Control and transferability of magnetic interactions in supramolecular structures: trimers of {Cr7Ni} antiferromagnetic rings.

Selena J. Lockyer, Deepak Asthana, George Whitehead, Inigo Vitorica-Yrezabal, Grigore Timco, Eric Mcinnes, Richard Winpenny

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Abstract

We demonstrate here a synthetic strategy to prepare two distinct trimers of antiferromagnetically coupled {Cr7Ni} rings, substantially varying the magnetic interactions between the spin centres. The interactions were studied using multi-frequency cw EPR: in a trimer linked via non-covalent H-bonding interactions no measurable interaction between rings was seen, while in a trimer linked via iso-nicotinate groups isotropic and anisotropic exchange interactions of +0.42 and -0.8 GHz, respectively, were observed. The latter are the same as those for a simpler hetero-dimer system, showing how the spin-spin interactions can be built in a predictable and modular manner in these systems.
Original languageEnglish
Article numbere202302360
JournalChemistry: A European Journal
Early online date22 Sept 2023
DOIs
Publication statusE-pub ahead of print - 22 Sept 2023

Keywords

  • Heterometallic rings
  • Antiferromagnetically coupled
  • Chiral rings
  • Qubit
  • Multi-spin system

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