Article

Coordination-tuned single-molecule-magnet behavior of TbIII-CuII dinuclear systems.

Department of Chemistry, Graduate School of Science, Tohoku University, and CREST, Japan Science and Technology Agency (JST), Aramaki, Aoba-ku, Sendai 980-8578, Japan.
Inorganic Chemistry (impact factor: 4.6). 09/2008; 47(19):8604-6. DOI:10.1021/ic8013656 pp.8604-6
Source: PubMed

ABSTRACT Tb (III)-Cu (II)-based single-molecule magnet (SMM) and non-SMM were synthesized to investigate the relationship between magnetic anisotropy and the symmetry of the ligand field by the reaction of [TbCu( o-vanilate) 2(NO 3) 3] with methoxypropylamine (MeOC 3H 6NH 2, 1) or ethoxyethylamine (EtOC 2H 4NH 2, 2). In both complexes, Tb (III) ions have a bicapped square-antiprism coordination geometry. When the Tb (III) ion is in a less symmetrical ligand field, it has an easy-axis anisotropy and shows SMM behavior, whereas when it is in a more symmetrical environment, it has an easy-plane anisotropy and exhibits non-SMM behavior.

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Keywords

[TbCu( o-vanilate)
 
bicapped square-antiprism coordination geometry
 
easy-axis anisotropy
 
easy-plane anisotropy
 
exhibits non-SMM behavior
 
ligand field
 
magnetic anisotropy
 
methoxypropylamine
 
symmetrical environment
 
symmetrical ligand field
 
symmetry