Solubility and preferential solvation of some n-alkyl-parabens in methanol + water mixtures at 298.15 K
Methyl, ethyl and propyl parabens equilibrium solubility was determined in (methanol + water) binary mixtures at 298.15 K. The mole fraction solubility of these compounds increased in 503 (from 2.40 × 10-4to 0.121), 1377 (from 9.86 × 10-5to 0.136) and 4597 (from 3.73 × 10-5to 0.171) times when passi...
| Autores: | , , , , , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2023 |
| País: | Colombia |
| Institución: | Universidad Cooperativa de Colombia |
| Repositorio: | Repositorio UCC |
| OAI Identifier: | oai:repository.ucc.edu.co:20.500.12494/49542 |
| Acceso en línea: | https://doi.org/10.1016/j.jct.2017.01.005 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85009228822&doi=10.1016%2fj.jct.2017.01.005&partnerID=40&md5=ae11b6c45c8a3bdefd9438dbe3d2246d https://hdl.handle.net/20.500.12494/49542 |
| Access Level: | acceso abierto |
| Palabra clave: | INVERSE KIRKWOOD-BUFF INTEGRALS JOUYBAN-ACREE MODE LMETHANOL + WATER MIXTURES PARABENS PREFERENTIAL SOLVATION SOLUBILITY |
| Sumario: | Methyl, ethyl and propyl parabens equilibrium solubility was determined in (methanol + water) binary mixtures at 298.15 K. The mole fraction solubility of these compounds increased in 503 (from 2.40 × 10-4to 0.121), 1377 (from 9.86 × 10-5to 0.136) and 4597 (from 3.73 × 10-5to 0.171) times when passing from neat water to neat methanol, for methyl, ethyl and propyl parabens, respectively. All these solubility values were correlated with the Jouyban-Acree model. Preferential solvation parameters by methanol (dx1,3) of these parabens were derived from their thermodynamic solution properties using the inverse Kirkwood-Buff integrals (IKBI) method. For all compounds dx1,3values are negative in water-rich mixtures but positive in mixtures with methanol mole fraction greater than 0.32. It is conjecturable that in the former case the hydrophobic hydration around non-polar groups of parabens plays a relevant role in the solvation. Besides, the preferential solvation of these solutes by methanol in mixtures of similar co-solvent compositions and in methanol-rich mixtures could be explained in terms of the higher basic behaviour of methanol. © 2017 Elsevier Ltd |
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