Co-reactant-on-Demand ECL: Electrogenerated Chemiluminescence by the in Situ Production of S2O82- at Boron-Doped Diamond Electrodes

A novel co-reactant-free electrogenerated chemiluminescence (ECL) system is developed where Ru(bpy)32+ emission is obtained on boron-doped diamond (BDD) electrodes. The method exploits the unique ability of BDD to operate at very high oxidation potential in aqueous solutions and to promote the conve...

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Bibliographic Details
Published in:Journal of the American Chemical Society 2016-12, Vol.138 (48), p.15636-15641
Main Authors: Watanabe, Takeshi, Fiorani, Andrea, Valenti, Giovanni, Paolucci, Francesco, Einaga, Yasuaki
Format: Article
Language:English
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Summary:A novel co-reactant-free electrogenerated chemiluminescence (ECL) system is developed where Ru(bpy)32+ emission is obtained on boron-doped diamond (BDD) electrodes. The method exploits the unique ability of BDD to operate at very high oxidation potential in aqueous solutions and to promote the conversion of inert SO42- into the reactive co-reactant S2O82-. This novel procedure is rather straightforward, not requiring any particular electrode geometry, and since the co-reactant is only generated in situ, the interference with biological samples is minimized. The underlying mechanism is similar to that of the Ru(bpy)32+/S2O82- system; however, the intensity of the emitted signal increases linearly with [SO42-] up to ∼0.6 M, with possible implications for analytical uses of the proposed procedure.
ISSN:1520-5126
DOI:10.1021/jacs.6b09020