Abstract
Solvothermal reactions of the 2,5-di(1H-1,2,4-triazol-1-yl)terephthalic acid (H2L), ancillary bridging linkers oxalate, and transitional metal Co(II) cations afford two coordination polymers, namely, [Co(L0.5)2(H2O)]n (1), and [Co2L(ox)H2O]n (2), (L = 2,5-di(1H-1,2,4-triazol-1-yl)terephthalic acid, ox2− = oxalate). Their structures and properties have been determined by single-crystal X-ray diffraction analyses, IR spectra, elemental analyses, thermogravimetric analyses (TGA). Complex 1 exhibits an interesting 3D framework with double helical 2D sheets structure. The host network of complex 2 displays an unusual 3D networks by 1D chains, which are further connected by L2− ligands into dense packing structures. Topology analyses reveal that 1 and 2 can be simplified as a trinodal (4,5,6)-connected topological net with a point symbol of (42 · 62 · 82)(44 · 63 · 83)2(46 · 67 · 82) for 1, and (42 · 84)(46 · 66 · 83)(48 · 62)2 for 2. Besides, magnetic studies indicate both complexes 1 and 2 showing antiferromagnetic properties.
Published Version
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