Lanthanoid Single-Ion Magnets

  • Author: ChemistryViews
  • Published: 03 September 2012
  • Copyright: Wiley-VCH Verlag GmbH & Co. KGaA
  • Source / Publisher: Journal of the American Chemical Society/ACS
  • Associated Societies: American Chemical Society (ACS), USA
thumbnail image: Lanthanoid Single-Ion Magnets

The relevance of polyoxometalates (POMs) in molecular magnetism is based on their ability to act as chelating ligands incorporating a large number of magnetic centers at specific sites of their molecular structures. Mononuclear single ion magnets offer very attractive possibilities to design new molecular nanomagnets with a control over their magnetic properties that is almost impossible to achieve with polynuclear clusters and dominant quantum effects.

F. Luis, CSIC-Universidad de Zaragoua, Spain, and colleagues report the magnetic study of a series of a robust and stable mononuclear lanthanoid-based complexes formulated as K12LnP5W30O110nH2O (Ln3+ = Tb, Dy, Ho, Er, Tm, and Yb), which are usually called “Preyssler anions”. These have been characterized with static and dynamic magnetic measurements and heat capacity experiments.

The team found that POM-based mononuclear lanthanoid complexes with 5-fold symmetry can provide new examples of single-ion magnets that exhibit magnetic hysteresis at low temperatures in the case of Dy and Ho.

Article Views: 3370

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