Electrochemical investigation of Eu(III) with 25,27-dibenzyloxy-5,11,17,23-tetra-tert-butyl-26,28-dihydroxy-calix[4]aren e complex films on a glassy carbon electrode

摘要

The electrochemical behavior of films of Eu(III)-25,27-dibenzyloxy-5,11,17,23-tetra-tert-butyl-26,28-dihydroxycalix [4]arene (represented as Eu(III)-L) complex deposited by drop evaporation on the surface of a glassy carbon disk electrode was studied in both aqueous and a mixed solution of acetonitrile and water. It was observed that the film modified electrode, in the NaClO4 Solution, has one pair of well-defined and relatively stable reduction and oxidation peaks with E-pc = -0.690 V and E-pa = -0.470 V (vs. SCE). The effects of the concentration of supporting electrolyte, the surface coverage of Eu(III)-L, and solvent etc. on the voltammetry of the Eu(Ill)-L film modified electrode were investigated. In addition, the charge transport process of the modified electrode was discussed in detail by cyclic voltammetric and surface analysis experiments. [References: 17]