Mechanism for inhibition of Ru(bpy)(3)(2 )/DBAE electrochemiluminescence system by dopamine

作者：Xue Lingling; Guo Longhua; Qiu Bin; Lin Zhenyu^*; Chen Guonan

来源：Electrochemistry Communications, 2009, 11(8): 1579-1582.

DOI：10.1016/j.elecom.2009.05.059

• Electrochemiluminescence
• Dopamine
• 2-(Dibutylamino)ethanol
• Ru(bpy)(3)(2 )
• Inhibition

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.

• 出版日期2009-8
• 单位福州大学