We describe here the synthesis, the magnetic properties, and a comparison of the X-band EPR spectra of complexes belonging to the homologous families Ln(III)(HBPz(3))(2)(3,5-DTBSQ) and Ln(III)(HBPz(3))(2) (tropolonate) (where HBPz(3) = hydrotrispyrazolborare, 3,5-DTUSQ = 3,4-di-tert-butylsemiquinone and Ln = Yb and Ho). This study shows new examples of violations to the rule that ferromagnetic coupling should hold for ions of the second half of the lanthanide series and an unpaired spin.
Crystal field and exchange effects in rare earth semiquinone complexes / A. Dei; D. Gatteschi; J. Pecaut; S. Poussereau; L. Sorace; K. Vostrikova. - In: COMPTES RENDUS DE L'ACADÉMIE DES SCIENCES. SÉRIE IIC, CHIMIE. - ISSN 1387-1609. - STAMPA. - 4:(2001), pp. 135-141. [10.1016/S1387-1609(00)01196-8]
Crystal field and exchange effects in rare earth semiquinone complexes
DEI, ANDREA;GATTESCHI, DANTE;SORACE, LORENZO;
2001
Abstract
We describe here the synthesis, the magnetic properties, and a comparison of the X-band EPR spectra of complexes belonging to the homologous families Ln(III)(HBPz(3))(2)(3,5-DTBSQ) and Ln(III)(HBPz(3))(2) (tropolonate) (where HBPz(3) = hydrotrispyrazolborare, 3,5-DTUSQ = 3,4-di-tert-butylsemiquinone and Ln = Yb and Ho). This study shows new examples of violations to the rule that ferromagnetic coupling should hold for ions of the second half of the lanthanide series and an unpaired spin.
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