Flow-through Electrochemical Surface Plasmon Resonance: Detection of intermediate reaction products

Xinping Huang, Shaopeng Wang, Xiaonan Shan, Xijun Chang, Nongjian Tao

Research output: Contribution to journalArticlepeer-review

20 Scopus citations


The electrochemical reaction of hydroquinone-benzoquinone (HQ-BQ) system in acetonitrile was studied by a flow-through Electrochemical Surface Plasmon Resonance (EC-SPR) technique. The semiquinone radical anion (BQ •-) was detected as a large negative SPR shift for the first time by the hyphenated technique. The real time SPR signal shows the entire reaction process of the BQ•- including generation, transformation and disappearance. The lifetime of the BQ•- in the reaction was extracted by comparing the SPR signals along the flow stream. The study demonstrates that the flow-through EC-SPR is a powerful tool for monitoring not only surface bindings, but also solution phase chemical reactions. In addition, it is especially suitable for detecting unstable intermediate reaction products, which are difficult to measure using conventional analytical methods.

Original languageEnglish (US)
Pages (from-to)37-41
Number of pages5
JournalJournal of Electroanalytical Chemistry
Issue number1-2
StatePublished - Nov 15 2010


  • Benzoquinone
  • Chronoamperometry
  • Cyclic voltammetry
  • Electrochemical Surface Plasmon Resonance
  • Hydroquinone
  • Radical

ASJC Scopus subject areas

  • Analytical Chemistry
  • General Chemical Engineering
  • Electrochemistry


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