Transfer and adsorption of 1-pyrene sulfonate at the water vertical bar 1,2-dichloroethane interface studied by potential modulated fluorescence spectroscopy

K Nakatani*, H Nagatani, DJ Fermin, HH Girault

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)peer-review

Abstract

The transfer mechanism of 1-pyrene sulfonate anion (PSA(-)) across the polarized water \ 1.2-dichloroethane (DCE) interface was investigated by a combination of electrochemical techniques and potential modulated fluorescence (PMF) spectroscopy under total internal-reflection. The dependence of the cyclic voltammogram and the ac voltammogram on the PSA(-) concentration showed an apparent reversible ion transfer process. However, the PMF responses exhibited a complex dependence on the PSA(-) concentration, revealing adsorption and dimerization processes taking place at the interface. Analysis of the dynamic spectroelectrochemical responses suggests that PSA(-) is adsorbed at the interface prior to the transfer step. Upon transferring to the organic phase, PSA(-) appears to accumulate at the interface undergoing a dimerization reaction. (C) 2002 Elsevier Science B.V. All rights reserved.

Original languageEnglish
Pages (from-to)1-5
Number of pages5
JournalJournal of Electroanalytical Chemistry
Volume518
Issue number1
Publication statusPublished - 11 Jan 2002

Keywords

  • liquid vertical bar liquid interface
  • adsorption
  • ion transfer
  • dimerization
  • LIQUID-LIQUID INTERFACES
  • ION TRANSFER
  • WATER-VERTICAL-BAR-1,2-DICHLOROETHANE INTERFACE
  • WATER/1,2-DICHLOROETHANE INTERFACE
  • LIQUID/LIQUID INTERFACES
  • NITROBENZENE INTERFACE
  • ELECTRON-TRANSFER
  • ORANGE TRANSFER
  • CHARGE-TRANSFER
  • DYNAMICS

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