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

Un Seung Jeon, Min Hui Chang, Won Jun Jang, Soon Hyung Lee, Seungwu Han, Se-Jong Kahng

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5 Citations (Scopus)

Abstract

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···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···Br halogen bonds because of geometrical restrictions. Our study shows that halogenated Y-shaped molecules will be useful components for building supramolecular structures.

Original languageEnglish
JournalApplied Surface Science
DOIs
Publication statusAccepted/In press - 2016 Sep 30

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Keywords

  • Halogen bond
  • Molecular nanostructures
  • Scanning tunneling microscopy
  • Self-assembly

ASJC Scopus subject areas

  • Surfaces, Coatings and Films

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