Synthesis and Gelling Abilities of Polyfunctional Cyclohexane-1,2-dicarboxylic Acid Bisamides: Influence of the Hydroxyl Groups
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Título: | Synthesis and Gelling Abilities of Polyfunctional Cyclohexane-1,2-dicarboxylic Acid Bisamides: Influence of the Hydroxyl Groups |
Autor/a: | Pi-Boleda, Bernat Campos Torrado, María Sans, Marta Basavilbaso González, Antonio Illa, Ona Branchadell, Vicenç Estévez Cabanas, Juan Carlos Ortuño, Rosa M. |
Centro/Departamento: | Universidade de Santiago de Compostela. Centro de Investigación en Química Biolóxica e Materiais Moleculares Universidade de Santiago de Compostela. Departamento de Química Orgánica |
Palabras chave: | Polyfunctional cycloalkane bisamides | Organogelator | Self-assembly | Chirality | Hydrogen bonds | |
Data: | 2019 |
Editor: | MDPI |
Cita bibliográfica: | Pi-Boleda, B.; Campos, M.; Sans, M.; Basavilbaso, A.; Illa, O.; Branchadell, V.; Estévez, J.C.; Ortuño, R.M. Synthesis and Gelling Abilities of Polyfunctional Cyclohexane-1,2-dicarboxylic Acid Bisamides: Influence of the Hydroxyl Groups. Molecules 2019, 24, 352 |
Resumo: | New enantiomerically pure C16-alkyl diamides derived from trihydroxy cyclohexane-1,2-dicarboxylic acid have been synthesized from (−)-shikimic acid. The hydroxyl groups in these compounds are free or, alternatively, they present full or partial protection. Their gelling abilities towards several solvents have been tested and rationalized by means of the combined use of Hansen solubility parameters, scanning electron microscopy (SEM), and circular dichroism (CD), as well as computational calculations. All the results allowed us to account for the capability of each type of organogelator to interact with different solvents and for the main mode of aggregation. Thus, compounds with fully protected hydroxyl groups are good organogelators for methanol and ethanol. In contrast, a related compound bearing three free hydroxyl groups is insoluble in water and polar solvents including alcohols but it is able to gelate some low-polarity solvents. This last behavior can be justified by strong hydrogen bonding between molecules of organogelator, which competes advantageously with polar solvent interactions. As an intermediate case, an organogelator with two free hydroxyl groups presents an ambivalent ability to gelate both apolar and polar solvents by means of two aggregation patterns. These involve hydrogen bonding interactions of the unprotected hydroxyl groups in apolar solvents and intermolecular interactions between amide groups in polar ones |
Versión do editor: | https://doi.org/10.3390/molecules24020352 |
URI: | http://hdl.handle.net/10347/21102 |
DOI: | 10.3390/molecules24020352 |
ISSN: | 1420-3049 |
Dereitos: | © 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/) |
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