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Inhibited Ru(bpy)(3)(2+) electrochemiluminescence by inorganic oxidants is investigated. Results showed that a number of inorganic oxidants can quench the ECL of Ru(bpy)(3)(2+)/tri-n-propylamine (TPrA) system, and the logarithm of the decrease in ECL intensity (6,1) was proportional to the logarithm of analyte concentrations. Based on which, a sensitive approach for detection of these inorganic oxidants was established, e.g. the log-log plots of AI versus the concentration of MnO4-, Cr2O77- and Fe(CN)(6)(3-) are linear in the range of 1 x 10(-7) to 3 x 10(-4) m for MnO4- and Cr2O77-, and 1 x 10(-7) to 1 x 10(-4) M for Fe(CN)(6)(3-), with the limit of detection (LOD) of 8.0 x 10(-8) M, 2 x 10(-8) M, and 1 x 10(-8) M, respectively. A series of experiments such as a comparison of the inhibitory effect of different compounds on Ru(bpy)(3)(2+)/TPrA ECL, ECL emission spectra, UV-Vis absorption spectra etc. were investigated in order to discover how these inorganic analytes quench the ECL of Ru(bpy)(3)(2+)/TPrA system. A mechanism based on consumption of TPrA intermediate (TPrA.) by inorganic oxidants was proposed. (C) 2011 Elsevier B.V. All rights reserved.
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TALANTA
ISSN: 0039-9140
Year: 2011
Issue: 1
Volume: 85
Page: 339-344
3 . 7 9 4
JCR@2011
5 . 6 0 0
JCR@2023
ESI Discipline: CHEMISTRY;
JCR Journal Grade:1
CAS Journal Grade:2
Cited Count:
WoS CC Cited Count: 30
SCOPUS Cited Count: 31
ESI Highly Cited Papers on the List: 0 Unfold All
WanFang Cited Count:
Chinese Cited Count:
30 Days PV: 1
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