A parallelogram metallomacrocycle bearing self-catenation and its derivative supramolecular isomerism

Chem Commun (Camb). 2020 Jul 28;56(60):8444-8447. doi: 10.1039/d0cc02877k.

Abstract

Macrocycle-based architectures are of importance in synthetic chemistry. Here, a novel parallelogram metallomacrocycle Fe2(LA)2 with reversible structural transformation was designed and synthesized. The template-free metalla[2]catenane [Fe2(LA)2]2 could be obtained by changing the concentration and has been monitored on the basis of NMR analysis. By redesigning the metallo-ligand, a catenane-like intersected parallelogram assembly with two shape-persistent supramolecular isomers was achieved. This work develops the field of terpyridine-based macrocycle system research and is valuable for obtaining other types of supramolecular isomerism.

MeSH terms

  • Anthracenes / chemistry*
  • Iron / chemistry
  • Isomerism
  • Ligands
  • Macromolecular Substances / chemistry*
  • Magnetic Resonance Spectroscopy
  • Pyridines / chemistry
  • Spectrometry, Mass, Electrospray Ionization

Substances

  • Anthracenes
  • Ligands
  • Macromolecular Substances
  • Pyridines
  • catenane
  • Iron