Synthesis, crystal structures, magnetic and luminescent properties of nickel(II) and cadmium(II) coordination polymers bearing 5-(2′-carboxylphenyl) nicotate ligands
Dong-Yu LvZhu-Qing GaoJin‐Zhong GuRen RenWei Dou
Abstract
Two coordination polymers, namely [M(cpna)(phen)(H(2)O)] (n) (M = Ni, 1; Cd, 2, H(2)cpna = 5-(2'-carboxylphenyl) nicotic acid, phen = 1,10-phenanthroline), have been hydrothermally synthesized and characterized by single-crystal X-ray diffraction, magnetic and luminescence measurements. Single-crystal X-ray diffraction studies show that the two complexes are isostructural polymers. They have 1D step-like chain structures, which are further extended into 3D metal-organic supramolecular frameworks by pi-pi stacking interactions. Magnetic studies for complex 1 show antiferromagnetic coupling between the adjacent Ni(II) centers, with g = 2.10 and J = -4.30 cm(-1). Complex 2 displays strong green fluorescent emission at room temperature.
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