Coordination enhancement of single-molecule magnet behavior of Tb(III)-Cu(II) dinuclear systems

被引：51

作者：

Kajiwara, Takashi ^{[1
,2
]}

Takahashi, Kohei ^{[3
]}

Hiraizumi, Tomonari ^{[3
]}

Takaishi, Shinya ^{[1
,2
]}

Yamashita, Masahiro ^{[1
,2
]}

机构：

[1] Tohoku Univ, Dept Chem, Grad Sch Sci, Aoba Ku, Sendai, Miyagi 9808578, Japan

[2] JST, Aoba Ku, Sendai, Miyagi 9808578, Japan

[3] Tohoku Univ, Dept Chem, Fac Sci, Aoba Ku, Sendai, Miyagi 9808578, Japan

来源：

POLYHEDRON | 2009年 / 28卷 / 9-10期

关键词：

Single-molecule magnet; Terbium; Copper; Schiff base ligand; MU-SR; MAGNETIZATION; COMPLEXES; CRYSTAL; STATES; FIELD;

D O I：

10.1016/j.poly.2009.02.010

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Tb(III)-Cu(II) based single-molecule magnets (SMMs) were synthesized to investigate the relationship between magnetic anisotropy and the symmetry of the ligand field, by the reaction of [TbCu(o-vanilate)(2)(NO(3))(3)] with 2,2-dimethyl-1,3-propanediamine (3), followed by the reaction of one another equivalent of o-vaniline (4). Both complexes behave as SMM in the temperature range of 2.8-4.0 K (3) and 2.8-5.2 K (4), showing semi-circle shapes of Cole-Cole plots with alpha parameters in the ranges of 0.27-0.41 and 0.11-0.32. The energy barriers Delta/k(B) for the spin flippings were estimated from the Arrhenius plots to be 29(2) K for 3 and 32.2(6) K for 4, respectively. (C) 2009 Elsevier Ltd. All rights reserved.

引用

页码：1860 / 1863

页数：4

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