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Hydrophobicity of ionisable compounds studied by countercurrent chromatography.
dc.contributor.author | Carda-Broch, Samuel | |
dc.contributor.author | Ruiz Ángel, M. J. | |
dc.contributor.author | Levet, A. | |
dc.contributor.author | Berthod, A. | |
dc.date.accessioned | 2012-11-02T15:30:49Z | |
dc.date.available | 2012-11-02T15:30:49Z | |
dc.date.issued | 2011-09 | |
dc.identifier.issn | 0021-9673 | |
dc.identifier.uri | http://hdl.handle.net/10234/50919 | |
dc.description.abstract | Countercurrent chromatography (CCC) is a liquid chromatography technique in which the stationary phase is also a liquid. The main chemical process involved in solute separation is partitioning between the two immiscible liquid phases: the mobile phase and the support-free liquid stationary phase. The octanol–water partition coefficients (Po/w) is the accepted parameter measuring the hydrophobicity of molecules. It is considered to estimate active principle partitioning over a biomembrane. It was related to the substance biological activity. CCC is able to work with an octanol stationary phase and an aqueous mobile phase. In this configuration, CCC is a useful and easy alternative to measure directly the Po/w of the molecules compared to other methods including the classical and tedious shake-flask method. Three ketones are used as model compounds to illustrate the CCC protocol of Po/w measurement. The focus of this work is put on ionisable molecules whose apparent Po/w is completely changed by ionization. β-Blockers, diuretics and sulfonamides are compound classes that were studied. Some of the experimentally determined Po/w coefficients of the molecular forms disagreed with calculated and experimental values available in the literature. The Po/w coefficients of the ionic forms and the acidity constants were also calculated using a theoretical model. Relationships between biological properties and hydrophobicity are also discussed. | ca_CA |
dc.format.extent | 9 p. | ca_CA |
dc.format.mimetype | application/pdf | ca_CA |
dc.language.iso | eng | ca_CA |
dc.publisher | © 2011 Elsevier | ca_CA |
dc.relation.isPartOf | Journal of Chromatography A (September 2011), vol. 1218, no. 36, 6044–6052 | ca_CA |
dc.rights.uri | http://rightsstatements.org/vocab/CNE/1.0/ | * |
dc.subject | Countercurrent chromatography | ca_CA |
dc.subject | Octanol–water partition coefficients | ca_CA |
dc.subject | Ionisable compounds | ca_CA |
dc.subject | Hydrophobicity | ca_CA |
dc.title | Hydrophobicity of ionisable compounds studied by countercurrent chromatography. | ca_CA |
dc.type | info:eu-repo/semantics/article | ca_CA |
dc.identifier.doi | http://dx.doi.org/10.1016/j.chroma.2011.01.015 | |
dc.rights.accessRights | info:eu-repo/semantics/restrictedAccess | ca_CA |
dc.relation.publisherVersion | http://www.sciencedirect.com/science/article/pii/S0021967311000458 | ca_CA |
dc.type.version | info:eu-repo/semantics/publishedVersion |
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