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Thermodynamic scaling of the dynamics of a strongly hydrogen-bonded glass-former
dc.contributor.author | Romanini, Michela |
dc.contributor.author | Barrio Casado, María del |
dc.contributor.author | Macovez, Roberto |
dc.contributor.author | Ruíz Martín, María Dolores |
dc.contributor.author | Capaccioli, Simon |
dc.contributor.author | Tamarit Mur, José Luis |
dc.contributor.other | Universitat Politècnica de Catalunya. Departament de Física |
dc.date.accessioned | 2017-05-19T13:57:59Z |
dc.date.available | 2017-05-19T13:57:59Z |
dc.date.issued | 2017-12-01 |
dc.identifier.citation | Romanini, 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.identifier.issn | 2045-2322 |
dc.identifier.uri | http://hdl.handle.net/2117/104658 |
dc.description.abstract | We 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.extent | 11 p. |
dc.language.iso | eng |
dc.publisher | Macmillan Publishers |
dc.rights | Attribution 3.0 Spain |
dc.rights.uri | http://creativecommons.org/licenses/by/3.0/es/ |
dc.subject | Àrees temàtiques de la UPC::Física |
dc.subject.lcsh | Thermodynamics |
dc.subject.lcsh | Dynamics |
dc.title | Thermodynamic scaling of the dynamics of a strongly hydrogen-bonded glass-former |
dc.type | Article |
dc.subject.lemac | Termodinàmica -- Aplicacions |
dc.subject.lemac | Dinàmica |
dc.contributor.group | Universitat Politècnica de Catalunya. GCM - Grup de Caracterització de Materials |
dc.identifier.doi | 10.1038/s41598-017-01464-2 |
dc.relation.publisherversion | https://www.nature.com/articles/s41598-017-01464-2 |
dc.rights.access | Open Access |
local.identifier.drac | 20568898 |
dc.description.version | Postprint (published version) |
local.citation.author | Romanini, M.; Del Barrio, M.; Macovez, R.; Ruiz, M.; Capaccioli, S.; Tamarit, J. Ll. |
local.citation.publicationName | Scientific reports |
local.citation.volume | 7 |
local.citation.number | 1346 |
local.citation.startingPage | 1 |
local.citation.endingPage | 11 |
dc.identifier.pmid | 28465573 |
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