硝酸铕和穴醚配合物的电化学研究

Electrochemical Studies on Europium Nitrate Complexes with Cryptands

用循环伏安法在二氯甲烷、二氯乙烷、乙腈、丙酮,苯腈、吡啶、二甲基甲酰胺、二甲基亚砜等不同溶剂中,研究了稀土穴醚配合物Eu(NO_(3))_(3)(2,2)和Eu_(2)(NO_(3))_(6)(2,2,2)的电化学行为。测定了其氧化还原反应的半波电位及电子转移速度常数,讨论了E_(1/2)、ks与溶剂及支持电解质的关系。

Electrochemical reduction of europium cryptatcs Eu(NO_(3))_(3)(2,2)and Eu_(2)(NO_(3))_(6)(2,2,2)were investigated by means of cyclic voltametry in dichloro-methane,dichloroethane,acetonitrile,acetone,benzonitrile,pyridine,dimcthyl-formamidc and dimethyl sulioxide,The halfwave potentials of redox reaction and electron-transfer rate constants were determined,and the effects of solvent and supporting electrolyte on E1/2and kswere discussed.