3D Coordination Framework [Ln₄(μ₃-OH)₂Cu₆I₅(IN)₈(OAc)₃] (IN = Isonicotinate):  Employing 2D Layers of Lanthanide Wheel Clusters and 1D Chains of Copper Halide Clusters

Abstract

Two novel 3D heterometallic coordination polymers, Ln4(μ3-OH)2Cu6I5(IN)8(OAc)3 (Ln = Nd (1), Pr (2); HIN = isonicotinic acid, HOAc = acetic acid), have been synthesized under hydrothermal conditions and characterized by elemental, infrared, and thermogravimetric analyses and single-crystal X-ray diffraction. Both compounds are isostructural and crystallize in the monoclinic system, space group P21/c. Both polymers are constructed from 2D lanthanide-cluster polymers based on the {Ln16} wheel-cluster and 1D copper-cluster polymers based on the {Cu6I5} cluster, which represent the first examples of 3D coordination frameworks created by using a combination of two different types of metal-cluster polymer units, namely, a high-nuclearity lanthanide-cluster polymer and a transition-metal-cluster polymer