• español
  • English
  • français
  • Deutsch
  • português (Brasil)
  • italiano
    • español
    • English
    • français
    • Deutsch
    • português (Brasil)
    • italiano
    • español
    • English
    • français
    • Deutsch
    • português (Brasil)
    • italiano
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Parcourir

    Tout UVaDOCCommunautésPar date de publicationAuteursSujetsTitres

    Mon compte

    Ouvrir une session

    Statistiques

    Statistiques d'usage de visualisation

    Compartir

    Voir le document 
    •   Accueil de UVaDOC
    • PUBLICATIONS SCIENTIFIQUES
    • Departamentos
    • Dpto. Física Aplicada
    • DEP31 - Artículos de revista
    • Voir le document
    •   Accueil de UVaDOC
    • PUBLICATIONS SCIENTIFIQUES
    • Departamentos
    • Dpto. Física Aplicada
    • DEP31 - Artículos de revista
    • Voir le document
    • español
    • English
    • français
    • Deutsch
    • português (Brasil)
    • italiano

    Exportar

    RISMendeleyRefworksZotero
    • edm
    • marc
    • xoai
    • qdc
    • ore
    • ese
    • dim
    • uketd_dc
    • oai_dc
    • etdms
    • rdf
    • mods
    • mets
    • didl
    • premis

    Citas

    Por favor, use este identificador para citar o enlazar este ítem:https://uvadoc.uva.es/handle/10324/78195

    Título
    N-Alkanoate + N-Alkane Mixtures: Folding of Hydrocarbon Chains of N-Alkanoates
    Autor
    González López, Juan Antonio MarianoAutoridad UVA Orcid
    Hevia de los Mozos, Luis FernandoAutoridad UVA Orcid
    Sanz, Luis Felipe
    Lozano Martín, DanielAutoridad UVA Orcid
    García de la Fuente, Isaías LaudelinoAutoridad UVA Orcid
    Cobos Hernández, José CarlosAutoridad UVA Orcid
    Año del Documento
    2025-08-14
    Editorial
    Springer Nature
    Descripción
    Producción Científica
    Documento Fuente
    J. Solution Chem. 54 (2025) 1403-1425
    Résumé
    The mixtures CH$_3$(CH$_2$)$_{u-1}$COO(CH$_2$)$_{v-1}$CH$_3$ ($u=5-13$, $v=1,2$; $u=1,2,3$, $v=3,4$; $u=1,2,4$, $v=5$) + n-alkane have been investigated using experimental data (viscosity and excess molar functions: enthalpy, $H_{\text{m}}^{\text{E}}$, volume, $V_{\text{m}}^{\text{E}}$, isobaric heat capacity, and isochoric internal energy, $U_{V\text{m}}^{\text{E}}$) and models (Flory, Grunberg-Nissan, Bloomfield-Dewan). They are characterized by weak orientational effects. Large structural effects are found in some systems, like those containing pentane. Some considerations from standard enthalpies of vaporization, cohesive energy densities and $V_{\text{m}}^{\text{E}}$ of heptane mixtures reveal the existence of structural changes in longer n-alkanoates, which lead to stronger interactions between them. The observed decrease of $H_{\text{m}}^{\text{E}}$ for systems with a given n-alkane seems to be more related to the steric hindrance of the COO group than to interactional effects. The $U_{V\text{m}}^{\text{E}}(n)$ function ($n=$ number of C atoms in the n-alkane) shows a minimum for systems with esters with ($u\geq4$, $v=1$); ($u\geq7$, $v=2$), or ($u\geq 1$, $v=4,5$). A similar dependence was found for n-alkane mixtures involving cyclic molecules (cyclohexane, benzene). This result suggests that certain n-alkanoates, in an alkane medium, can form quasi-cyclic structures. Viscosities are well described by means of free volume effects only. For systems with butyl ethanoate or methyl decanoate, the variation of $\Delta \eta (n)$ (deviation of dynamic viscosity) is consistent with that of $U_{V\text{m}}^{\text{E}}(n)$, which supports the existence of cyclic structures in these esters. The Flory model provides poor results on $H_{\text{m}}^{\text{E}}$ for systems with large structural effects. Results improve when the model is applied to $U_{V\text{m}}^{\text{E}}(n)$ data.
    Materias (normalizadas)
    Termodinámica
    Materias Unesco
    2213 Termodinámica
    Palabras Clave
    n-alkanoates
    n-alkanes
    molar excess isochoric internal energy
    thermophysical models
    dispersive interactions
    structural effects
    folding
    ISSN
    0095-9782
    Revisión por pares
    SI
    DOI
    10.1007/s10953-025-01479-8
    Patrocinador
    Proyecto PID2022-137104NA-I00”, financiado por MICIN/AEI/10.13039/501100011033/ y por FEDER, UE.
    Version del Editor
    https://doi.org/10.1007/s10953-025-01479-8
    Idioma
    spa
    URI
    https://uvadoc.uva.es/handle/10324/78195
    Tipo de versión
    info:eu-repo/semantics/submittedVersion
    Derechos
    openAccess
    Aparece en las colecciones
    • DEP31 - Artículos de revista [170]
    Afficher la notice complète
    Fichier(s) constituant ce document
    Nombre:
    Gonzalez J.Sol.Chem._54_2025_1403-1425_preprint.pdf
    Tamaño:
    1.738Mo
    Formato:
    Adobe PDF
    Descripción:
    Artículo y material suplementario
    Thumbnail
    Voir/Ouvrir
    Attribution-NonCommercial-NoDerivatives 4.0 InternacionalExcepté là où spécifié autrement, la license de ce document est décrite en tant que Attribution-NonCommercial-NoDerivatives 4.0 Internacional

    Universidad de Valladolid

    Powered by MIT's. DSpace software, Version 5.10