Formation of Halogen Bond-Based 2D Supramolecular Assemblies by Electric Manipulation
Formation of Halogen Bond-Based 2D Supramolecular Assemblies by Electric Manipulation
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通过电操作形成基于卤素键的二维超分子组装体
DOI：
10.1021/jacs.5b02206
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发表时间：
2015
影响因子：
15
通讯作者：
Wan Li-Jun
中科院分区：
文献类型：
--
作者：
Zheng Qing-Na;Liu Xuan-He;Chen Ting;Yan Hui-Juan;Cook Timothy;Wang Dong;Stang Peter J.;Wan Li-Jun
卤素键作为超分子组装和晶体工程的重要推动力，近年来备受关注。在此，我们首次展示了使用乙炔吡啶和芳基卤化物基构建块在石墨表面形成基于卤素键的开放多孔网络。我们发现扫描隧道显微镜（STM）尖端的电刺激可以诱导在末端吡啶基和全氟碘苯之间形成卤素键的基础上形成二元超分子结构。这种电操作方法可以通过选择具有不同对称性的卤素键供体和受体片段来设计一系列线性或多孔结构，因为方向相互作用最终决定了结构结果。
Halogen bonding has attracted much attention recently as an important driving force for supramolecular assembly and crystal engineering. Herein, we demonstrate for the first time the formation of a halogen bond-based open porous network on a graphite surface using ethynylpyridine and aryl-halide based building blocks. We found that the electrical stimuli of a scanning tunneling microscopy (STM) tip can induce the formation of a binary supramolecular structure on the basis of halogen bond formation between terminal pyridyl groups and perfluoro-iodobenzene. This electrical manipulation method can be applied to engineer a series of linear or porous structures by selecting halogen bond donor and acceptor fragments with different symmetries, as the directional interactions ultimately determine the structural outcome.