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author:

Qiu, B. (Qiu, B..) [1] | Xue, L. (Xue, L..) [2] | Wu, Y. (Wu, Y..) [3] | Lin, Z. (Lin, Z..) [4] | Guo, L. (Guo, L..) [5] | Chen, G. (Chen, G..) [6]

Indexed by:

Scopus

Abstract:

Inhibited Ru(bpy)32+ electrochemiluminescence by inorganic oxidants is investigated. Results showed that a number of inorganic oxidants can quench the ECL of Ru(bpy)32+/tri-n- propylamine (TPrA) system, and the logarithm of the decrease in ECL intensity (ΔI) 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 ΔI versus the concentration of MnO4-, Cr2O72- and Fe(CN)63- are linear in the range of 1 × 10 -7 to 3 × 10-4 M for MnO4- and Cr2O72-, and 1 × 10-7 to 1 × 10-4 M for Fe(CN)63-, with the limit of detection (LOD) of 8.0 × 10-8 M, 2 × 10-8 M, and 1 × 10-8 M, respectively. A series of experiments such as a comparison of the inhibitory effect of different compounds on Ru(bpy) 32+/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)32+/TPrA system. A mechanism based on consumption of TPrA intermediate (TPrA·) by inorganic oxidants was proposed. © 2011 Elsevier B.V. All rights reserved.

Keyword:

Electrochemiluminescence; Inhibitory; Inorganic oxidants; Quenching

Community:

  • [ 1 ] [Qiu, B.]Department of Chemistry, Fuzhou University, Ministry of Education, Fuzhou, 350002, China
  • [ 2 ] [Xue, L.]Department of Chemistry, Fuzhou University, Ministry of Education, Fuzhou, 350002, China
  • [ 3 ] [Wu, Y.]Department of Chemistry, Fuzhou University, Ministry of Education, Fuzhou, 350002, China
  • [ 4 ] [Lin, Z.]Department of Chemistry, Fuzhou University, Ministry of Education, Fuzhou, 350002, China
  • [ 5 ] [Guo, L.]Department of Chemistry, Fuzhou University, Ministry of Education, Fuzhou, 350002, China
  • [ 6 ] [Chen, G.]Department of Chemistry, Fuzhou University, Ministry of Education, Fuzhou, 350002, China

Reprint 's Address:

  • [Guo, L.]Department of Chemistry, Fuzhou University, Ministry of Education, Fuzhou, 350002, China

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Source :

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

JCR Journal Grade:1

CAS Journal Grade:2

Cited Count:

WoS CC Cited Count:

SCOPUS Cited Count: 31

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 2

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