Abstract
Four novel coordination polymers based on an unsymmetrical angular ligand, 4-(5-(pyridin-3-yl)-4H-1,2,4-triazol-3-yl) benzoic acid (H2L), namely, Co(HL)2(H2O)4 (1), {[Ni(HL)2(H2O)2]·2H2O}n (2), [Ni(HL)2(H2O)2]n (3), and [Zn2(HL)L(μ2-OH)]n (4) have been synthesized under hydrothermal conditions and characterized. Compounds 1–4 have totally different architectures. Compound 1 is 0D mononuclear molecule. Complex 2 displays a unique 1D chain structure. Complexes 3 and 4 show 2D network layers. These various architectures demonstrate the versatile coordination abilities of the pyridine-substituted triazolyl benzoate ligand. Variable-temperature magnetic susceptibility measurements in the range 2–300K revealed the existence of antiferromagnetic interactions among the adjacent Ni ions in 3. Besides, the luminescence properties of 4 and ligand were also discussed.
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