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  • Title: Metal-directed supramolecular architectures based on the bifunctional ligand 2,5-bis(1H-1,2,4-triazol-1-yl)terephthalic acid.
    Author: Cai H, Li N, Zhang N, Yang Z, Cao J, Lin Y, Min N, Wang J.
    Journal: Acta Crystallogr C Struct Chem; 2020 Feb 01; 76(Pt 2):118-124. PubMed ID: 32022705.
    Abstract:
    By the solvothermal reactions of 2,5-bis(1H-1,2,4-triazol-1-yl)terephthalic acid (H2L) with transition-metal ions, two novel polymeric complexes, namely, poly[diaqua[μ4-2,5-bis(1H-1,2,4-triazol-1-yl)terephthalato]cobalt(II)], [Co(C12H6N6O4)(H2O)2]n, (1), and poly[[diaqua[μ4-2,5-bis(1H-1,2,4-triazol-1-yl)terephthalato]nickel(II)] dihydrate], {[Ni(C12H6N6O4)(H2O)2]·2H2O}n, (2), were isolated. Both polymers have been characterized by FT-IR spectroscopy, elemental analysis and single-crystal X-ray diffraction analysis. The complexes have similar two-dimensional layered structures and coordination modes. Furthermore, the two-dimensional layered structures bear distinct intermolecular hydrogen-bonding interactions and π-π stacking interactions to form two different three-dimensional supramolecular networks based on 44-subnets. The structural variation depends on the nature of the metal cations. The results of variable-temperature magnetization measurements (χMT-T and χM-1-T) show that complexes (1) and (2) display antiferromagnetic behaviour.
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