Dysprosium complexes with mono-/di-carboxylate ligands-From simple dimers to 2D and 3D frameworks

Four dysprosium (Dy) single carboxylates, a formate, a propionate, a butyrate and an oxalate have been synthesized and structurally characterized. The structure of Dy(HCO2)(3) (1) contains nine-fold coordinated Dy polyhedra in perfect tricapped trigonal prisms. They are linked through trigonal 0 atoms forming 1D pillars which are further linked together through tricapped 0 atoms into a 3D pillared metal organic framework. The network structure is stable up to 360 degrees C. The structure of [Dy-2(C2O4)(3)(H2O)(6)]center dot 2.5H(2)O (2) contains nine-fold coordinated Dy polyhedra linking together through mu(2)-bridging oxalate anions into a 2D hexagonal layered structure. Both [Dy-2(Pr)(6)(H2O)(4)]center dot(HPr)(0.5) (3) [Pr = (C2H5CO2)(-1)] and [Dy-2(Bu)(6)(H2O)(4)] (4) [Bu = (C3H7CO2)(-1)] have similar di-nuclear structures. The Raman vibration modes of the complexes have been investigated. Crown Copyright (C) 2014 Published by Elsevier Inc. All rights reserved.