Quenching of the electrochemiluminescence of Ru(bpy)32+/TPA by malachite green and crystal violet
Quenching of the electrochemiluminescence of Ru(bpy)32+/TPA by malachite green and crystal violet
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DOI：
10.1016/j.talanta.2012.12.025
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发表时间：
2013-03-15
期刊：
影响因子：
6.1
通讯作者：
Lu, Xiaoquan
中科院分区：
文献类型：
--
作者：
Huang, Baomei;Zhou, Xibin;Lu, Xiaoquan
报道了孔雀石绿（MG）和结晶紫（CV）在玻璃碳（GC）电极上高效稳定地猝灭Ru(bpy)(3)(2+)/TPA的电化学发光。提出了一种新的淬火机理。提出了从激发态发光团Ru(bpy)(3)(2+)*到MG/CV的共振能量转移和动态猝灭是ECL的猝灭机理，并基于紫外可见吸收光谱、循环伏安图、ECL曲线和荧光方法对其猝灭机理进行了详细讨论。MG的淬火效率高于CV。在MG浓度为8 × 10(-10) ~ 8 × 10(-7) M和CV浓度为3.46 × 10(-9) ~ 5.5 × 10(-7) M范围内，淬灭ECL强度与MG和CV浓度呈线性关系。MG的检出限为1.0 × 10(-10) M， CV的检出限为1.1 × 10(-10) M （S/N=3）。(C) 2013 Elsevier B.V.版权所有
Efficient and stable quenching of electrochemiluminescence of Ru(bpy)(3)(2+)/TPA by malachite green(MG) and crystal violet(CV) at the glass carbon (GC) electrode is reported. A novel quenching mechanism has been proposed. Resonance energy transfer from the excited-state luminophore Ru(bpy)(3)(2+)* to MG/CV and dynamic quenching are suggested as the mechanism for quenching ECL The quenching mechanism is discussed in detail based on UV-visible absorption spectra, cyclic voltammograms, ECL curves and fluorescence methods. MG shows more efficient quenching than CV. Moreover, the quenched ECL intensity versus the concentration of MG and CV are linear over the concentration ranges of 8 x 10(-10)-8 x 10(-7) M and 3.46 x 10(-9)-5.5 x 10(-7) M, respectively. The corresponding limit of detection (LOD) was 1.0 x 10(-10) M for MG and 1.1 x 10(-10) M for CV (S/N=3). (C) 2013 Elsevier B.V. All rights reserved.