A cyano-bridged single-molecule magnet:: Slow magnetic relaxation in a trigonal prismatic MnMO6(CN)18 cluster

被引：363

作者：

Sokol, JJ ^{[1
]}

Hee, AG ^{[1
]}

Long, JR ^{[1
]}

机构：

[1] Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2002年 / 124卷 / 26期

关键词：

D O I：

10.1021/ja0263846

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We report the synthesis of the first well-documented example of a cyano-bridged single-molecule magnet. An assembly reaction parallel to that employed in producing the trigonal prismatic [(Me3tacn)6MnCr6(CN)18]2+ (Me3tacn = N,N-,N-trimethyl-1,4,7-triazacyclononane) cluster affords K[(Me3tacn)6MnMo6(CN)18](ClO4)3 (1), containing an analogous molybdenum(III)-substituted cluster. Fits to the DC magnetic susceptibility and magnetization data for 1 show that the MnMo6 cluster possesses weak antiferromagnetic coupling (J = -6.7 cm-1), leading to an S = 13/2 ground state with significantly enhanced magnetic anisotropy (D = -0.33 cm-1 and E = -0.018 cm-1). Consistent with these results, AC magnetic susceptibility measurements show the molecule to exhibit slow magnetic relaxation indicative of a single-molecule magnet with an energy barrier of 10 cm-1 for spin reversal. Copyright © 2002 American Chemical Society.

引用

页码：7656 / 7657

页数：2

共 28 条

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