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Hydrothermal reaction of Zn(NO 3 ) 2  ·  6 H 2 O and 2-hydroxypyridine-3-carboxylic acid afforded a novel supramolecular complex, [Zn(C 6 H 4 NO 3 ) 2 (H 2 O) 2 ] (1). The complex has been characterized by macroanalysis, IR spectra, and thermogravimetric and differential thermal analysis (TG/DTA). Single crystal X-ray analysis shows that complex 1 crystallizes in the monoclinic space group P2 1 /c with the cell dimensions a = 7.534(6), b = 12.289(1), c = 7.534(6) Å, β = 100.51°, V = 685.85(1) Å 3 , and Z = 2. The six-coordinated Zn atom is in a severely distorted octahedral geometry. The complex molecules are assembled via strong O-H· · ·O and N-H· · ·O hydrogen bonding interactions into a three-dimensional supramolecular framework. Compared with the free ligand, complex 1 exhibits strong fluorescence in the solid state at room temperature.

Structure and Fluorescence Properties of a Novel Supramolecular Zinc Complex