Proton field-cycling nucler magnetic resonance relaxometry in the smectic A mesophase of thermotropic cyanobiphenyls: Effects of sonication

Autores
Bonetto, Fernando Jose; Anoardo, Esteban
Año de publicación
2004
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Field-cycling nuclear magnetic resonance (NMR) relaxometry was used to study the spin-lattice relaxation dispersion of selected standard smectic A liquid crystals at different temperatures. Relaxation features at both, in presence and absence of a monochromatic ultrasonic field were considered. We show that the laboratory-frame spin-lattice relaxation time is mainly governed by traslational diffusion. Order director fluctuations (ODF) are less important while rotational difussion seems to be only relevant near the clearing point. We show that sonication enhances the ODF contribution in the SmAmesophase, thus enabling the evaluation of different features associated with this mechanism.
Fil: Bonetto, Fernando Jose. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Desarrollo Tecnológico para la Industria Química. Universidad Nacional del Litoral. Instituto de Desarrollo Tecnológico para la Industria Química; Argentina. Universidad Nacional de Córdoba; Argentina
Fil: Anoardo, Esteban. Universidad Nacional de Córdoba; Argentina
Materia
Smectic liquid crystals
Effects of sonication
Field cycling relaxomery
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:11336/27254
Acceder
id CONICETDig_1acfda4edbd69687aca3b16665cc6e9f
oai_identifier_str oai:ri.conicet.gov.ar:11336/27254
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Proton field-cycling nucler magnetic resonance relaxometry in the smectic A mesophase of thermotropic cyanobiphenyls: Effects of sonicationBonetto, Fernando JoseAnoardo, EstebanSmectic liquid crystalsEffects of sonicationField cycling relaxomeryhttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1Field-cycling nuclear magnetic resonance (NMR) relaxometry was used to study the spin-lattice relaxation dispersion of selected standard smectic A liquid crystals at different temperatures. Relaxation features at both, in presence and absence of a monochromatic ultrasonic field were considered. We show that the laboratory-frame spin-lattice relaxation time is mainly governed by traslational diffusion. Order director fluctuations (ODF) are less important while rotational difussion seems to be only relevant near the clearing point. We show that sonication enhances the ODF contribution in the SmAmesophase, thus enabling the evaluation of different features associated with this mechanism.Fil: Bonetto, Fernando Jose. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Desarrollo Tecnológico para la Industria Química. Universidad Nacional del Litoral. Instituto de Desarrollo Tecnológico para la Industria Química; Argentina. Universidad Nacional de Córdoba; ArgentinaFil: Anoardo, Esteban. Universidad Nacional de Córdoba; ArgentinaAmerican Institute of Physics2004-07info: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/11336/27254Bonetto, Fernando Jose; Anoardo, Esteban; Proton field-cycling nucler magnetic resonance relaxometry in the smectic A mesophase of thermotropic cyanobiphenyls: Effects of sonication; American Institute of Physics; Journal of Chemical Physics; 121; 1; 7-2004; 554-5610021-9606CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1063/1.1740751info:eu-repo/semantics/altIdentifier/url/http://aip.scitation.org/doi/abs/10.1063/1.1740751info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-15T15:29:13Zoai:ri.conicet.gov.ar:11336/27254instacron: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:34982025-10-15 15:29:14.24CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Proton field-cycling nucler magnetic resonance relaxometry in the smectic A mesophase of thermotropic cyanobiphenyls: Effects of sonication
title Proton field-cycling nucler magnetic resonance relaxometry in the smectic A mesophase of thermotropic cyanobiphenyls: Effects of sonication
spellingShingle Proton field-cycling nucler magnetic resonance relaxometry in the smectic A mesophase of thermotropic cyanobiphenyls: Effects of sonication
Bonetto, Fernando Jose
Smectic liquid crystals
Effects of sonication
Field cycling relaxomery
title_short Proton field-cycling nucler magnetic resonance relaxometry in the smectic A mesophase of thermotropic cyanobiphenyls: Effects of sonication
title_full Proton field-cycling nucler magnetic resonance relaxometry in the smectic A mesophase of thermotropic cyanobiphenyls: Effects of sonication
title_fullStr Proton field-cycling nucler magnetic resonance relaxometry in the smectic A mesophase of thermotropic cyanobiphenyls: Effects of sonication
title_full_unstemmed Proton field-cycling nucler magnetic resonance relaxometry in the smectic A mesophase of thermotropic cyanobiphenyls: Effects of sonication
title_sort Proton field-cycling nucler magnetic resonance relaxometry in the smectic A mesophase of thermotropic cyanobiphenyls: Effects of sonication
dc.creator.none.fl_str_mv Bonetto, Fernando Jose
Anoardo, Esteban
author Bonetto, Fernando Jose
author_facet Bonetto, Fernando Jose
Anoardo, Esteban
author_role author
author2 Anoardo, Esteban
author2_role author
dc.subject.none.fl_str_mv Smectic liquid crystals
Effects of sonication
Field cycling relaxomery
topic Smectic liquid crystals
Effects of sonication
Field cycling relaxomery
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Field-cycling nuclear magnetic resonance (NMR) relaxometry was used to study the spin-lattice relaxation dispersion of selected standard smectic A liquid crystals at different temperatures. Relaxation features at both, in presence and absence of a monochromatic ultrasonic field were considered. We show that the laboratory-frame spin-lattice relaxation time is mainly governed by traslational diffusion. Order director fluctuations (ODF) are less important while rotational difussion seems to be only relevant near the clearing point. We show that sonication enhances the ODF contribution in the SmAmesophase, thus enabling the evaluation of different features associated with this mechanism.
Fil: Bonetto, Fernando Jose. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Desarrollo Tecnológico para la Industria Química. Universidad Nacional del Litoral. Instituto de Desarrollo Tecnológico para la Industria Química; Argentina. Universidad Nacional de Córdoba; Argentina
Fil: Anoardo, Esteban. Universidad Nacional de Córdoba; Argentina
description Field-cycling nuclear magnetic resonance (NMR) relaxometry was used to study the spin-lattice relaxation dispersion of selected standard smectic A liquid crystals at different temperatures. Relaxation features at both, in presence and absence of a monochromatic ultrasonic field were considered. We show that the laboratory-frame spin-lattice relaxation time is mainly governed by traslational diffusion. Order director fluctuations (ODF) are less important while rotational difussion seems to be only relevant near the clearing point. We show that sonication enhances the ODF contribution in the SmAmesophase, thus enabling the evaluation of different features associated with this mechanism.
publishDate 2004
dc.date.none.fl_str_mv 2004-07
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/11336/27254
Bonetto, Fernando Jose; Anoardo, Esteban; Proton field-cycling nucler magnetic resonance relaxometry in the smectic A mesophase of thermotropic cyanobiphenyls: Effects of sonication; American Institute of Physics; Journal of Chemical Physics; 121; 1; 7-2004; 554-561
0021-9606
CONICET Digital
CONICET
url http://hdl.handle.net/11336/27254
identifier_str_mv Bonetto, Fernando Jose; Anoardo, Esteban; Proton field-cycling nucler magnetic resonance relaxometry in the smectic A mesophase of thermotropic cyanobiphenyls: Effects of sonication; American Institute of Physics; Journal of Chemical Physics; 121; 1; 7-2004; 554-561
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/10.1063/1.1740751
info:eu-repo/semantics/altIdentifier/url/http://aip.scitation.org/doi/abs/10.1063/1.1740751
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_ 1846083432126349312
score 13.22299

Publicaciones similares