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To investigate the influence of spatial extended direction on the resulting structure, three new compounds have been synthesized by the reactions of Zn II or Cd II salts and 3,5-bis(pyridin-4-ylmethoxy)benzoic acid (HL 1 ) or 3,4-bis(pyridin-4-ylmethoxy)benzoic acid (HL 2 ) with two rationally selected multicarboxylate ligands. Without a secondary ligand, an 1D ribbon structure [Zn(L 1 ) 2 ]·H 2 O ( 1 ) furnished, the hydrogen bonds extended the structure to a 2D layer. Employing 4,4′-biphenyldicarboxylic acid (H 2 bpdc), a 2D layer structure [Zn(L 1 )(bpdc) 0.5 ] ( 2 ) resulted. The use of 1,3,5-benzenetricarboxylic acid (H 3 btc) led to a 3D compound [Cd 2 (L 2 )(btc)(H 2 O)] ( 3 ). It can be observed from the architectures of 1 – 3 that secondary ligands had great effects on the spatial connective fashions, resulting in the formation of various dimensional compounds. |
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