Mechanism for inhibition of Ru(bpy)32+/DBAE electrochemiluminescence system by dopamine

被引：68

作者：

Xue, Lingling ^{[1
]}

Guo, Longhua ^{[1
]}

Qiu, Bin ^{[1
]}

Lin, Zhenyu ^{[1
]}

Chen, Guonan ^{[1
]}

机构：

[1] Fuzhou Univ, Dept Chem, Minist Educ, Key Lab Anal & Detect Technol Food Safety, Fuzhou 350002, Peoples R China

来源：

ELECTROCHEMISTRY COMMUNICATIONS | 2009年 / 11卷 / 08期

关键词：

Electrochemiluminescence; Dopamine; 2-(Dibutylamino)ethanol; Ru(bpy)(3)(2+); Inhibition; ELECTROGENERATED CHEMILUMINESCENCE; IN-VIVO; CATECHOLAMINES; ASSAY;

D O I：

10.1016/j.elecom.2009.05.059

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Recently, 2-(dibutyiamino)ethanol (DBAE) was reported to be a more efficient co-reactant than the widely used tripropylamine (TPrA) for electrochemiluminescence (ECL) of Ru(bpy)(3)(2+). Therefore, the new Ru(bpy)(3)(2+)/DBAE ECL system seemed to be great potential for its application in analytical chemistry. Dopamine (DA) was found to be able to inhibit the ECL of Ru(bpy)(3)(2+)/DBAE system. Under the optimum conditions, the logarithmic plot of the inhibited ECL versus the concentration of DA was linear in the range of 5 x 10(-10)-7 x 10(-7) M with the detection limit of 4.0 x 10(-11) M. A mechanism based on the quenching of reductive-form DBAE by DA-oxidation products was proposed, which was quite different from the mechanism for Ru(bpy)(3)(2+)/TPrA/DA system reported previously. (C) 2009 Elsevier B.V. All rights reserved .

引用

页码：1579 / 1582

页数：4

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