Ferrocene-Substituted [Mn4] Dicubane Single-Molecule Magnets

被引：6
|
作者：
Heroux, Katie J. [1 ]
Rheingold, Arnold L. [1 ]
Hendrickson, David N. [1 ]
机构：
[1] Univ Calif San Diego, Dept Chem & Biochem, La Jolla, CA 92093 USA
来源：
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY | 2009年 / 24期
基金：
美国国家科学基金会;
关键词：
Ferrocene; Magnetic properties; Magnetoanisotropy; Manganese; Oxidation; Single-molecule magnet; MAGNETIZATION; COMPLEXES;
D O I：
10.1002/ejic.200900515
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
Two new mixed-valent [Mn-4] single-molecule magnets (SMMs) have been synthesized by using N-alkylated diethanolamine ligands and ferrocenecarboxylic acid. Both complexes exhibit weak ferromagnetic exchange and appreciable axial zero-field splitting as evidenced by DC magnetic susceptibility and field-dependent magnetization measurements. A significant frequency-dependent out-of-phase signal in the AC susceptibility is also observed for both complexes, a feature that is characteristic of SMMs. The ground-state spin of each complex was determined from the DC data and extrapolation of the low-frequency AC data, giving a value of S = 8. This result is consistent with the previously reported and structurally similar S = 8 and S = 9 [Mn-4] dicubane SMMs. ((C) Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2009)
引用
收藏
页码：3541 / 3544
页数：4
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