title: Unique Y-shaped lanthanide aggregates and single-molecule magnet behaviour for the Dy4 analogue.
abstract: The assembly of N'-(amino-(pyrimidin-2-yl)methylene)-o-vanilloyl hydrazine ligands (H2L, Scheme 1) with different lanthanide perchlorates produces novel Y-shaped tetranuclear complexes, [Ln4(μ3-OH)(L(2-))4(H2O)6]·(ClO4)3·6H2O, where Ln = Tb (1), Dy (2) and Ho (3). The formation of this unprecedented Y-shaped topology is largely ascribed to the versatility of the mixed-donor hydrazone ligands in terms of their potential denticity. Analysis of the susceptibility data shows that only the Dy-based molecule features SMM-like behaviour. The synthetic methodology of employing H2L and related ligands has provided a very promising route towards new families of magnetic coordination clusters with novel metal topologies and properties.
authors.affiliation: State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China. tang@ciac.ac.cn.
authors.forename: Shufang
authors.initials: S
authors.lastname: Xue
authors.forename: Yun-Nan
authors.initials: YN
authors.lastname: Guo
authors.forename: Lang
authors.initials: L
authors.lastname: Zhao
authors.forename: Peng
authors.initials: P
authors.lastname: Zhang
authors.forename: Jinkui
authors.initials: J
authors.lastname: Tang