Enhancing the electrochemiluminescence of tris(2,2′-bipyridyl) ruthenium(II) by ionic surfactants

Guobao Xu, Hei Leung Pang, Bo Xu, Shaojun Dong, Kwok Yin Wong

Research output: Journal article publicationJournal articleAcademic researchpeer-review

39 Citations (Scopus)

Abstract

The dependence of the electrochemiluminescence of Ru(bpy)32+(bpy = 2,2′-bipyridine) with tri-n-propylamine as co-reactant on the anionic surfactant SDS (sodium dodecyl sulfate) and the cationic surfactants CTAX (CTA = cetyltrimethylammonium cation, X = bromide, chloride and hydrogensulfate) was studied. Both SDS and CTAX, at low surfactant concentrations below the critical micelle concentrations, enhance the electrochemiluminescence at a platinum working electrode. A further enhancement of the light emission intensity by bromide ions was observed when CTAB (B = bromide) was used-an overall 30-fold increase in electrochemiluminescence efficiency was obtained at a CTAB concentration of 0.08 mM. Voltammetric data support adsorption of surfactant molecules on the electrode surface as the cause of the enhancement of electrochemiluminescence by ionic surfactants.
Original languageEnglish
Pages (from-to)541-544
Number of pages4
JournalAnalyst
Volume130
Issue number4
DOIs
Publication statusPublished - 1 Apr 2005

ASJC Scopus subject areas

  • Analytical Chemistry
  • Biochemistry
  • Environmental Chemistry
  • Spectroscopy
  • Electrochemistry

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