Chemical trend on the lanthanide-radical exchange coupling

Takayuki Ishida, Takeshi Nakamura, Takumi Kihara, Hiroyuki Nojiri

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

From the high-frequency electron paramagnetic resonance spectra on [Ln(hfac)3(TMIO)2] (Ln = Tb, Dy; TMIO = 1,1,3,3-tetramethylisoindolin-2-oxyl; hfac = 1,1,1,5,5,5-hexafluoropentane-2,4-dionate) the level-crossing fields of the radical signal of the Tb and Dy complexes were determined to be 21.9(3) and 20(2) T, respectively. The observation of a single signal is consistent with the two-fold molecular symmetry. The coupling constants were evaluated, giving JTb-rad/kB = −4.47(4) K and JDy-rad/kB = −3.2(4) K. Since the exchange coupling constant in [Gd(hfac)3(TMIO)2] has already been determined to be JGd-rad/kB = −12.5(4) K from the magnetic susceptibility measurements, the lanthanide-dependence on |JLn-rad| was concluded as |JGd-rad| > |JTb-rad| > |JDy-rad| in this series.

Original languageEnglish
Pages (from-to)149-154
Number of pages6
JournalPolyhedron
Volume136
DOIs
Publication statusPublished - 2017 Nov 4

Keywords

  • Electron paramagnetic resonance
  • Exchange interaction
  • Lanthanide
  • Lanthanoid, rare earth metal
  • Single-molecule magnet

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

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