氰基桥联的Mn(III)3M(III)（M(III)=Fe、Cr）配合物：合成、结构及磁性质

Cyano-bridged Mn(III)3M(III) (M(III) = Fe, Cr) complexes: synthesis, structure, and magnetic properties.

作者信息

Miyasaka Hitoshi, Takahashi Hitomi, Madanbashi Tomokura, Sugiura Ken-ichi, Clérac Rodolphe, Nojiri Hiroyuki

机构信息

Department of Chemistry, Tokyo Metropolitan University, 1-1 Minami-ohsawa, Hachioji, Tokyo 192-0397, Japan.

出版信息

Inorg Chem. 2005 Aug 22;44(17):5969-71. doi: 10.1021/ic0505753.

DOI:10.1021/ic0505753

PMID:16097811

Abstract

Two cyano-bridged tetranuclear complexes composed of Mn(III) salen (salen = N,N'-ethylene bis(salicylideneiminate)) and hexacyanometalate(III) (M = Fe, Cr) in a stoichiometry of 3:1 have been selectively synthesized using {NH2(n-C12H25)2}3[M(III)(CN)6] (M(III) = Fe, Cr) starting materials: [{Mn(salen)(EtOH)}3{M(CN)6}] (M = Fe, 1; Cr, 2). Compounds 1 and 2 are isostructural with a T-shaped structure, in which [M(CN)6]3- assumes a meridional-tridentate building block to bind three [Mn(salen)(EtOH)]+ units. The strong frequency dependence and observation of hysteresis on the field dependence of the magnetization indicate that 1 is a single-molecule magnet.

摘要

利用{NH2(n-C12H25)2}3[M(III)(CN)6]（M(III)=Fe、Cr）起始原料，以3:1的化学计量比选择性合成了两种由Mn(III)萨伦（萨伦=N,N'-亚乙基双（水杨醛亚胺））和六氰基金属酸盐(III)（M = Fe、Cr）组成的氰基桥连四核配合物：[{Mn(salen)(EtOH)}3{M(CN)6}]（M = Fe，1；Cr，2）。化合物1和2具有T形结构的同构体，其中[M(CN)6]3-呈现为经向三齿结构单元以结合三个[Mn(salen)(EtOH)]+单元。磁化强度对磁场依赖性的强烈频率依赖性和滞后现象的观察表明1是一种单分子磁体。