛烷溶剂中时，Pr(PcOC8)₂分子倾向于在OPE吸附层顶部形成有序吸附层，而PcOC8分子直接吸附在HOPG表面并与OPE形成分离的区域。这些结果可能有助于未来构建表面组装体并开发分子电子器件。
