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Heptanuclear Disk-Like MII 3LnIII 4 (M = Ni, Co) Coordination Clusters: Synthesis, Structures and Magnetic Properties

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  • Kieran Griffiths
  • Chris Harding
  • Vasiliki N. Dokorou
  • Edward Loukopoulos
  • Stavroula I. Sampani
  • Alaa Abdul-Sada
  • Graham J. Tizzard
  • Simon J. Coles
  • Giulia Lorusso
  • Marco Evangelisti
  • Albert Escuer
  • George E. Kostakis
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<mark>Journal publication date</mark>8/09/2017
<mark>Journal</mark>European Journal of Inorganic Chemistry
Issue number33
Volume2017
Number of pages8
Pages (from-to)3938-3945
Publication StatusPublished
<mark>Original language</mark>English

Abstract

The synthesis, characterization, crystal structures and magnetic properties of isoskeletal heptanuclear disk-like MII 3LnIII 4 coordination clusters with the general formula [CoII 3LnIII 43-OH)6L6(CF3SO3)][(CF3SO3)5] where Ln = Gd (2), Y (3) and [NiII 3LnIII 43-OH)6L6(CF3SO3)][(CF3SO3)5] where Ln = Dy (4), Gd (5), Y (6) are presented. All the compounds are stable in solution as confirmed by ESI-MS. Magnetic studies were performed for compounds 2, 4, 5 and 6 and indicate ferromagnetic coupling while the magnetocaloric properties of 5 are characterized by ΔSm = –15.4 J kg–1 K–1 at T = 5.0 K and ΔTad = 5.9 K at T = 2.3 K, for µ0ΔH = 7 T.