Detection of the Short-Lived Radical Cation Intermediate in the Electrooxidation of N,N-Dimethylaniline by Mass Spectrometry

Timothy A. Brown, Hao Chen, Richard N. Zare

Research output: Contribution to journalArticlepeer-review

53 Scopus citations

Abstract

The N,N-dimethylaniline (DMA) radical cation DMA.+, a long-sought transient intermediate, was detected by mass spectrometry (MS) during the electrochemical oxidation of DMA. This was accomplished by coupling desorption electrospray ionization (DESI) MS with a waterwheel working electrode setup to sample the surface of the working electrode during electrochemical analysis. This study clearly shows that DESI-based electrochemical MS is capable of capturing electrochemically generated intermediates with half-lives on the order of microseconds, which is 4–5 orders of magnitude faster than previously reported electrochemical mass spectrometry techniques.

Original languageEnglish (US)
Pages (from-to)11183-11185
Number of pages3
JournalAngewandte Chemie - International Edition
Volume54
Issue number38
DOIs
StatePublished - Sep 14 2015
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Catalysis
  • Chemistry(all)

Keywords

  • DESI
  • dimethylaniline
  • electrochemistry
  • mass spectrometry
  • radical ions

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