Deactivation of the ruthenium excited state by enhanced homogeneous charge transport: implications for electrochemiluminescent thin film sensors

Emmet J. O'Reilly, Tia E. Keyes, Robert J. Forster, Lynn Dennany

Research output: Contribution to journalArticle

8 Citations (Scopus)
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Abstract

The electrochemiluminescent (ECL) performance of three ruthenium-based metallopolymer platforms with different homogeneous charge transfer diffusion coefficients (DCT) is reported. Significantly, simultaneous detection of light and current in tandem with steady-state photoluminescence studies demonstrate that increasing the rate of Ru3+ production via enhanced charge transport results in a decrease in ECL intensity of up to 82% when the concentration of the co-reactant, sodium oxalate, is low, i.e., sub-mM. Spectroelectrochemical studies demonstrate that for maximum sensitivity to be obtained, the electroactive properties of the polymeric support matrix need to be considered in tandem with luminophore, analyte and co-reactant concentrations.
Original languageEnglish
Pages (from-to)90-93
Number of pages4
JournalElectrochemistry Communications
Volume86
Early online date23 Nov 2017
DOIs
Publication statusPublished - 31 Jan 2018

Keywords

  • electrochemiluminescence (ECL)
  • [Ru(bpy)3]2+
  • ECL sensor design
  • electroactive polymers
  • chemiluminescence
  • quenching

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