Co-reactant-on-Demand ECL: Electrogenerated Chemiluminescence by the in Situ Production of S2O8 2- at Boron-Doped Diamond Electrodes

Irkham, Takeshi Watanabe, Andrea Fiorani, Giovanni Valenti, Francesco Paolucci, Yasuaki Einaga

Research output: Contribution to journalArticlepeer-review

54 Citations (Scopus)

Abstract

A novel co-reactant-free electrogenerated chemiluminescence (ECL) system is developed where Ru(bpy)3 2+ 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 SO4 2- into the reactive co-reactant S2O8 2-. 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)3 2+/S2O8 2- system; however, the intensity of the emitted signal increases linearly with [SO4 2-] up to ∼0.6 M, with possible implications for analytical uses of the proposed procedure.

Original languageEnglish
Pages (from-to)15636-15641
Number of pages6
JournalJournal of the American Chemical Society
Volume138
Issue number48
DOIs
Publication statusPublished - 2016 Dec 7

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)
  • Biochemistry
  • Colloid and Surface Chemistry

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