Dy-2 and Dy-4 hydroxo clusters assembled using o-vanillin based Schiff bases as ligands and beta-diketone co-ligands: Dy-4 cluster exhibits slow magnetic relaxation

摘要

The reaction of DyCl3 center dot 6H(2)O with the mixed ligand system consisting of o-vanillin based Schiff base ligand H2L [2-(2-hydroxy-3-methoxybenzylideneamino) phenol], dibenzoylmethane (Ph(2)acac) and acetylacetone (Acac) in the presence of triethylamine as the base afforded, di and tetranuclear dysprosium hydroxo clusters having formulae [Dy-2(L)(2)(Ph(2)acac)(2)(H2O)(2)](3) (1) and [Dy-4(L)(4)(acac)(2)(OH)(2)(H2O)(2)(C6H5N)(4)] (2) respectively. The solid state structures of these products were established by Single Crystal X-ray diffraction technique. Magnetism studies reveal Dy4 exhibits slow magnetic relaxation behavior. (C) 2018 Published by Elsevier Ltd.