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Hevia de los Mozos, Luis Fernando 98f8782b26b90602 500 0000-0002-5145-2854 González López, Juan Antonio Mariano 48f56dda7c294251 500 0000-0003-0624-8608 Cobos Huerga, Ana 031dd0450ae660b3 500 0000-0003-4933-1970 García de la Fuente, Isaías Laudelino 0424a961363a8a4a 500 0000-0001-8192-6443 Sanz del Soto, Luis Felipe 596ccd5f-c0d2-459f-84d1-16e27b10882f 500 2019-10-15T21:47:59Z 2019-10-15T21:47:59Z 2019 The Journal of Chemical Thermodynamics 141 (2020) 105937 0021-9614 http://uvadoc.uva.es/handle/10324/38602 10.1016/j.jct.2019.105937 Article number 105937 February 2020 Journal of Chemical Thermodynamics 141 Producción Científica Relative permittivities at 1 MHz, epsilon(r), at 0.1 MPa and (293.15–303.15) K and refractive indices, nD, at similar conditions have been measured for the alkan-1-ol (methanol, propan-1-ol, butan-1-ol, pentan-1-ol or heptan-1-ol) + N,N-diethylethanamine (TEA) systems. Positive values of the excess permittivities, epsilon(r)E, are encountered for the methanol system at high alcohol concentrations. The remaining mixtures are characterized by negative epsilon(r)E values over the whole composition range. At fi1 (volume fraction) = 0.5, epsilon(r)E changes in the order: methanol > propan-1-ol > butan-1-ol < pentan-1-ol < heptan-1-ol. Mixtures formed by alkan-1-ol and an isomeric amine, hexan-1-amine (HxA) or N-propylpropan-1-amine (DPA) or cyclohexylamine, behave similarly. This has been explained in terms of the lower and weaker self-association of longer alkan-1-ols. From the permittivity data, it is shown that: (i) (alkan-1-ol)-TEA interactions contribute positively to epsilon(r)E; (ii) TEA is an effective breaker of the network of the alkan-1-ols; (iii) structural effects, which are very important for the volumetric and calorimetric data of alkan-1-ol + TEA systems, are also relevant when evaluating dielectric data. This is confirmed by the comparison of epsilon(r)E measurements for alkan-1-ol + aliphatic amine mixtures; (iv) the aromaticity effect (i.e., the replacement of TEA by pyridine in systems with a given alkan-1-ol) leads to an increase of the mixture polarization. Calculations conducted in the framework of the Kirkwood-Fröhlich model are consistent with the previous statements. Consejería de Educación, Junta de Castilla y León: Project VA100G19 (Apoyo a GIR, BDNS: 425389) Ministerio de Educación, Cultura y Deporte (MECD): Grants FPU14/04104 and FPU15/05456 application/pdf eng Elsevier Ltd info:eu-repo/semantics/openAccess Termodinámica Alkan-1-ol N,N-diethylethanamine Permittivity Refractive index Kirkwood correlation factor 2213 Termodinámica 2210.21 Equilibrio de Fases 2210.30 Soluciones Thermodynamics of mixtures with strongly negative deviations from Raoult's law. XVII. Permittivities and refractive indices for alkan-1-ol + N,N-diethylethanamine systems at (293.15–303.15) K. Application of the Kirkwood-Fröhlich model info:eu-repo/semantics/article info:eu-repo/semantics/acceptedVersion https://www.sciencedirect.com/science/article/pii/S0021961419303209?via%3Dihub SI THUMBNAIL Hevia-JCT-141-2020-105937-AM.pdf.jpg Hevia-JCT-141-2020-105937-AM.pdf.jpg IM Thumbnail image/jpeg 1996 https://uvadoc.uva.es/bitstream/10324/38602/4/Hevia-JCT-141-2020-105937-AM.pdf.jpg 3c34bf1618b3634c34981983dbab392b MD5 4 J. Chem. Thermodyn. 141 (2020) 105937.pdf.jpg J. Chem. Thermodyn. 141 (2020) 105937.pdf.jpg IM Thumbnail image/jpeg 1996 https://uvadoc.uva.es/bitstream/10324/38602/5/J.%20Chem.%20Thermodyn.%20141%20%282020%29%20105937.pdf.jpg 3c34bf1618b3634c34981983dbab392b MD5 5 ORIGINAL J. Chem. Thermodyn. 141 (2020) 105937.pdf J. Chem. Thermodyn. 141 (2020) 105937.pdf Artículo (versión Pre-proofs que incorpora "Supplementary material" ) application/pdf 1250645 https://uvadoc.uva.es/bitstream/10324/38602/3/J.%20Chem.%20Thermodyn.%20141%20%282020%29%20105937.pdf ac25a1b7609633c1c94bea80f3355645 MD5 3 LICENSE license.txt license.txt text/plain 3926 https://uvadoc.uva.es/bitstream/10324/38602/2/license.txt 017313583e37a1e4d1253e1ef6c66c6c MD5 2 10324/38602 oai:uvadoc.uva.es:10324/38602 2025-03-26 20:10:03.902 UVaDOC repositorio@uva.es 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