Bending nanofibers into nanospirals: Coordination chemistry as a tool for shaping hydrophobic assemblies

Elizaveta Kossoy, Haim Weissman, Boris Rybtchinski

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

In the current work, we demonstrate how coordination chemistry can be employed to direct self-assembly based on strong hydrophobic interactions. To investigate the influence of coordination sphere geometry on aqueous self-assembly, we synthesized complexes of the amphiphilic perylene diimide terpyridine ligand with the first-row transition-metal centers (zinc, cobalt, and nickel). In aqueous medium, aggregation of these complexes is induced by hydrophobic interactions between the ligands. However, the final shapes of the resulting assemblies depend on the preferred geometry of the coordination spheres typical for the particular metal center. The self-assembly process was characterized by UV/Vis spectroscopy, zeta potential measurements, and cryogenic transmission electron microscopy (cryo-TEM). Coordination of zinc(II) and cobalt(II) leads to the formation of unique nanospiral assemblies, whereas complexation of nickel( II) leads to the formation of straight nanofibers. Notably, coordination bonds are utilized not as connectors between elementary building blocks, but as directing interactions, enabling control over supramolecular geometry.

Original languageEnglish
Pages (from-to)166-176
Number of pages11
JournalChemistry - A European Journal
Volume21
Issue number1
DOIs
Publication statusPublished - Jan 2 2015

    Fingerprint

Keywords

  • Coordination modes
  • Hydrophobic interactions
  • Nanostructures
  • Self-assembly
  • Spirals
  • Water

ASJC Scopus subject areas

  • Catalysis
  • Organic Chemistry

Cite this