Zeng-Chuan Hao

Supramolecular Aggregation of Tetrameric and Homododecameric Water Clusters in a 1D Cobalt(II) Coordination Polymer Containing 1,2,4,5-Benzenetetracarboxylate

A ternary mixed ligand Co(II) coordination polymer, namely, {[Co(L)(btec)0.5(H2O)]·3H2O}n, (L = 1,4-bis(thiabendazole)butane, H4btec = 1,2,4,5-benzenetetracarboxylic acid) has been hydrothermally synthesized and characterized by elemental analysis, IR spectroscopy and single-crystal X-ray diffraction analysis. The coordination polymer features a 1D wave-like chain, which is further extended into a 3D supramolecular framework via O–H⋯O hydrogen bonding interactions. It is noteworthy, the chair-shaped homododecamers and quasirectangle teteramers assemble with the 1D loose-string-like water-btec4− chain into a unusual boxing-glove-like 2D water layer. Hirshfeld surface analysis and fingerprint plots show that the coordination polymer is stabilized by O–H⋯O, π⋯π, O–H⋯π, and H⋯H intermolecular interactions. Furthermore, thermal behaviors, luminescence and catalytic properties of the coordination polymer for degradation of methyl orange in a Fenton-like process have been investigated.

Two 3D Supramolecular Coordination Polymers Constructed from Aromatic Carboxylic Acids and Flexible Bis(thiabendazole) Ligands

Two coordination polymers (CPs), [Zn(L1)(H2bta)] (1) and [Co(L2)(ndc)]·0.75H2O (2), (L1 = 1,6-(thiabendazole)hexane), L2 = 1,3-(thiabendazole)propane, H4bta = 1,2,4,5-benzenetetracarboxylic acid, H2ndc = 2,6-naphthalenedicarboxylic acid) have been hydrothermally synthesized and characterized. Single crystal X-ray diffraction analyses reveal that CP 1 and CP 2 feature 1D infinite zigzag and “Ω”-like chains, and further extend into 3D supramolecular framework by O–H⋯O and C–H⋯O hydrogen bonding interactions, respectively. Furthermore, the luminescence properties, thermal stability, and catalytic degradation of methyl orange in a Fenton-like process are also investigated in detail.

Structure and Fluorescence Properties of a Two-Dimensional Zinc(II) Coordination Polymer Containing Isophthalate

A new coordination polymer formulated as [Zn(L)(1,3-BDC)] (L = 1,3-bis-(benzimidazole-1-ylmethylene)-benzene, 1,3-H2BDC = isophthalic acid) is hydrothermally synthesized and characterized by elemental analysis, IR, and single crystal X-ray diffraction analysis. It crystallizes in the monoclinic space group P21/n, a = 10.179(3) Å, b = 10.510(3) Å, c = 23.217(6) Å, α = 90, β = 91.983(3), γ = 90°, V = 2482.4(11) Å3, Z = 4, C30H22N4O4Zn, Mr = 567.91, Dc = 1.520 g/cm3, μ = 1.036 mm–1. The complex exhibits a 2D (4,4) network with the point symbol {44,62} and further extended into a 3D supramolecular framework through π⋯π stacking interactions between two well-overlapping benzimidazolyl rings of the neighboring L ligands. Furthermore, the thermal stability and fluorescence properties of the complex are investigated.

Four Flexible Bis(Thiabendazole)-Based Cd(II) Coordination Polymers with Various Aromatic Carboxylates: Syntheses, Structures and Properties

Four Cd(II) coordination polymers (CPs) including [Cd(btbb)0.5(L1)]n (1), [Cd(btbb)(L2)·(H2O)1.5]n (2), [Cd(btbb)(L3)]n (3), and [Cd(btbb)(HL4)]n (4) (btbb = 1,4-bis(thiabendazole)butane, H2L1 = 5-hydroxyisophthalic acid, H2L2 = 4,4′-biphenyldicarboxylic acid, H2L3 = tetrabromoterephthalic acid, H3L4 = 5-nitro-1,2,3-benzenetricarboxylic acid) were prepared under hydrothermal conditions based on flexible bis(thiabendazole) ligand and different co-carboxylates. Their structures have been determined by single-crystal X-ray diffraction analyses, elemental analyses, IR spectra, X-ray powder diffraction, and thermogravimetric analyses. CP 1 exhibits a 3D 2-nodal (3,4)-connected framework with the 3,4T10 topology. CP 2 and 3 feature typical hcb layer structure, and 3 is further combined into a 3D supramolecular architecture through C–H⋯O hydrogen bonds. CP 4 possesses an infinite chain and further extended into 2D supramolecular network by O–H⋯O hydrogen-bonding interactions. The effects of the aromatic polycarboxylate co-ligands on the CPs framework have been discussed and the catalytic activities of CPs 1–4 for degradation of methyl orange in Fenton-like process are also investigated.