Molecular multistate systems formed in two-dimensional porous networks on Ag(111)

Kyung Hoon Chung, Howon Kim, Won Jun Jang, Jong Keon Yoon, Se Jong Kahng, Jhinhwan Lee, Seungwu Han

Research output: Contribution to journalArticlepeer-review

26 Citations (Scopus)


Host-guest interactions in porous supramolecular structures have been studied on surfaces using scanning tunneling microscopy, with anticipation of biochemical and sensor applications, but limited to cases of van der Waals interactions and hydrogen bonds. Here, we studied the intermolecular structures of 4,4″-dibromo-p-terphenyl molecules self-caged in porous supramolecular structures with halogen bonds on Ag(111). The caged molecules hopped among six different configurations at higher than 50 K, showing a propeller-like pattern. At 30 K, they stayed at one of six states that were stabilized with Br···Br halogen bonds and Br···H hydrogen bonds with energy gains of 225, 197, and 163 meV, as revealed by our density functional theory calculations. The self-caged structure provides a model system to simulate multistate supramolecular memories.

Original languageEnglish
Pages (from-to)302-306
Number of pages5
JournalJournal of Physical Chemistry C
Issue number1
Publication statusPublished - 2013 Jan 10

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • General Energy
  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films


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