Abstract
Five new coordination polymers, namely, [Cd(L)0.5(HBTC)]·0.2H2O (1), [Cd3(L)2(BTA)2(H2O)2]·H2O (2), [Cd2(L)0.5(BTEC)]·H2O (3), [Zn3(L)(BTC)2(H2O)2]·3H2O (4), and [Zn2(μ2-OH)(L)0.5(BTA)]·H2O (5) were synthesized under hydrothermal conditions by reactions of corresponding Cd(II) or Zn(II) salts with the mixed multidentate ligands of 1,2,4,5-tetrakis(imidazol-1-ylmethyl)benzene (L) and 1,3,5-benzenetricarboxylic acid (H3BTC), 1,3,5-benzenetriacetic acid (H3BTA), 1,2,4,5-benzenetetracarboxylic acid (H4BTEC), respectively. The complexes were characterized by single crystal X-ray diffraction, IR, and thermogravimetric and elemental analyses. The Cd(II) complex 1 is a two-dimensional (2D) network with infinite one-dimensional (1D) Cd-HBTC2− chains linked together by L ligands, while the Zn(II) complex 4 with the same mixed ligands has a three-dimensional (3D) structure. The Cd(II) complex with BTA3− and L ligands (2) features an unusual 3D framework, and the Zn(II) complex 5 shows a 3D structure with (63)2(42,84...
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