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 journalArticlepeer-review

19 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 nm 2 , 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

Bibliographical note

Funding Information:
The authors gratefully acknowledge financial support from the Ministry of Education Science and Technology of the Korean government through National Research Foundation ( 2010-0025301 and 2012-0013222 ). This study was supported by the Supercomputing Center/Korea Institute of Science and Technology Information with supercomputing resources and technical support ( KSC-2013-C1-014 ).

Keywords

  • Halogen bond
  • Intermolecular structure
  • Scanning tunneling microscopy

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Surfaces, Coatings and Films
  • Surfaces and Interfaces

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