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 language | English |
|---|---|
| Pages (from-to) | 1-5 |
| Number of pages | 5 |
| Journal | Journal of Electroanalytical Chemistry |
| Volume | 518 |
| Issue number | 1 |
| Publication status | Published - 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