Folding of coordination polymers into double-stranded helical organization

Ho Joong Kim, Eunji Lee, Min Gyu Kim, Min Cheol Kim, Myongsoo Lee, Eunji Sim

Research output: Contribution to journalArticle

31 Citations (Scopus)

Abstract

Self-assembling coordination polymers based on PdII and Cu II metal ions were prepared from complexation of a bent-shaped bispyridine ligand and a corresponding transition metal. These coordination polymers were observed to self-assemble into supramolecular structures that differ significantly depending on the coordination geometry of the metal center. The polymer based on PdII self-assembles into a layer structure formed by bridging bispyri dine ligands connected in a trans-position of the square-planar coordination geometry of metal center. In contrast, the polymer based on CuII adopts a double-helical conformation with regular grooves, driven by interstranded, copper-chloride dimeric interaction. The double-stranded helical organization is further confirmed by structure optimization from density functional theory with aromatic framework, showing that the optimized double-helical structure is energetically favorable and consistent with the experimental results. These results demonstrate that weak metal-ligand bridging interactions can provide a useful strategy to construct stable double-stranded helical nanotubes.

Original languageEnglish
Pages (from-to)3883-3888
Number of pages6
JournalChemistry - A European Journal
Volume14
Issue number13
DOIs
Publication statusPublished - 2008 Apr 28

All Science Journal Classification (ASJC) codes

  • Catalysis
  • Organic Chemistry

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