title: Structural switching from paramagnetic to single-molecule magnet behaviour of LnZn2 trinuclear complexes.
abstract: Five LnZn2 trinuclear complexes, [Ln(NO3){Zn(L)(SCN)}2] (H2L is a Schiff base ligand derived from o-vanillin and ethylenediamine; Ln = Tb 1, Dy 2, La 3, Tb0.14La0.864, and Dy0.21La0.795), were synthesised in which the Zn(II)-Ln(III)-Zn(II) array exhibits two slightly different arrangements: 1 and 2 exhibited slightly bent arrangements, whereas 3-5 exhibited more linear arrangements. These differences in the arrangements lead to a slightly different coordination geometry around Ln(III). From the detailed studies of dynamic susceptibility, 1 and 2 were found to be paramagnetic, whereas 4 and 5 were SMMs with barriers for the flipping of magnetisation with a height of 41.2(4) K and 156(4) K, respectively.
authors.affiliation: Faculty of Science, Nara Women's University, Nara, Nara 630-8506, Japan. kajiwara@cc.nara-wu.ac.jp.
authors.forename: Poh Ling
authors.initials: PL
authors.lastname: Then
authors.forename: Chika
authors.initials: C
authors.lastname: Takehara
authors.forename: Yumiko
authors.initials: Y
authors.lastname: Kataoka
authors.forename: Motohiro
authors.initials: M
authors.lastname: Nakano
authors.forename: Tomoo
authors.initials: T
authors.lastname: Yamamura
authors.forename: Takashi
authors.initials: T
authors.lastname: Kajiwara