Synthesis, structure and luminescent sensor of zinc coordination polymers based on a new functionalized bipyridyl carboxylate ligand

Abstract

Three new zinc coordination polymers, [Zn(L)]n·2n(H2O) (1), [Zn2(L)(μ2-OH)2]n·1.5n(H2O) (2), [Zn3(L)2(glu)]n (3), [H2L=4′-(4-carboxyphenyl)-6′-carboxycalte-2,2′-bipyridine, H2glu=glutaric acid] have been hydrothermally synthesized and characterized by elemental analysis, infrared spectra and single crystal X-ray diffraction. Compound 1 is a 2D structure with the hcb topological net. Compound 2 is a microporous 2D layer structure with [Zn4O4] eight-membered rings. Compound 3 exhibits a self-penetrating 3D framework structure, which shows a new interesting topological net with the point symbol of {123}. Luminescent studies indicated that compound 3 could be an efficient multifunctional luminescent material for high-sensitivity sensing metal cations and small organic molecules, especially for Fe3+ and Cu2+, methanol and nitrobenzene.