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Two-dimensional networks of brominated Y-shaped molecules on Au(111)

机译:Au(111)上的溴化Y形分子的二维网络

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In the design of supramolecular structures, Y-shaped molecules are useful to expand the structures in three different directions. The supramolecular structures of Y-shaped molecules with three halogen-ligands on surfaces have been extensively studied, but much less are done for those with six halogen-ligands. Here, we report on the intermolecular interactions of a Y-shaped molecule, 1,3,5-Tris(3,5-dibromophenyl) benzene, with six Br-ligands studied using scanning tunneling microscopy (STM). Honeycomb-like structures were observed on Au(111), and could be explained with chiral triple-nodes made of three Br center dot center dot center dot Br halogen bonds. Molecular models were proposed based on STM images and reproduced with density-functional theory calculations. Although the molecule has six Br-ligands, only three of them form Br center dot center dot center dot Br halogen bonds because of geometrical restrictions. Our study shows that halogenated Y-shaped molecules will be useful components for building supramolecular structures. (C) 2017 Elsevier B.V. All rights reserved.
机译:在超分子结构的设计中,Y形分子可用于在三个不同方向上扩展结构。已经广泛研究了表面上具有三个卤素配体的Y形分子的超分子结构,但是对于具有六个卤素配体的Y形分子的超分子结构却做得很少。在这里,我们报告Y型分子,1,3,5-Tris(3,5-二溴苯基)苯与使用扫描隧道显微镜(STM)研究的六个Br-配体的分子间相互作用。在Au(111)上观察到蜂窝状结构,并且可以用由三个Br中心点中心点中心点Br卤素键构成的手性三结点来解释。分子模型是根据STM图像提出的,并通过密度泛函理论计算得以复制。尽管该分子具有六个Br-配体,但是由于几何限制,它们中只有三个形成Br中心点中心点中心点Br卤素键。我们的研究表明,卤化的Y形分子将是构建超分子结构的有用成分。 (C)2017 Elsevier B.V.保留所有权利。

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