Dynamic heterogeneity in the glass-like monoclinic phases of CBrnCl4−n, n = 0,1,2

Autores
Zuriaga, Mariano Jose; Perez, Silvina Claudia; Pardo, L. C.; Tamarit, J. Ll.
Año de publicación
2012
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Glassy dynamics of rigid molecules is still a matter of controversy: the physics behind the relaxation process at time scales faster than that ruled by the viscosity, the so called Johari-Goldstein process, is not known. In this work we unravel the mechanism of such a process by using a simple molecular model in which the centers of mass of the molecules are forming an ordered lattice, and molecular reorientation is performed by jumps between equilibrium orientations. We have studied the dynamics of simple quasi-tetrahedral molecules CBrnCl4-n, n= 0, 1, 2 in their monoclinic phases by means of dielectric spectroscopy and nuclear quadrupole resonance: the first technique allows to measure in a broad time scale but it is insensitive to molecular particularities while the second has a restricted time window but senses the movement of each chlorine atom separately. The dynamic picture emerging from these techniques is that the secondary relaxation process is related to the different molecular surroundings around each non-equivalent atom of the molecule. Dynamical heterogeneities seem thus to be the cause of the secondary relaxation in this simple models of glass.
Fil: Zuriaga, Mariano Jose. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Física Enrique Gaviola. Universidad Nacional de Córdoba. Instituto de Física Enrique Gaviola; Argentina. Universidad Nacional de Córdoba. Facultad de Matemática, Astronomía y Física; Argentina
Fil: Perez, Silvina Claudia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Física Enrique Gaviola. Universidad Nacional de Córdoba. Instituto de Física Enrique Gaviola; Argentina. Universidad Nacional de Córdoba. Facultad de Matemática, Astronomía y Física; Argentina
Fil: Pardo, L. C.. Universidad Politécnica de Catalunya. Departament de Física Enginyeria; España
Fil: Tamarit, J. Ll.. Universidad Politécnica de Catalunya. Departament de Física Enginyeria; España
Materia
Dynamic heterogeneity
Glassy dynamics
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/268294
Acceder
id CONICETDig_8535b5f08366c6cc995297800fe733f8
oai_identifier_str oai:ri.conicet.gov.ar:11336/268294
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Dynamic heterogeneity in the glass-like monoclinic phases of CBrnCl4−n, n = 0,1,2Zuriaga, Mariano JosePerez, Silvina ClaudiaPardo, L. C.Tamarit, J. Ll.Dynamic heterogeneityGlassy dynamicshttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1Glassy dynamics of rigid molecules is still a matter of controversy: the physics behind the relaxation process at time scales faster than that ruled by the viscosity, the so called Johari-Goldstein process, is not known. In this work we unravel the mechanism of such a process by using a simple molecular model in which the centers of mass of the molecules are forming an ordered lattice, and molecular reorientation is performed by jumps between equilibrium orientations. We have studied the dynamics of simple quasi-tetrahedral molecules CBrnCl4-n, n= 0, 1, 2 in their monoclinic phases by means of dielectric spectroscopy and nuclear quadrupole resonance: the first technique allows to measure in a broad time scale but it is insensitive to molecular particularities while the second has a restricted time window but senses the movement of each chlorine atom separately. The dynamic picture emerging from these techniques is that the secondary relaxation process is related to the different molecular surroundings around each non-equivalent atom of the molecule. Dynamical heterogeneities seem thus to be the cause of the secondary relaxation in this simple models of glass.Fil: Zuriaga, Mariano Jose. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Física Enrique Gaviola. Universidad Nacional de Córdoba. Instituto de Física Enrique Gaviola; Argentina. Universidad Nacional de Córdoba. Facultad de Matemática, Astronomía y Física; ArgentinaFil: Perez, Silvina Claudia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Física Enrique Gaviola. Universidad Nacional de Córdoba. Instituto de Física Enrique Gaviola; Argentina. Universidad Nacional de Córdoba. Facultad de Matemática, Astronomía y Física; ArgentinaFil: Pardo, L. C.. Universidad Politécnica de Catalunya. Departament de Física Enginyeria; EspañaFil: Tamarit, J. Ll.. Universidad Politécnica de Catalunya. Departament de Física Enginyeria; EspañaAmerican Institute of Physics2012-08info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/268294Zuriaga, Mariano Jose; Perez, Silvina Claudia; Pardo, L. C.; Tamarit, J. Ll.; Dynamic heterogeneity in the glass-like monoclinic phases of CBrnCl4−n, n = 0,1,2; American Institute of Physics; Journal of Chemical Physics; 137; 5; 8-2012; 545061-5450690021-9606CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1063/1.4739531info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:18:09Zoai:ri.conicet.gov.ar:11336/268294instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-29 10:18:09.489CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Dynamic heterogeneity in the glass-like monoclinic phases of CBrnCl4−n, n = 0,1,2
title Dynamic heterogeneity in the glass-like monoclinic phases of CBrnCl4−n, n = 0,1,2
spellingShingle Dynamic heterogeneity in the glass-like monoclinic phases of CBrnCl4−n, n = 0,1,2
Zuriaga, Mariano Jose
Dynamic heterogeneity
Glassy dynamics
title_short Dynamic heterogeneity in the glass-like monoclinic phases of CBrnCl4−n, n = 0,1,2
title_full Dynamic heterogeneity in the glass-like monoclinic phases of CBrnCl4−n, n = 0,1,2
title_fullStr Dynamic heterogeneity in the glass-like monoclinic phases of CBrnCl4−n, n = 0,1,2
title_full_unstemmed Dynamic heterogeneity in the glass-like monoclinic phases of CBrnCl4−n, n = 0,1,2
title_sort Dynamic heterogeneity in the glass-like monoclinic phases of CBrnCl4−n, n = 0,1,2
dc.creator.none.fl_str_mv Zuriaga, Mariano Jose
Perez, Silvina Claudia
Pardo, L. C.
