Tools
ToolsMarken, Frank, Hayman, Colin M. and Bulman Page, Philip C. (2002) Phosphate and arsenate electro-insertion processes into a N,N,N ',N'-tetraoctylphenylenediamine redox liquid. Electrochemistry Communications, 4 (5). pp. 462-467. ISSN 1388-2481
Full text not available from this repository.Abstract
The electro-insertion of ions is a well-known phenomenon, which allows the transfer of anions or cations across phase boundaries to be monitored and driven electro-chemically. Extremely hydrophilic anions, such as phosphate and arsenate, are not usually observed to undergo electro-insertion. It is shown here that at organic redox liquid\ water/electrode triple interfaces these anions can be forced electro-chemically to transfer into organic media. The transfer process of phosphate anions from aqueous buffer solutions into organic microdroplets of the redox liquid N,N,N',N'-tetraoctylphenylenediamine (TOPD) is pH and concentration sensitive. It is shown that phosphate is transferred in the form Of PO4HK- in the presence of phosphate buffer. Two distinct potential regions are identified and attributed to (i) interfacial redox processes at the liquid/liquid interface associated with deprotonation and (ii) bulk redox processes associated with anion transfer from the aqueous to the organic phase. The comparison of phosphate and arsenate electro-insertion processes suggests that arsenate is less hydrophilic and transferred into the organic phase preferentially. (C) 2002 Published by Elsevier Science B.V.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | systems,electro-insertion,voltammetry,triple phase boundary,arsenate,graphite-electrodes,phosphate,ion,microdroplets,liquid vertical bar liquid boundary,interfaces,voltammetry,ion exchange |
| Faculty \ School: | Faculty of Science > School of Chemistry (former - to 2024) |
| UEA Research Groups: | Faculty of Science > Research Groups > Chemistry of Materials and Catalysis Faculty of Science > Research Groups > Synthetic Chemistry (former - to 2017) |
| Depositing User: | Rachel Smith |
| Date Deposited: | 21 Jun 2011 10:51 |
| Last Modified: | 24 Sep 2024 10:18 |
| URI: | https://ueaeprints.uea.ac.uk/id/eprint/32836 |
| DOI: | 10.1016/S1388-2481(02)00345-4 |
Actions (login required)
 |
View Item |