Effect of anionic micelles of sodium dodecyl sulfate on protonation equilibria of salicylic acid derivatives
| Autor: | Sattaru Gouthamsri, Gollapalli Nageswara Rao, M. Balakrishna, Malla Ramanaiah, Bendi Ramaraju |
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| Rok vydání: | 2016 |
| Předmět: |
protonation equilibria
Inorganic chemistry General Engineering Protonation 010501 environmental sciences 010402 general chemistry Mole fraction 01 natural sciences Micelle 0104 chemical sciences lcsh:Chemistry Solvent chemistry.chemical_compound lcsh:QD1-999 chemistry sodium dodecyl sulfate Salicylic acid derivatives Ionic strength MINIQUAD75 lcsh:Q 5-sulfosalicylic acid and 5-Hydroxysalicylic acid Sodium dodecyl sulfate lcsh:Science 0105 earth and related environmental sciences |
| Zdroj: | Cogent Chemistry, Vol 2, Iss 1 (2016) |
| ISSN: | 2331-2009 |
| DOI: | 10.1080/23312009.2016.1217762 |
| Popis: | The impact of sodium dodecyl sulfate (SDS) on the protonation equilibria of 5-sulfosalicylic acid and 5-Hydroxysalicylic acid has been studied in various concentrations (0.0−2.5% w/v) of sodium dodecyl sulfate solution maintaining an ionic strength of 0.16 mol dm−3 Nacl at 303 K. The protonation constants have been calculated with the computer program MINIQUAD75 and the best fit models are arrived at based on statistical grounds employing crystallographic R factor, χ2, skewness, and kurtosis. These protonation constants values have been found to shift in micellar media as compared to those in pure water. The differences in the values have been attributed to the solvent properties of the interfacial and bulk phases involving contribution from the micellar surface potential in the case of charged micelles. The trend of log values of stepwise protonation constants with mole fraction of the medium have been explained based on electrostatic and non-electrostatic forces operating on the protonation equilibria. Distributions of species, protonation equilibria, and effect of influential parameters on the protonation constants have also been presented. |
| Databáze: | OpenAIRE |
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