| Autor: |
El Seoud, O. A., Shimizu, Maria R. |
| Zdroj: |
Colloid & Polymer Science; August 1982, Vol. 260 Issue: 8 p794-798, 5p |
| Abstrakt: |
ApparentpKa values of thymol blue solubilized in Aerosol-OT reversed micelles in carbon tetrachloride at 25 °C were determined spectrophotometrically. The effects of the Aerosol-OT concentration and the (water)/(surfactant)R ratio were investigated. The apparentpKa values increase as a function of increasing (R). All the measuredpKa values are less than that in water. The decrease ranges from 1.23 units (detergent=0.4 M,R=1.39) to 0.42 units (Aerosol-OT=0.6 M,R=9,25). These results are rationalized in terms of decreased hydronium ion activity in the micellar core due to its binding to the detergent SO3- groups. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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