The impact of the structuring of hydrotropes in water on the mesoscale solubilisation of a third hydrophobic component
| Autor: | R. Winkler, Arno Pfitzner, Didier Touraud, Pierre Bauduin, Werner Kunz, Isabelle Grillo, Sebastian Krickl, Thomas Buchecker |
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| Přispěvatelé: | Univ Regensburg, Inst Inorgan Chem, D-93040 Regensburg, Germany, Univ Regensburg, Inst Phys & Theoret Chem, D-93040 Regensburg, Germany, Institut Laue-Langevin (ILL), ILL, Institut de Chimie Séparative de Marcoule (ICSM - UMR 5257), Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Montpellier (UM)-Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Institut de Chimie du CNRS (INC)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS) |
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Octanol
ddc:540 Supramolecular chemistry General Physics and Astronomy Salt (chemistry) 02 engineering and technology Conductivity 010402 general chemistry 01 natural sciences chemistry.chemical_compound Dynamic light scattering Organic chemistry [CHIM]Chemical Sciences Physical and Theoretical Chemistry chemistry.chemical_classification [PHYS]Physics [physics] 021001 nanoscience & nanotechnology 6. Clean water 0104 chemical sciences Partition coefficient chemistry Chemical engineering Benzyl alcohol 540 Chemie 0210 nano-technology Ternary operation |
| Zdroj: | 'Physical Chemistry Chemical Physics ', vol: 19, pages: 1806-1816 (2017) Physical Chemistry Chemical Physics Physical Chemistry Chemical Physics, Royal Society of Chemistry, 2017, 19 (3), pp.1806-1816. ⟨10.1039/c6cp06696h⟩ Physical Chemistry Chemical Physics, 2017, 19 (3), pp.1806-1816. ⟨10.1039/c6cp06696h⟩ |
| ISSN: | 1463-9076 1463-9084 |
| DOI: | 10.1039/c6cp06696h⟩ |
| Popis: | International audience; In the present contribution, the pre-structuring of binary mixtures of hydrotropes and H2O is linked to the solubilisation of poorly water miscible compounds. We have chosen a series of short-chain alcohols as hydrotropes and benzyl alcohol, limonene and a hydrophobic azo-dye (Disperse Red 13) as organic compounds to be dissolved. A very weak pre-structuring is found for ethanol/H2O and 2-propanol/H2O mixtures. Pre-structuring is most developed for binary 1-propanol/H2O and tert-butanol/H2O mixtures and supports the bicontinuity model of alcohol-rich and water-rich domains as already postulated by Anisimov et al. Such a pre-structuring leads to a high solubilisation power for poorly water miscible components (limonene and Disperse Red, characterized by high octanol/water partition coefficients, log(P) values of 4.5 and 4.85), whereas a very weak pre-structuring leads to a high solubilisation power for slightly water miscible components (benzyl alcohol). This difference in solubilisation power can be linked to (i) the formation of mesoscale structures in the cases of ethanol and 2-propanol and (ii) the extension of pre-structures in the cases of 1-propanol and tert-butanol. Three different solubilisation mechanisms could be identified: bulk solubilisation, interface solubilisation and a combination of both. These supramolecular structures in binary and ternary systems were investigated by small-and-wide-angle X-ray and neutron scattering, dynamic light scattering and conductivity measurements (in the presence of small amounts of salt) |
| Databáze: | OpenAIRE |
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