期刊
TALANTA
卷 106, 期 -, 页码 174-180出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.talanta.2012.12.025
关键词
Quenching of electrochemiluminescence; Ru(bpy)(3)(2+); TPA; Resonance energy transfer; Malachite green; Crystal violet
资金
- National Natural Science Foundation of China [21175108, 21165016, 21165015]
- Science and Technology Support Projects of Gansu Province [090GKCA036, 1011GKCA025]
- Key Laboratory of Polymer Materials of Gansu Province, China
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.
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