Structural switching from paramagnetic to single-molecule magnet behaviour of LnZn2 trinuclear complexes

Poh Ling Then; Chika Takehara; Yumiko Kataoka; Motohiro Nakano; Tomoo Yamamura; Takashi Kajiwara

doi:10.1039/c5dt02965a

Structural switching from paramagnetic to single-molecule magnet behaviour of LnZn₂ trinuclear complexes

Poh Ling Then, Chika Takehara, Yumiko Kataoka, Motohiro Nakano, Tomoo Yamamura, Takashi Kajiwara

International Research Center for Nuclear Materials Science

Research output: Contribution to journal › Article › peer-review

23 Citations (Scopus)

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, Tb_0.14La_0.864, and Dy_0.21La_0.795), 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.

Original language	English
Pages (from-to)	18038-18048
Number of pages	11
Journal	Dalton Transactions
Volume	44
Issue number	41
DOIs	https://doi.org/10.1039/c5dt02965a
Publication status	Published - 2015

ASJC Scopus subject areas

Inorganic Chemistry

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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 ZnII-LnIII-ZnII 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 LnIII. 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.",

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T1 - Structural switching from paramagnetic to single-molecule magnet behaviour of LnZn2 trinuclear complexes

AU - Then, Poh Ling

AU - Takehara, Chika

AU - Kataoka, Yumiko

AU - Nakano, Motohiro

AU - Yamamura, Tomoo

AU - Kajiwara, Takashi

PY - 2015

Y1 - 2015

N2 - 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 ZnII-LnIII-ZnII 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 LnIII. 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.

AB - 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 ZnII-LnIII-ZnII 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 LnIII. 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.

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Structural switching from paramagnetic to single-molecule magnet behaviour of LnZn₂ trinuclear complexes

Abstract

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