An electrochemical and thin-layer spectroelectrochemical study of 2,3-diaminophenazine

作者：Jiao K^*; Cui GL; Yang T; Niu SY

来源：Acta Chimica Sinica, 2003, 61(4): 514-519.

• 2,3-diaminophenazine (DAP)
• electrochemistry
• spectroelectrochemistry
• electrode process

Cyclic voltammetry with a gold disc electrode and thin-layer cyclic voltammetry with a gold minigrid electrode of 2, 3-diaminophenazine (DAP) solutions in Britton-Robinson (B-R) buffer appear a pair of quasi-reversible redox peak. The diffusion coefficient and the standard rate constant of the electrode reaction of DAP in pH 2.0 B-R buffer are determined respectively, by cyclic voltammetry on a gold ultra-microelectrode and on a gold disc electrode. The electron transfer number as well as H+ order of the reaction is 2 from the results of the bulk electrolysis with coulometry and cyclic voltammetry. The formal potential of DAP is determined by UV-vis thin-layer spectroelectrochemistry. The electron transfer number from UV-vis thin-layer spectroelectrochemistry is in accordance with the result of above electrochemical experiment. The double potential step UV-vis thin-layer chronoabsorptiometry indicates that the electroreduction of DAP is not followed by chemical reaction. The reduction of DAP occurs via an H+ eH(+) e electrochemical mechanism and leads to 2,3-diamino-5,10-dihydrophendzine as product.

• 出版日期2003-4
• 单位青岛大学