Syntheses, structures, and photoluminescence of d10 coordination architectures: From 1D to 3D complexes based on mixed ligands

Six new compounds, namely, {[Cd3(Himpy)3(tda)2]·3H2O}n (1), {[Zn3(bipy)2(tda)2(H2O)2]·4H2O}n (2), {[Cd3(bipy)3(tda)2]·4H2O}n (3), {[Cd3(tda)2(H2O)3Cl]·H2O}n (4), {[Zn2(tz)(tda)(H2O)2]·H2O}n (5) and {[Cd7(pz)(tda)4(OAc)(H2O)7]·3H2O}n (6) [H3tda = 1H-1,2,3-triazole-4,5-dicarboxylic acid, Himpy = 2-(1H-imidazol-2-yl)pyridine, bipy = 2,2′-bipyridine, Htz = 1H-1,2,4-triazole, H2pz = piperazine] have been prepared under hydrothermal condition and characterized by elemental analyses, infrared spectroscopy, powder X-ray diffraction and single-crystal X-ray diffraction analyses. Compound 1 is a 1D column-like structure and displays a 3D supramolecular network via the π···π stacking interaction. The compounds 2 and 3 exhibit similar 2D layer-like structure, which further extend to 3D supermolecular structure by the π···π stacking interaction. All of compounds 4–6 display 3D framework with diverse topology constructed from the tda3− ligands in different coordination modes and secondary ligands (or bridging atom) connecting metal ions. Furthermore, the thermal stabilities and photoluminescent properties of compounds 1–6 were studied.

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