Chen Zhi, Klyatskaya Svetlana, Urgel José I, Écija David, Fuhr Olaf, Auwärter Willi, Barth Johannes V, Ruben Mario
Institute of Nanotechnology (INT), Karlsruhe Institute of Technology (KIT), 76344 Eggenstein-Leopoldshafen, Germany.
Physik Department E20, Technische Universität München, 85748 Garching, Germany.
Beilstein J Nanotechnol. 2015 Jan 29;6:327-35. doi: 10.3762/bjnano.6.31. eCollection 2015.
As a continuation of our work employing polyphenylene-dicarbonitrile molecules and in particular the terphenyl derivative 1 (TDCN), we have synthesized a novel ditopic terphenyl-4,4"-di(propiolonitrile) (2) linker for the self-assembly of organic monolayers and metal coordination at interfaces. The structure of the organic linker 2 was confirmed by single crystal X-ray diffraction analysis (XRD). On the densely packed Ag(111) surface, the terphenyl-4,4"-di(propiolonitrile) linkers self-assemble in a regular, molecular chevron arrangement exhibiting a Moiré pattern. After the exposure of the molecular monolayer to a beam of Gd atoms, the propiolonitrile groups get readily involved in metal-ligand coordination interactions. Distinct coordination motifs evolve with coordination numbers varying between three and six for the laterally-bound Gd centers. The linker molecules retain an overall flat adsorption geometry. However, only networks with restricted local order were obtained, in marked contrast to previously employed, simpler polyphenylene-dicarbonitrile 1 linkers.
作为我们使用聚亚苯基二腈分子，特别是三联苯衍生物1（TDCN）工作的延续，我们合成了一种新型的双位点三联苯-4,4”-二（丙炔腈）（2）连接体，用于有机单层的自组装以及界面处的金属配位。有机连接体2的结构通过单晶X射线衍射分析（XRD）得以确认。在紧密堆积的Ag(111)表面上，三联苯-4,4”-二（丙炔腈）连接体以规则的分子人字形排列方式自组装，呈现出莫尔条纹图案。在分子单层暴露于一束Gd原子后，丙炔腈基团很容易参与金属-配体配位相互作用。对于横向结合的Gd中心，不同的配位模式随着配位数在3到6之间变化而演变。连接体分子保持整体平坦的吸附几何形状。然而，与之前使用的更简单的聚亚苯基二腈1连接体形成显著对比的是，只获得了具有受限局部有序性的网络。
