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Influencing the properties of dysprosium single-molecule magnets with phosphorus donor ligands

Author

Listed:
  • Thomas Pugh

    (School of Chemistry, The University of Manchester)

  • Floriana Tuna

    (School of Chemistry, The University of Manchester
    Photon Science Institute, The University of Manchester)

  • Liviu Ungur

    (Katholieke Universiteit Leuven)

  • David Collison

    (School of Chemistry, The University of Manchester
    Photon Science Institute, The University of Manchester)

  • Eric J.L. McInnes

    (School of Chemistry, The University of Manchester
    Photon Science Institute, The University of Manchester)

  • Liviu F. Chibotaru

    (Katholieke Universiteit Leuven)

  • Richard A. Layfield

    (School of Chemistry, The University of Manchester)

Abstract

Single-molecule magnets are a type of coordination compound that can retain magnetic information at low temperatures. Single-molecule magnets based on lanthanides have accounted for many important advances, including systems with very large energy barriers to reversal of the magnetization, and a di-terbium complex that displays magnetic hysteresis up to 14 K and shows strong coercivity. Ligand design is crucial for the development of new single-molecule magnets: organometallic chemistry presents possibilities for using unconventional ligands, particularly those with soft donor groups. Here we report dysprosium single-molecule magnets with neutral and anionic phosphorus donor ligands, and show that their properties change dramatically when varying the ligand from phosphine to phosphide to phosphinidene. A phosphide-ligated, trimetallic dysprosium single-molecule magnet relaxes via the second-excited Kramers' doublet, and, when doped into a diamagnetic matrix at the single-ion level, produces a large energy barrier of 256 cm−1 and magnetic hysteresis up to 4.4 K.

Suggested Citation

  • Thomas Pugh & Floriana Tuna & Liviu Ungur & David Collison & Eric J.L. McInnes & Liviu F. Chibotaru & Richard A. Layfield, 2015. "Influencing the properties of dysprosium single-molecule magnets with phosphorus donor ligands," Nature Communications, Nature, vol. 6(1), pages 1-8, November.
    • Handle: RePEc:nat:natcom:v:6:y:2015:i:1:d:10.1038_ncomms8492
    DOI: 10.1038/ncomms8492
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