Abstrakti
Electrosynthesis of polypyrrole (PPy) was studied in aqueous lithium iodide solution. The electrochemical polymerization showed features of two-dimensional growth and the reaction was catalyzed by the I-2/I- couple. The potentiometric response of PPy doped with iodide (PPy(I)) was studied both in iodide solutions and solutions containing the redox couple I-2/I- with a fixed concentration ratio 0.4 but varying the initial concentration of iodide in the range 10(-5)-1.0 M. Linear, anionic response was observed in the concentration range 10(-1)-10(-3) M when only iodide species was present. However, contribution of the redox response to the overall potentiometric response increased with increasing concentration of I-2 although the concentration ration between iodine/iodide was kept constant. The influence of phosphate buffer on the electroactivity of PPy doped with iodide was also studied.
| Alkuperäiskieli | Ei tiedossa |
|---|---|
| Sivut | 217–225 |
| Sivumäärä | 9 |
| Julkaisu | Analytica Chimica Acta |
| Vuosikerta | 355 |
| Numero | 2-3 |
| DOI - pysyväislinkit | |
| Tila | Julkaistu - 1997 |
| OKM-julkaisutyyppi | A1 Julkaistu artikkeli, soviteltu |
Keywords
- iodide
- iodine
- phosphate buffer
- polypyrrole
- potentiometry
- two-dimensional growth