Solvophobic effect of 1-alkyl-3-methylimidazolium chloride on the thermodynamic of complexation between β-cyclodextrin and dodecylpyridinium cation.
| dc.contributor.author | Patino Agudelo, Alvaro Javier | |
| dc.contributor.author | Coelho, Yara Luiza | |
| dc.contributor.author | Ferreira, Guilherme Max Dias | |
| dc.contributor.author | Ferreira, Gabriel Max Dias | |
| dc.contributor.author | Hudson, Eliara Acipreste | |
| dc.contributor.author | Pires, Ana Clarissa dos Santos | |
| dc.contributor.author | Silva, Luis Henrique Mendes da | |
| dc.date.accessioned | 2020-06-10T13:26:08Z | |
| dc.date.available | 2020-06-10T13:26:08Z | |
| dc.date.issued | 2019 | |
| dc.description.abstract | Preferential solvation participate in various supramolecular self-assembly processes, whose thermodynamic properties can be modulated by the addition of ionic liquids (ILs). However, the effects of these liquids on the thermodynamics of the host-guest complexation process remain unexplored. In this study, the thermodynamic properties of the complexation between 1-dodecylpyridinium cations (C12Py+) and β-cyclodextrin (βCD) species in aqueous solutions with different concentrations of 1-alkyl-3-methylimidazolium halides (CnmimX) were investigated by isothermal titration calorimetry. In water, C12Py+ and βCD form a 1:1 inclusion complex, which is enthalpically ( −9.2 ± 0.1 kJ mol−1) and entropically ( 16.1 ± 0.2 kJ mol−1) favorable. However, in IL aqueous solutions, all the βCD―C12Py+ thermodynamic parameters of the complexation change and this IL effect is dependent on the carbon chain length of Cnmim+ cations. ILs with shorter alkyl chains (Cnmim+, n ≤ 4) decreases the system entropy, while ILs with longer alkyl chains (Cnmim+, n ≥ 6) reduce the enthalpy values. These effects are attributed to i) preferential solvation of surfactant tails by ILs; ii) ability of the ILs to modify the 3D water structure and iii) inclusion of IL molecules into the inner cavities of βCD. | pt_BR |
| dc.identifier.citation | AGUDELO, A. J. P. et al. Solvophobic effect of 1-alkyl-3-methylimidazolium chloride on the thermodynamic of complexation between β-cyclodextrin and dodecylpyridinium cation. Colloids and Surfaces A-Physicochemical and Engineering Aspects, v. 582, p. 123850, dez. 2019. Disponível em: <https://www.sciencedirect.com/science/article/pii/S0927775719308386>. Acesso em: 10 fev. 2020. | pt_BR |
| dc.identifier.doi | https://doi.org/10.1016/j.colsurfa.2019.123850 | pt_BR |
| dc.identifier.issn | 0927-7757 | |
| dc.identifier.uri | http://www.repositorio.ufop.br/handle/123456789/12326 | |
| dc.identifier.uri2 | https://www.sciencedirect.com/science/article/pii/S0927775719308386 | pt_BR |
| dc.language.iso | en_US | pt_BR |
| dc.rights | restrito | pt_BR |
| dc.subject | Inclusion complex | pt_BR |
| dc.subject | Ionic liquids | pt_BR |
| dc.subject | Isothermal titration calorimetry | pt_BR |
| dc.subject | 1-Dodecylpyridinium chloride | pt_BR |
| dc.title | Solvophobic effect of 1-alkyl-3-methylimidazolium chloride on the thermodynamic of complexation between β-cyclodextrin and dodecylpyridinium cation. | pt_BR |
| dc.type | Artigo publicado em periodico | pt_BR |