Solvophobic effect of 1-alkyl-3-methylimidazolium chloride on the thermodynamic of complexation between β-cyclodextrin and dodecylpyridinium cation.

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Autor(es): dc.creatorPatino Agudelo, Alvaro Javier-
Autor(es): dc.creatorCoelho, Yara Luiza-
Autor(es): dc.creatorFerreira, Guilherme Max Dias-
Autor(es): dc.creatorFerreira, Gabriel Max Dias-
Autor(es): dc.creatorHudson, Eliara Acipreste-
Autor(es): dc.creatorPires, Ana Clarissa dos Santos-
Autor(es): dc.creatorSilva, Luis Henrique Mendes da-
Data de aceite: dc.date.accessioned2025-08-21T15:59:06Z-
Data de disponibilização: dc.date.available2025-08-21T15:59:06Z-
Data de envio: dc.date.issued2020-06-10-
Data de envio: dc.date.issued2020-06-10-
Data de envio: dc.date.issued2019-
Fonte completa do material: dc.identifierhttp://www.repositorio.ufop.br/handle/123456789/12326-
Fonte completa do material: dc.identifierhttps://www.sciencedirect.com/science/article/pii/S0927775719308386-
Fonte completa do material: dc.identifierhttps://doi.org/10.1016/j.colsurfa.2019.123850-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/capes/1029266-
Descrição: dc.descriptionPreferential 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.-
Formato: dc.formatapplication/pdf-
Idioma: dc.languageen-
Direitos: dc.rightsrestrito-
Palavras-chave: dc.subjectInclusion complex-
Palavras-chave: dc.subjectIonic liquids-
Palavras-chave: dc.subjectIsothermal titration calorimetry-
Palavras-chave: dc.subject1-Dodecylpyridinium chloride-
Título: dc.titleSolvophobic effect of 1-alkyl-3-methylimidazolium chloride on the thermodynamic of complexation between β-cyclodextrin and dodecylpyridinium cation.-
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