RESEARCH ARTICLE

 

Electrocatalytic activity of electropolymerized cobalt tetraaminophthalocyanine film modified electrode towards 6-mercaptopurine and 2-mercaptobenzimidazole

 

 

Jie-Ping Fan^{I,III, *}; Xiao-Min Zhang^III; MinYing^II,III

^ISchool of Environmental and Chemical Engineering, Nanchang University, Nanchang 330031, P. R. China
^IIZhejiang Wanli University, Ningbo 315100, P. R. China
^IIIEast China Institute of Technology, Fuzhou 344100, P. R. China

 

 

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ABSTRACT

The electrocatalytic activity of electropolymerized cobalt tetraaminophthalocyanine (poly-CoTAPc) film modified on the glassy carbon electrode (GCE) towards 6-mercaptopurine (6MP) and 2-Mercaptobenzimidazole (MBI) was studied. Comparing with the case at the unmodified GCE, the poly-CoTAPc film decreased the overpotential of oxidation of 6MP (1.0 x 10^-3 mol L^-1) and MBI (1.0 x 10^-3 mol L^-1) by 335 and 189 mV, respectively, and increased the peak current by about 3 and 2 times, respectively, while the reduction potential of the disulphide product of previous oxidation of 6MP shifted positively by 312 mV and the peak current increased by 40 times in 0.1 mol L^-1 phosphate buffer solution (PBS, pH = 2.0). The poly-CoTAPc film exhibited efficiently electrocatalytic activity for 6MP and MBI with relatively high sensitivity, stability and long-life.

Keywords: Electrocatalysis, 6-mercaptopurine, 2-mercaptobenzimidazole, cobalt tetraaminophthalocyanine, electropolymeric film

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Full text available only in PDF format.

 

Acknowledgements

We thank Professor Tebello Nyokong and Isaac Adebayo Akinbulu for useful discussion.The kind assistance of Professor Jean-Michel Savéant is gratefully acknowledged.

 

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Received 2 August 2010
Revised 20 September 2010
Accepted 26 September 2010

 

 

* To whom correspondence should be addressed. E-mail: jasperfan@163.com