Tetragonal porous networks made by rod-like molecules on Au(1 1 1) with halogen bonds

Won Jun Jang, Kyung Hoon Chung, Min Wook Lee, Howon Kim, Sungjun Lee, Se-Jong Kahng

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

Supramolecular structures of two rod-like molecules whose both ends are terminated with Br-ligands were studied using scanning tunneling microscopy (STM). Rectangular and square porous networks were observed in 4,4″-dibromo-p-terphenyl (DBTP) and 4,4″-dibromo-p-quaterphenyl (DBQP) molecules on Au(1 1 1) with the void areas of 3.5 and 5.6 nm2, respectively. Both networks had chiral quadrupole nodes that could be explained with four Br⋯Br halogen bonds and four Br⋯H hydrogen bonds. The reversible transformations of network structures were observed in consecutive STM images, possibly mediated by a liquid phase surrounding the networks. The molecules also formed close-packing ladder-like networks with triple nodes that could be explained with four Br⋯H bonds. Our study shows that Br-ligands play key roles in forming molecular networks for both rod-like molecules.

Original languageEnglish
Pages (from-to)74-78
Number of pages5
JournalApplied Surface Science
Volume309
DOIs
Publication statusPublished - 2014 Aug 1

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ASJC Scopus subject areas

  • Surfaces, Coatings and Films

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