Novel coordination polymers with ferrocene-containing dicarboxylate ligand: Syntheses, crystal structures and properties |
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Authors: | Xia Li Wei Liu Hong-Yun Zhang Ben-Lai Wu |
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Institution: | aDepartment of Chemistry, Zhengzhou University, Zhengzhou 450052, PR China;bDepartment of Chemistry and Chemical Engineering, Pingdingshan Engineering College, Pingdingshan 467001, PR China |
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Abstract: | A new ferrocene-containing dicarboxylate ligand, L = 5-ferrocene-1,3-benzenedicarboxylic acid, has been prepared. Self-assembly of L, M(II) salts (M = Co and Zn) and chelating ligands dpa or phen (dpa = 2,2′-dipyridylamine and phen = 1,10-phen) gave rise to four new coordination polymers {Co(L)(dpa)] · 2MeOH}n (1), {Zn(L)(dpa)] · 2MeOH}n (2), {Co(L)(phen)(H2O)] · MeOH} (3), Zn(L)(phen)(H2O)] · MeOH (4). The isostructural complexes 1 and 2 possess 1D helical chain structures with 21 screw axes along the b-direction, and the right- and left-handed helical chains are alternate arrayed into 2D layer structures through hydrogen-bonding interactions; while isostructural complexes 3 and 4 are 1D linear chain structures with phen and ferrocene groups of L as pendants hanging on the different sides of the main chain. A structural comparison of complexes 1–4 demonstrated that the characteristics of subsidiary ligands and slight difference in coordination models of L play very important role in the construction of the complexes. In addition, the redox properties of complexes 1–4, as well as the magnetic properties of complexes 1 and 3 are also investigated. |
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Keywords: | Ferrocene-containing dicarboxylate Coordination polymer 1D helical chain Co(II) complex Zn(II) complex |
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