Synthesis, Crystal Structure and Catalytic Behavior of Homo- and Heteronuclear Coordination Polymers [M(tdc)(bpy)] (M²⁺ = Fe²⁺, Co²⁺, Zn²⁺, Cd²⁺; tdc^2– = 2,5-thiophenedicarboxylate)

Abstract

A series of isostructural 3D coordination polymers ³_∞[M­(tdc)­(bpy)] (M²⁺ = Zn²⁺, Cd²⁺, Co²⁺, Fe²⁺; tdc^2– = 2,5-thiophenedicarboxylate; bpy = 4,4′-bipyridine) was synthesized and characterized by X-ray diffraction, thermal analysis, and gas adsorption measurements. The materials show high thermal stability up to approximately 400 °C and a solvent induced phase transition. Single crystal X-ray structure determination was successfully performed for all compounds after the phase transition. In the zinc-based coordination polymer, various amounts of a second type of metal ions such as Co²⁺ or Fe²⁺ could be incorporated. Furthermore, the catalytic behavior of the homo- and heteronuclear 3D coordination polymers in an oxidation model reaction was investigated