稀土铕与穴醚（2．2．2）配合物的电化学还原反应

Electrochemical Reduction of Complex of Europium Nitrate with Cryptand (2.2.2)

用循环伏安法讨论了在二氯甲烷、二氯乙烷、乙腈、丙酮、苯腈、吡啶、二甲基甲酰胺、二甲基亚砜等不同质子惰性溶剂中，硝酸铕与穴醚（２．２．２）配合物的电化学行为。结果表明，溶剂介质和大环醚的结构对Ｅｕ３＋与穴醚配合物的氧化还原反应有显著影响。此外，讨论了扫描速率，电活性物质浓度等对伏安图的影响。

Electrochemical behavior of complex of europium nitrate with cryptand (2.2.2) have been investigated by means of cyclic voltammetry in aprotic solvents. Significant effect of solvent and structure of macrocyclic ethers on the reduction processes is found. Coordination of cryptand in weak bonding solvents is favorable to stabilize the divalent europium so that the halfwave potentials Eu3+ for reduction reaction shifts anodically 50￣200mV. Farthermore, the effect of the scan rate and the concentrations of electroactive species on the curves of CV are discussed.