Synthesis, characterization and magnetic properties of [Mn30O24(OH)8(O2CCH2C(CH3)3)32(H2O)2(CH3NO2)4]:: the largest manganese carboxylate cluster

被引：78

作者：

Soler, M

Rumberger, E

Folting, K

Hendrickson, DN ^{[1
]}

Christou, G

机构：

[1] Univ Calif San Diego, Dept Chem, La Jolla, CA 92093 USA

[2] Indiana Univ, Dept Chem, Bloomington, IN 47405 USA

来源：

POLYHEDRON | 2001年 / 20卷 / 11-14期

关键词：

manganese; crystal structure; high nuclearity cluster; single-molecule magnets;

D O I：

10.1016/S0277-5387(01)00620-9

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

We report the synthesis, structure and magnetic properties of a new member of the family of high nuclearity Mn clusters. The complex [Mn30O24(OH)(8)(O2CCH2C(CH3)(3))(32)(H2O)(2)(CH3NO2)(4)] (1), is the highest nuclearity manganese duster to date. Complex 1 was obtained from the comproportionation reaction between Mn(OAc)(2). 4H(2)O and KMnO4, followed by ligand substitution with Me3CCH2CO2H. It is mixed-valent with a trapped-valence 3Mn(II), 26Mn(III), Mn-IV oxidation state description. Dc magnetic susceptibility studies indicate an S = 7 ground state, and ac susceptibility studies show an out-of-phase susceptibility signal below 3 K, indicating complex 1 to display the slow magnetization relaxation diagnostic of a single-molecule magnet. (C) 2001 Elsevier Science Ltd. All rights reserved.

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页码：1365 / 1369

页数：5

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