Ethylenediaminetetraacetate (EDTA) was chosen for the investigation of the effect of metal ions on Ru(bpy)32+ electrochemiluminescence (ECL). Metal ions that are preferentially bound to the oxygen atoms (MIO) have no effect on the intensity of ECL except for Al3+ and Y3+, whereas metal ions that are preferentially bound to the nitrogen atoms (MIN) preclude the oxidation of EDTA and decrease the ECL intensity.
G. Xu and S. Dong, Analyst, 1999, 124, 1085 DOI: 10.1039/A901153F
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