Thiol derivatized aza-15-crown-5-ether (15C5) was synthesized and modified on a gold electrode surface as the self-assembled monolayer. The effects of the alkali metal ions on the CV response of the Fe(CN)63- probe ion at the modified electrode were investigated with changing alkali metal ion. The CV response was decreased in the order of Rb+ ≥ K+ > Li+ ≫ Na+. The results are discussed in relation to the interaction between the crown ring and the alkali metal ions.
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