Tamarit, J. Ll.
author Zuriaga, Mariano Jose
author_facet Zuriaga, Mariano Jose
Perez, Silvina Claudia
Pardo, L. C.
Tamarit, J. Ll.
author_role author
author2 Perez, Silvina Claudia
Pardo, L. C.
Tamarit, J. Ll.
author2_role author
author
author
dc.subject.none.fl_str_mv Dynamic heterogeneity
Glassy dynamics
topic Dynamic heterogeneity
Glassy dynamics
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Glassy dynamics of rigid molecules is still a matter of controversy: the physics behind the relaxation process at time scales faster than that ruled by the viscosity, the so called Johari-Goldstein process, is not known. In this work we unravel the mechanism of such a process by using a simple molecular model in which the centers of mass of the molecules are forming an ordered lattice, and molecular reorientation is performed by jumps between equilibrium orientations. We have studied the dynamics of simple quasi-tetrahedral molecules CBrnCl4-n, n= 0, 1, 2 in their monoclinic phases by means of dielectric spectroscopy and nuclear quadrupole resonance: the first technique allows to measure in a broad time scale but it is insensitive to molecular particularities while the second has a restricted time window but senses the movement of each chlorine atom separately. The dynamic picture emerging from these techniques is that the secondary relaxation process is related to the different molecular surroundings around each non-equivalent atom of the molecule. Dynamical heterogeneities seem thus to be the cause of the secondary relaxation in this simple models of glass.
Fil: Zuriaga, Mariano Jose. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Física Enrique Gaviola. Universidad Nacional de Córdoba. Instituto de Física Enrique Gaviola; Argentina. Universidad Nacional de Córdoba. Facultad de Matemática, Astronomía y Física; Argentina
Fil: Perez, Silvina Claudia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Física Enrique Gaviola. Universidad Nacional de Córdoba. Instituto de Física Enrique Gaviola; Argentina. Universidad Nacional de Córdoba. Facultad de Matemática, Astronomía y Física; Argentina
Fil: Pardo, L. C.. Universidad Politécnica de Catalunya. Departament de Física Enginyeria; España
Fil: Tamarit, J. Ll.. Universidad Politécnica de Catalunya. Departament de Física Enginyeria; España
description Glassy dynamics of rigid molecules is still a matter of controversy: the physics behind the relaxation process at time scales faster than that ruled by the viscosity, the so called Johari-Goldstein process, is not known. In this work we unravel the mechanism of such a process by using a simple molecular model in which the centers of mass of the molecules are forming an ordered lattice, and molecular reorientation is performed by jumps between equilibrium orientations. We have studied the dynamics of simple quasi-tetrahedral molecules CBrnCl4-n, n= 0, 1, 2 in their monoclinic phases by means of dielectric spectroscopy and nuclear quadrupole resonance: the first technique allows to measure in a broad time scale but it is insensitive to molecular particularities while the second has a restricted time window but senses the movement of each chlorine atom separately. The dynamic picture emerging from these techniques is that the secondary relaxation process is related to the different molecular surroundings around each non-equivalent atom of the molecule. Dynamical heterogeneities seem thus to be the cause of the secondary relaxation in this simple models of glass.
publishDate 2012
dc.date.none.fl_str_mv 2012-08
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/268294
Zuriaga, Mariano Jose; Perez, Silvina Claudia; Pardo, L. C.; Tamarit, J. Ll.; Dynamic heterogeneity in the glass-like monoclinic phases of CBrnCl4−n, n = 0,1,2; American Institute of Physics; Journal of Chemical Physics; 137; 5; 8-2012; 545061-545069
0021-9606
CONICET Digital
CONICET
url http://hdl.handle.net/11336/268294
identifier_str_mv Zuriaga, Mariano Jose; Perez, Silvina Claudia; Pardo, L. C.; Tamarit, J. Ll.; Dynamic heterogeneity in the glass-like monoclinic phases of CBrnCl4−n, n = 0,1,2; American Institute of Physics; Journal of Chemical Physics; 137; 5; 8-2012; 545061-545069
0021-9606
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1063/1.4739531
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv American Institute of Physics
publisher.none.fl_str_mv American Institute of Physics
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
_version_ 1844614140785590272
score 13.070432

Publicaciones similares