Abstract
A 3D framework [Zn3(OH)2(btca)2·2DMF]·H2O (1) constructed by [Zn3(OH)2] chains and btac2− linkers has been solvothermally synthesized by zinc nitrate salt and benzotriazole-5-carboxylic acid (H2btca) ligand. Powder X-ray diffraction (PXRD), infrared spectra (IR), thermogravimetric analyses (TGA), elemental analyses and x-ray crystallography validated the formula of as-synthesized 1·H2O. Thereinto, the [Zn3(OH)2] 1D chain embodies the structural characteristics of the adjacent 12-MC-4 metallacrowns, the metallacrown consists of four metals, two μ3-OH oxygen anions and eight nitrogen atoms from triazole ligands. 1·H2O exhibits high water stability and pH stability in aqueous solution which can be applied as a “turn–off” fluorescence probe to detect Fe3+ and Cr6+ ions in an aqueous solution with selectivity and sensitivity. The low cost and high yield of this work lay a foundation for the industrialization development of serum and other health testing in the future.
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