Synthesis,binding properties and electrochemistry of nickel(II) macrocyclic complexes containing crown ethers |
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| Institution: | 1. Department of Chemistry, Sunchon National University, Sunchon 540-742, South Korea;2. Department of Chemistry, Chonbuk National University, Chonju 561-756, South Korea;3. Department of Chemistry, Chonnam National University, Kwangiu 500-742, South Korea |
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| Abstract: | Macrotetracyclic complexes of nickel(II) containing crown ethers as pendant arms, Ni(B)](ClO4)2 and Ni(C)](ClO4)2, were prepared and characterized. The binding constants of the complexes toward alkali metal ions are relatively small compared with those of free 15-crown-5 or 18-crown-6 and the reduction potentials of the Ni(B)](ClO4)2 and Ni(C)](ClO4)2 in the presence of alkali metal ions shift to the positive direction in the order Li+>Na+>K+ and K+>Na+>Li+, respectively. |
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