Synthesis, crystal structures and magnetic properties of two tetranuclear lanthanide-hydroxo cubane clusters
作者： Xi-Li Li , Feng-Cai Li , Xue-Li Zhang , Ying-Fan Liu , Ai-Ling Wang
DOI: 10.1016/J.SYNTHMET.2015.07.035
关键词: Crystal structure 、 Crystallography 、 Isostructural 、 Fourier transform infrared spectroscopy 、 Atmospheric temperature range 、 Cubane 、 Single crystal 、 Chemistry 、 Inorganic chemistry 、 Lanthanide 、 Cluster (physics)
摘要: Abstract Two tetranuclear Lanthanide-hydroxo cubane clusters of composition [Ln4(μ3-OH)4{(μ-O)-η2-acac}4(η2-acac)4]·C7H8 (Ln = Er 1 and Yb 2, acac = acetylacetonate) have been prepared characterized by elemental analyses, FTIR spectroscopy X-ray crystallography. Single crystal analyses 2 revealed that they are isostructural with the Ln4(μ3-OH)48+ cluster core showing cubane-like geometry. Each consists four lanthanide atoms, μ3-O eight acac ligands making up peripheral part cluster. types coordination modes [η2- (μ-O)-η2-] in observed. Investigations on magnetic properties indicate both complexes do not exhibit frequency-dependent in-phase (χ′) out-of-phase (χ′′) signals alternating current (ac) susceptibilities 2. In particular, unlike most documented β-diketonate mono- or multinuclear exhibiting near-infrared (NIR) emission property, show any detectable NIR at temperature range reason nonluminescence for is further elucidated this work.
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