Abstract
Using a carboxylic oligopyridine ligand, 4′-(4-carboxyphenyl)−4,2′:6′,4″- terpyridine (Hcptpy), and imidazole-4,5-dicarboxylic acid (H3idc), two metal(II)-cptpy compounds formulated as [Zn2(cptpy)4]n·nH2O (1), [Zn2(cptpy)2(Hidc)(H2O)2]n·nH2O (2) have been hydrothermally synthesized and structurally characterized by single-crystal X-ray diffraction. Compound 1 shows a 2D +2D →3D supramolecular framework structure generated by two-fold interpenetrating 3-connected 2D framework (2D+2D→2D) with the sql topological net and the Schläfli symbol of {44·62}. Compound 2 displays a 1D ladder chain structure. The luminescent properties of 1 and the ones immersed in various kinds of organic compounds and nitrate@DMF solutions have been investigated. Importantly, 1 shows highly selective and sensitive response to acetone and Cu2+ through luminescence quenching effects, making it a promising luminescent sensor for acetone molecule and Cu2+. Meaningwhile, compound 2 shows highly selective sensitivity for Cr2O72−.
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