A single-molecular magnet:: [Mn12O12(O2CCH2Br)16(H2O)4]

被引：34

作者：

Tsai, HL ^{[1
]}

Chen, DM

Yang, CI

Jwo, TY

Wur, CS

Lee, GH

Wang, Y

机构：

[1] Natl Cheng Kung Univ, Dept Chem, Tainan 70101, Taiwan

[2] Natl Cheng Kung Univ, Dept Phys, Tainan 70101, Taiwan

[3] Natl Taiwan Univ, Instrumentat Ctr, Coll Sci, Taipei 10764, Taiwan

来源：

INORGANIC CHEMISTRY COMMUNICATIONS | 2001年 / 4卷 / 09期

关键词：

crystal structure; single-molecule magnet; step-like hysteresis loop; magnetic quantum tunneling;

D O I：

10.1016/S1387-7003(01)00265-9

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The synthesis, X-ray crystal structure and magnetic properties of a new dodecanuclear manganese complex [Mn12O12(O2CCH2Br)(16)(H2O)(4)] . 4CH(2)Cl(2)(2) . 4CH(2)Cl(2) are reported. Complex 2 . 4CH(2)Cl(2) crystallizes in tetragonal space group I4(1)/a with the following cell dimensions at 293(2) K: a = b = 26.697(4) Angstrom, c = 13.246(4) Angstrom, and Z = 4. The results of DC and AC magnetic susceptibility studies are described. DC measurements show the presence of hysteresis loops, and the out-of-phase component of AC magnetic susceptibilities has a frequency dependent maximum. Step-like features are seen on hysteresis loops and quantum mechanical tunneling could be the origin of these unusual relaxations. (C) 2001 Published by Elsevier Science B.V.

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页码：511 / 514

页数：4

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