A new stable Fe(CN)(6)(3-/4-)-immobilized poly(butyl viologen)-modified electrode for dopamine determination

作者：Hsu Chih Yu; Vasantha V S; Chen Po Yen; Ho Kuo Chuan^*

来源：Sensors and Actuators B: Chemical , 2009, 137(1): 313-319.

DOI：10.1016/j.snb.2008.11.014

• Dopamine
• Electrocatalysis
• Ferrocyanide
• Mediated oxidation
• Poly(butyl viologen)

A new kind of highly stable Fe(CN)(6)(3-/4-)/poly(butyl viologen) (PBV) thin film, without any sealing layer. as modified electrode for dopamine oxidation was proposed. In this work, Fe(CN)(6)(4-), were entrapped within the PBV film to form a charge transfer complex. The electrochemical and electrocatalytic properties were studied using cyclic voltammetry (CV) and amperometric techniques, in conjunction with a rotating-disk electrode. The results show a highly stable and symmetric redox behavior for the Fe(CN)(6)(3-/4-) couple with peak-peak separation of 3 mV at a scan rate of 5 mV/s. The electron transfer rate constant for the Fe(CN)(6)(3-/4-) couple within the film, the catalytic rate constant between dopamine and Fe(CN)(6)(3-/4-), and the Michaelis-Menton constants are investigated. Moreover, the result shows all excellent mediation for dopamine oxidation.

• 出版日期2009-3-28