Abstract
The dimerization behavior of the methylviologen cation radical (MV**. ** plus ) in the presence of sodium dodecyl sulfate (SDS), sodium decyl sulfate (SdecS), and sodium poly(styrenesulfonate) (PSS) was examined by using the visible spectal characteristics of solutions containing electrogenerated MV**. ** plus +ZZThe results indicate that the concentration of either SDS or SdecS micellar aggregates exerts a strong effect on the extent of dimerization. Thus, negligible dimerization was found at high levels of surfactant while extensive dimerization was observed at surfactant concentrations slightly above the corresponding critical micelle concentrations. This behavior was reasonably well simulated by a simple computational model based on the Poisson distribution. The dimerization pattern in the presence of PSS was quite different. The polyelectrolyte was found to increase the dimerization level, throughout the entire concentration range surveyed (5-100 mM), over that found in isotropic aqueous solutions. This was interpreted as the result of MV**. ** plus clustering triggered by the polyelectrolyte chains.
| Original language | English |
|---|---|
| Pages (from-to) | 663-667 |
| Number of pages | 5 |
| Journal | Langmuir |
| Volume | 4 |
| Issue number | 3 |
| State | Published - May 1 1988 |
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ASJC Scopus subject areas
- Colloid and Surface Chemistry
- Physical and Theoretical Chemistry
Cite this
DIMERIZATION OF THE METHYLVIOLOGEN CATION RADICAL IN ANIONIC MICELLAR AND POLYELECTROLYTE SOLUTIONS. / Quintela, Pablo A.; Diaz, Abigail; Kaifer, Angel.
In: Langmuir, Vol. 4, No. 3, 01.05.1988, p. 663-667.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - DIMERIZATION OF THE METHYLVIOLOGEN CATION RADICAL IN ANIONIC MICELLAR AND POLYELECTROLYTE SOLUTIONS.
AU - Quintela, Pablo A.
AU - Diaz, Abigail
AU - Kaifer, Angel
PY - 1988/5/1
Y1 - 1988/5/1
N2 - The dimerization behavior of the methylviologen cation radical (MV**. ** plus ) in the presence of sodium dodecyl sulfate (SDS), sodium decyl sulfate (SdecS), and sodium poly(styrenesulfonate) (PSS) was examined by using the visible spectal characteristics of solutions containing electrogenerated MV**. ** plus +ZZThe results indicate that the concentration of either SDS or SdecS micellar aggregates exerts a strong effect on the extent of dimerization. Thus, negligible dimerization was found at high levels of surfactant while extensive dimerization was observed at surfactant concentrations slightly above the corresponding critical micelle concentrations. This behavior was reasonably well simulated by a simple computational model based on the Poisson distribution. The dimerization pattern in the presence of PSS was quite different. The polyelectrolyte was found to increase the dimerization level, throughout the entire concentration range surveyed (5-100 mM), over that found in isotropic aqueous solutions. This was interpreted as the result of MV**. ** plus clustering triggered by the polyelectrolyte chains.
AB - The dimerization behavior of the methylviologen cation radical (MV**. ** plus ) in the presence of sodium dodecyl sulfate (SDS), sodium decyl sulfate (SdecS), and sodium poly(styrenesulfonate) (PSS) was examined by using the visible spectal characteristics of solutions containing electrogenerated MV**. ** plus +ZZThe results indicate that the concentration of either SDS or SdecS micellar aggregates exerts a strong effect on the extent of dimerization. Thus, negligible dimerization was found at high levels of surfactant while extensive dimerization was observed at surfactant concentrations slightly above the corresponding critical micelle concentrations. This behavior was reasonably well simulated by a simple computational model based on the Poisson distribution. The dimerization pattern in the presence of PSS was quite different. The polyelectrolyte was found to increase the dimerization level, throughout the entire concentration range surveyed (5-100 mM), over that found in isotropic aqueous solutions. This was interpreted as the result of MV**. ** plus clustering triggered by the polyelectrolyte chains.
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M3 - Article
VL - 4
SP - 663
EP - 667
JO - Langmuir
JF - Langmuir
SN - 0743-7463
IS - 3
ER -