Synthesis, characterization of CdII-based complexes for efficient detection of copper(II) ions and antibiotics.

In this work, two compounds, namely [Cd₂(HL)(4,4′-bpy)(H₂O)]_n (1), [Cd₂(HL)(bpa)(H₂O)·2H₂O]_n (2) (2,3-bis(3,5-dicarboxylphenxoy)benzoic acid (H₅L), 4,4′-bipyridine (4,4^'-bpy) and 1,2-bi(4-pyridyl)ethane (bpa)), have been synthesized. Complex 1 showed three-dimensional metal–organic framework, which was assembled by carboxylic groups and one type of 4,4′-bpy ligand to layer structure, and further extended by the other type of 4,4′-bpy ligands, while complex 2 displayed 3D metal–organic framework with bpa hanging inside the hole. Fluorescence detection experiment showed that compound 1 can detect nitrofurazone, sulfachlopyridazine and sulfathiazole. In addition, compounds 1 and 2 can be served as luminescent probes for sensing Cu²⁺ ion. [ABSTRACT FROM AUTHOR]