Electrochemical behavior of dopamine at a 3,3′-dithiodipropionic acid self-assembled monolayers

被引:48
作者
Codognoto, Lucia
Winter, Eduardo
Paschoal, Jonas A. R.
Suffredini, Hugo B.
Cabral, Murilo F.
Machado, Sergio A. S.
Rath, Susanne
机构
[1] Univ Estadual Campinas, Inst Chem, Dept Analyt Chem, BR-13084971 Campinas, SP, Brazil
[2] Fed Univ ABC, BR-09210170 Santo Andre, SP, Brazil
[3] Univ Sao Paulo, Inst Chem Sao Carlos, BR-13566590 Sao Carlos, SP, Brazil
基金
巴西圣保罗研究基金会;
关键词
self-assembled monolayers; 3,3 '-dithiodipropionic acid; dopamine; square-wave voltammetry; gold electrode;
D O I
10.1016/j.talanta.2006.10.045
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
Monolayers of 3,3'-dithiodipropionic acid (DTDPA) were prepared on a polycrystalline gold electrode through a self-assembly procedure to produce a gold 3,3'-dithiodipropionic acid self-assembled monolayer (AuDTDPA) modified electrode. The characterization of the AuDTDPA electrode was investigated by cyclic voltammetry and ac impedance using the [Fe(CN)(6)](3-/4-) redox couple. The electrochemical behavior of DA on the modified electrode AuDTDPA was studied by cyclic and square-wave voltammetries, using phosphate buffer as supporting electrolyte. The oxidation peak current for DA increases linearly with concentration in the range of 0.35 x 10(-5) to 3.4 x 10(-5) mol L-1. The performance of the AuDTDPA modified electrode was evaluated for the electroanalytical determination of dopamine (DA) in a pharmaceutical formulation. The AuDTDPA modified electrode showed a stable behavior and the presence of surface-COOH groups avoided the passivation of the electrode surface during the dopamine oxidation. (c) 2006 Elsevier B.V. All rights reserved.
引用
收藏
页码:427 / 433
页数:7
相关论文
共 33 条
[1]  
BERCHMANS S, 2005, J SOLID STATE ELECTR, P15
[2]   Surface functionalization for self-referencing surface plasmon resonance (SPR) biosensors by multi-step self-assembly [J].
Boozer, C ;
Yu, QM ;
Chen, SF ;
Lee, CY ;
Homola, J ;
Yee, SS ;
Jiang, SY .
SENSORS AND ACTUATORS B-CHEMICAL, 2003, 90 (1-3) :22-30
[3]  
CARVALHO RM, 2003, J ELECTROANAL CHEM, V19, P548
[4]   Effects of EDTA on signal stability during electrochemical detection of acetaminophen [J].
de Carvalho, RM ;
Freire, RS ;
Rath, S ;
Kubota, LT .
JOURNAL OF PHARMACEUTICAL AND BIOMEDICAL ANALYSIS, 2004, 34 (05) :871-878
[5]   Square wave voltammetry. Second part: Applications [J].
de Souza, D ;
Codognoto, L ;
Malagutti, AR ;
Toledo, RA ;
Pedrosa, VA ;
Oliveira, RTS ;
Mazo, LH ;
Avaca, LA ;
Machado, SAS .
QUIMICA NOVA, 2004, 27 (05) :790-797
[6]   Self-catalysis by catechols and quinones during heterogeneous electron transfer at carbon electrodes [J].
DuVall, SH ;
McCreery, RL .
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2000, 122 (28) :6759-6764
[7]   Parameters important in fabricating enzyme electrodes using self-assembled monolayers of alkanethiols [J].
Gooding, JJ ;
Erokhin, P ;
Losic, D ;
Yang, WR ;
Policarpio, V ;
Liu, JQ ;
Ho, FM ;
Situmorang, M ;
Hibbert, DB ;
Shapter, JG .
ANALYTICAL SCIENCES, 2001, 17 (01) :3-9
[8]   Electrochemical behavior of dopamine at a quercetin-SAM-modified gold electrode and analytical application [J].
Kang, JW ;
Zhuo, L ;
Lu, XQ ;
Wang, XQ .
JOURNAL OF SOLID STATE ELECTROCHEMISTRY, 2005, 9 (02) :114-120
[9]   Selective oxidation of dopamine and serotonin with an alkanethiol-modified electrode [J].
Kubo, I ;
Yoshimura, K ;
Ohashi, E .
ELECTROCHEMISTRY, 2006, 74 (02) :149-152
[10]   A voltammetric and FTIR-ATR study of the electropolymerization of phenol on platinum electrodes in carbonate medium - Influence of sulfide [J].
Lapuente, R ;
Cases, F ;
Garces, P ;
Morallon, E ;
Vazquez, JL .
JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1998, 451 (1-2) :163-171