Anion-driven structures and SMM behavior of dinuclear terbium and ytterbium complexes

Abstract

The work in this present investigation reports the syntheses, crystal structures and magnetic properties of five dinuclear lanthanide complexes having compositions [Tb₂(HL)₄(NO₃)₆] (1), [Tb₂(HL)₄Cl₆]·2EtOH (2), [Yb₂(HL)₄(NO₃)₆] (3), [Yb₂(HL)₄Cl₆]·2EtOH (4) and [Y₂(HL)₄(NO₃)₆] (5) with HL = 8-hydroxyquinaldine. It is evident from the crystal structures that the coordination number of trivalent lanthanide ions in compounds 1, 3 and 5 is nine, whereas that for compounds 2 and 4 is six. A dynamic magnetic study shows that both compounds 1 and 3 exhibit single-molecule-magnet (SMM) behavior while compounds 2 and 4 do not have any SMM property.