Abstracts 2007

Abstract of Publication No. 576

Roland Bircher, Brendan F. Abrahams, Hans U. Güdel and Colette Boskovic
Synthesis, structure and magnetic properties of a novel Tb4 spin cluster and synthesis of a Tb chain
Polyhedron 26, 3023-3028 (2007)      Full Text (PDF)      DOI-Link      Crystal Structure Data (CIF format)     

Abstract: The syntheses of two new polynuclear TbIII compounds are reported. A tetranuclear complex [Tb4(H2L)2(H4L)2(OAc)8] (1), with H4L = 2-((2-hydroxy-benzylidene)-amino)-2-hydroxy-methyl-propane-1,3-diol, has a butterfly-type structure, while [Tb(OAc)3MeOH] (2) is a linear chain. A novel binding mode for H2L2 is observed in 1, with two alkoxides each bridging three TbIII ions. The magnetic properties of 1 are determined by the superposition of the ligand field split 7F6 states of TbIII single-ions located on two crystallographically distinct sites. Weak antiferromagnetic exchange interactions possibly contribute to the lowering of the magnetic moment at the lowest temperatures.

Graphical Abstract: The syntheses of a tetranuclear terbium complex incorporating the ligand 2-((2-hydroxy-benzylidene)-amino)-2-hydroxy-methyl-propane-1,3-diol and of a linear terbium chain are reported. The magnetic properties of the tetranuclear complex were investigated by variable temperature magnetic susceptibility and magnetization measurements.

Last modified: 13.12.11 by Gabriela Frei