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dc.contributor.authorRomanini, Michela
dc.contributor.authorBarrio Casado, María del
dc.contributor.authorMacovez, Roberto
dc.contributor.authorRuíz Martín, María Dolores
dc.contributor.authorCapaccioli, Simone
dc.contributor.authorTamarit Mur, José Luis
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament de Física
dc.identifier.citationRomanini, M., Del Barrio, M., Macovez, R., Ruiz, M., Capaccioli, S., Tamarit, J. L. Thermodynamic scaling of the dynamics of a strongly hydrogen-bonded glass-former. "Scientific reports", 1 Desembre 2017, vol. 7, núm. 1346, p. 1-11.
dc.description.abstractWe probe the temperature- and pressure-dependent specific volume (v) and dipolar dynamics of the amorphous phase (in both the supercooled liquid and glass states) of the ternidazole drug (TDZ). Three molecular dynamic processes are identified by means of dielectric spectroscopy, namely the a relaxation, which vitrifies at the glass transition, a Johari-Goldstein ßJG relaxation, and an intramolecular process associated with the relaxation motion of the propanol chain of the TDZ molecule. The lineshapes of dielectric spectra characterized by the same relaxation time (isochronal spectra) are virtually identical, within the studied temperature and pressure ranges, so that the time-temperature-pressure superposition principle holds for TDZ. The a and ßJG relaxation times fulfil the density-dependent thermodynamic scaling: master curves result when they are plotted against the thermodynamic quantity Tv¿, with thermodynamic exponent ¿ approximately equal to 2. These results show that the dynamics of TDZ, a system characterized by strong hydrogen bonding, is characterized by an isomorphism similar to that of van-der-Waals systems. The low value of ¿ can be rationalized in terms of the relatively weak density-dependence of the dynamics of hydrogen-bonded systems.
dc.format.extent11 p.
dc.publisherMacmillan Publishers
dc.rightsAttribution 3.0 Spain
dc.subjectÀrees temàtiques de la UPC::Física
dc.titleThermodynamic scaling of the dynamics of a strongly hydrogen-bonded glass-former
dc.subject.lemacTermodinàmica -- Aplicacions
dc.contributor.groupUniversitat Politècnica de Catalunya. GCM - Grup de Caracterització de Materials
dc.rights.accessOpen Access
dc.description.versionPostprint (published version)
upcommons.citation.authorRomanini, M., Del Barrio, M., Macovez, R., Ruiz, M., Capaccioli, S., Tamarit, J. Ll.
upcommons.citation.publicationNameScientific reports
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