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Self-Assembly Synthesis of a [2]Catenane CoII Single-Molecule Magnet.

Benjamin H WilsonJas S WardDavid C YoungJun-Liang LiuCorine MathonièreRodolphe CléracPaul E Kruger
Published in: Angewandte Chemie (International ed. in English) (2021)
We describe herein the self-assembly synthesis of an octanuclear CoII [2]catenane {[Co4 (H2 L)6 ]2 16+ } formed by the mechanical interlocking of two {[Co4 (H2 L)6 ]8+ } rectangles of unprecedented topology. Subtle manipulation of the synthetic conditions allows the isolation of a mixed-valence [Co2 III /Co2 II ]10+ non-catenated rectangle. The CoII centers in the [2]catenane exhibit slow relaxation of their magnetic moment, i. e. single-molecule magnet properties, dominated by quantum tunneling and Raman relaxation processes. This work shows that metallo-supramolecular chemistry can precisely control the organization of single-molecule magnets in topologically complex arrangements.
Keyphrases
  • single molecule
  • atomic force microscopy
  • living cells
  • molecular dynamics
  • energy transfer
  • gram negative
  • high resolution
  • quantum dots
  • water soluble
  • fluorescent probe