Synthesis, crystal structures, and luminescence properties of coordination polymers and a discrete complex of cadmium(ii) halides with 1-(1,2,4-triazol-1-yl)adamantane
2021
The reactions of 1-(1,2,4-triazol-1-yl)adamantane with cadmium(ii) chloride, bromide, and iodide were studied. The crystal structures of the synthesized coordination compounds were determined by single-crystal X-ray diffraction. Cadmium(ii) chloride and bromide form 1D coordination polymers, in which cadmium ions are bridged by two halide ions, whereas cadmium(ii) iodide forms a discrete complex with a tetrahedral environment of the cadmium ion. in all compounds, the organic ligand is coordinated in a monodentate fashion through nitrogen atoms at the 4 positions of the 1,2,4-triazole rings. The quantum yield of ligand-centered luminescence of the halide complexes increases in the series of halogens from chlorine to iodine and reaches 35% for the iodide complex.
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