Electrocatalytic Behavior of Glassy Carbon Electrodes Modified with Multiwalled Carbon Nanotubes and Cobalt Phthalocyanine for Selective Analysis of Dopamine in Presence of Ascorbic Acid
作者： Fernando Cruz Moraes , Murilo F Cabral , Sergio AS Machado , Lucia H Mascaro , None
关键词: Cyclic voltammetry 、 Carbon nanotube 、 Glassy carbon 、 Electrode 、 Chemistry 、 Differential pulse voltammetry 、 Electrochemistry 、 Ascorbic acid 、 Inorganic chemistry 、 Dielectric spectroscopy
摘要: This work describes the development, electrochemical characterization and utilization of a cobalt phthalocyanine modified carbon nanotube electrode for quantitative determination dopamine in 0.2 mol L � 1 phosphate buffer contaminated with high concentration ascorbic acid. The surface was analyzed by cyclic voltammetry impedance spectroscopy which showed presenting charge transfer resistance 500 W, against 16.46 kW value found bare glassy surface. A pseudo rate constant 5.4 10 4 cm s oxidation calculated. Voltammetric experiments shift peak potential DA to less positive at 390 mV as compared that GC 570 mV. dopamine, presence acid concentrations up 0.1 differential pulse voltammetry, yielded detection limit low 2.56 7
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Alan P. Brown, Fred C. Anson, CYCLIC AND DIFFERENTIAL PULSE VOLTAMMETRIC BEHAVIOR OF REACTANTS CONFINED TO THE ELECTRODE SURFACE. Analytical Chemistry. ,vol. 49, pp. 1589- 1595 ,(1977) , 10.1021/AC50019A033
Kuanping Gong, Yu Dong, Shaoxiang Xiong, Yi Chen, Lanqun Mao, Novel electrochemical method for sensitive determination of homocysteine with carbon nanotube-based electrodes Biosensors and Bioelectronics. ,vol. 20, pp. 253- 259 ,(2004) , 10.1016/J.BIOS.2004.01.014
Liyun Zhao, Hongyun Liu, Naifei Hu, Electroactive films of heme protein-coated multiwalled carbon nanotubes Journal of Colloid and Interface Science. ,vol. 296, pp. 204- 211 ,(2006) , 10.1016/J.JCIS.2005.08.041
J. Costamagna, G. Ferraudi, B. Matsuhiro, M. Campos-Vallette, J. Canales, M. Villagrán, J. Vargas, M.J. Aguirre, Complexes of macrocycles with pendant arms as models for biological molecules Coordination Chemistry Reviews. ,vol. 196, pp. 125- 164 ,(2000) , 10.1016/S0010-8545(99)00165-4
Valber A. Pedrosa, Sergio A. S. Machado, Luis A. Avaca, Application of a Deconvolutive Procedure to Analyze Several Chlorophenol Species in Natural Waters by Square‐Wave Voltammetry on the Boron‐Doped Diamond Electrode Analytical Letters. ,vol. 39, pp. 1955- 1965 ,(2006) , 10.1080/00032710600723783
Xianbao Wang, Yunqi Liu, Wenfeng Qiu, Daoben Zhu, Immobilization of tetra-tert-butylphthalocyanines on carbon nanotubes: a first step towards the development of new nanomaterials Journal of Materials Chemistry. ,vol. 12, pp. 1636- 1639 ,(2002) , 10.1039/B201447E
Protiva Rani Roy, Takeyoshi Okajima, Takeo Ohsaka, Simultaneous electroanalysis of dopamine and ascorbic acid using poly (N,N-dimethylaniline)-modified electrodes. Bioelectrochemistry. ,vol. 59, pp. 11- 19 ,(2003) , 10.1016/S1567-5394(02)00156-1
Shuai Yuan, Wanhua Chen, Shengshui Hu, None, Fabrication of TiO2 nanoparticles/surfactant polymer complex film on glassy carbon electrode and its application to sensing trace dopamine Materials Science and Engineering: C. ,vol. 25, pp. 479- 485 ,(2005) , 10.1016/J.MSEC.2004.12.004
Jing Chen, Jianchun Bao, Chenxin Cai, Tianhong Lu, Electrocatalytic oxidation of NADH at an ordered carbon nanotubes modified glassy carbon electrode Analytica Chimica Acta. ,vol. 516, pp. 29- 34 ,(2004) , 10.1016/J.ACA.2004.03.077
R.M. Wightman, C. Amatorh, R.C. Engstrom, P.D. Hale, E.W. Kristensen, W.G. Kuhr, L.J. May, Real-time characterization of dopamine overflow and uptake in the rat striatum. Neuroscience. ,vol. 25, pp. 513- 523 ,(1988) , 10.1016/0306-4522(88)90255-2