Tetra-aqua-bis(3,5-di-4-pyridyl-1H-1,2,4-triazolido)cadmium(II) dihydrate

A novel three-dimensional cadmium sulfate-based inorganic-organic hybrid polymer with green photoluminescence

Layer diffusion of 3,5-bis(4-pyridyl)-1H-1,2,4-triazole (BptH) in ethanol on an aqueous solution of cadmium sulfate leads to a novel three-dimensional cadmium sulfate-based inorganic-organic hybrid polymer (IOHP), CdSO4(H2O)(BptH)·1.5H2O (1). Its structure was determined by single-crystal X-ray diffraction (SCXRD), and further characterized by elemental analysis, powder X-ray diffraction (PXRD), infrared spectra (IR), and thermogravimetric (TG) analysis. IOHP 1 exhibits a novel 2-nodal 3,5-connected nanoporous structure formed by BptH ligands connecting 2D neutral inorganic cadmium sulfate layers. Water molecules reside in its nanoporous channels. The thermal stability and solid-state photoluminescence properties of the compound have also been investigated.

Diaquabis(3-nitrobenzoato-κO1)bis[1H-5-(3-pyridyl)-3-(4-pyridyl)-1H-1,2,4-triazole-κN5]cobalt(II) dihydrate

In the centrosymmetric title compound, [Co(C₇H₄NO₄)₂(C₁₂H₉N₅)₂(H₂O)₂]·2H₂O, the Co^II atom, located on an inversion center, is coordinated by two N atoms [Co—N = 2.155 (3) Å] and four O atoms [Co—O = 2.099 (2)–2.117 (3) Å] in a distorted octa­hedral geometry. Inter­molecular N—H⋯O, O—H⋯N and O—H⋯O hydrogen bonds link the components into a three-dimensional supramolecular framework.

Tetra-aqua-bis[3-(3-pyrid-yl)-5-(4-pyrid-yl)-1,2,4-triazolido]nickel(II) dihydrate

In the title compound, [Ni(C₁₂H₈N₅)₂(H₂O)₄]·2H₂O, the Ni^II atom is coordinated by the two N atoms [Ni—N = 2.094 (3) Å] and four O atoms [Ni—O = 2.063 (3)–2.083 (2) Å] in a distorted octa­hedral geometry. The mol­ecule is centrosymmetric and the Ni^II atom is located on an inversion center. Inter­molecular O—H⋯N and O—H⋯O hydrogen bonds link the complex into a three-dimensional supra­molecular framework.