Evidence for several dipolar quasi-invariants in liquid crystals

Autores
Bonin, Claudio Julio; González, C. E.; Segnorile, Hector Hugo; Zamar, Ricardo César
Año de publicación
2013
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
In a closed quantum system of N dipole coupled spins with magnetic quantum number I, there are (2I +1)N constants of motion, however, the possibility of observing such quasi-invariants (QIs) in solid-like spin systems in Nuclear Magnetic Resonance (NMR) is not a strictly exact prediction. The aim of this work is to provide experimental evidence of several QIs, in the proton NMR of small spin clusters, besides those already known Zeeman, and dipolar orders (strong and weak). We explore the spin states prepared with the Jeener-Broekaert pulse sequence by analyzing the timedomain signals yielded by this sequence as a function of the preparation times, in a variety of dipolar networks, solids and liquid crystals. We observe that the signals can be explained with two dipolar QIs only within a range of short preparation times. At longer times liquid crystal signals show an echo-like behaviour. We study their multiple quantum coherence content on a basis orthogonal to the z-basis and see that such states involve a significant number of correlated spins. Then we show that the NMR signals within the whole preparation time-scale can only be reconstructed by assuming the occurrence of multiple QIs which we experimentally isolate.
Fil: Bonin, Claudio Julio. Universidad Nacional de Córdoba. Facultad de Matemática, Astronomía y Física; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Santa Fe. Instituto de Desarrollo Tecnológico para la Industria Química (i); Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Santa Fe. Instituto de Física del Litoral; Argentina
Fil: González, C. E.. Universidad Nacional de Córdoba. Facultad de Matemática, Astronomía y Física; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Córdoba. Instituto de Física "Enrique Gaviola"; Argentina
Fil: Segnorile, Hector Hugo. Universidad Nacional de Córdoba. Facultad de Matemática, Astronomía y Física; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Córdoba. Instituto de Física "Enrique Gaviola"; Argentina
Fil: Zamar, Ricardo César. Universidad Nacional de Córdoba. Facultad de Matemática, Astronomía y Física; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Córdoba. Instituto de Física "Enrique Gaviola"; Argentina
Materia
Quasi invariants
NMR
Liquid crstals
Quasi equilibrium
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:11336/4419
Acceder
id CONICETDig_b7adbbcc158fefe266c3ce88bd9ec1ac
oai_identifier_str oai:ri.conicet.gov.ar:11336/4419
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Evidence for several dipolar quasi-invariants in liquid crystalsBonin, Claudio JulioGonzález, C. E.Segnorile, Hector HugoZamar, Ricardo CésarQuasi invariantsNMRLiquid crstalsQuasi equilibriumhttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1In a closed quantum system of N dipole coupled spins with magnetic quantum number I, there are (2I +1)N constants of motion, however, the possibility of observing such quasi-invariants (QIs) in solid-like spin systems in Nuclear Magnetic Resonance (NMR) is not a strictly exact prediction. The aim of this work is to provide experimental evidence of several QIs, in the proton NMR of small spin clusters, besides those already known Zeeman, and dipolar orders (strong and weak). We explore the spin states prepared with the Jeener-Broekaert pulse sequence by analyzing the timedomain signals yielded by this sequence as a function of the preparation times, in a variety of dipolar networks, solids and liquid crystals. We observe that the signals can be explained with two dipolar QIs only within a range of short preparation times. At longer times liquid crystal signals show an echo-like behaviour. We study their multiple quantum coherence content on a basis orthogonal to the z-basis and see that such states involve a significant number of correlated spins. Then we show that the NMR signals within the whole preparation time-scale can only be reconstructed by assuming the occurrence of multiple QIs which we experimentally isolate.Fil: Bonin, Claudio Julio. Universidad Nacional de Córdoba. Facultad de Matemática, Astronomía y Física; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Santa Fe. Instituto de Desarrollo Tecnológico para la Industria Química (i); Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Santa Fe. Instituto de Física del Litoral; ArgentinaFil: González, C. E.. Universidad Nacional de Córdoba. Facultad de Matemática, Astronomía y Física; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Córdoba. Instituto de Física "Enrique Gaviola"; ArgentinaFil: Segnorile, Hector Hugo. Universidad Nacional de Córdoba. Facultad de Matemática, Astronomía y Física; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Córdoba. Instituto de Física "Enrique Gaviola"; ArgentinaFil: Zamar, Ricardo César. Universidad Nacional de Córdoba. Facultad de Matemática, Astronomía y Física; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Córdoba. Instituto de Física "Enrique Gaviola"; ArgentinaAmerican Institute of Physics2013-10info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/4419Bonin, Claudio Julio; González, C. E.; Segnorile, Hector Hugo; Zamar, Ricardo César; Evidence for several dipolar quasi-invariants in liquid crystals; American Institute of Physics; Journal of Chemical Physics; 139; 14; 10-2013; 144907-1449070021-9606enginfo:eu-repo/semantics/altIdentifier/doi/10.1063/1.4823994info:eu-repo/semantics/altIdentifier/url/http://scitation.aip.org/content/aip/journal/jcp/139/14/10.1063/1.4823994info:eu-repo/semantics/altIdentifier/url/http://arxiv.org/abs/1305.1244info:eu-repo/semantics/altIdentifier/issn/0021-9606info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T09:35:14Zoai:ri.conicet.gov.ar:11336/4419instacron: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 09:35:14.491CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Evidence for several dipolar quasi-invariants in liquid crystals
title Evidence for several dipolar quasi-invariants in liquid crystals
spellingShingle Evidence for several dipolar quasi-invariants in liquid crystals
Bonin, Claudio Julio
Quasi invariants
NMR
Liquid crstals
Quasi equilibrium
title_short Evidence for several dipolar quasi-invariants in liquid crystals
title_full Evidence for several dipolar quasi-invariants in liquid crystals
title_fullStr Evidence for several dipolar quasi-invariants in liquid crystals
title_full_unstemmed Evidence for several dipolar quasi-invariants in liquid crystals
title_sort Evidence for several dipolar quasi-invariants in liquid crystals
dc.creator.none.fl_str_mv Bonin, Claudio Julio
González, C. E.
Segnorile, Hector Hugo
Zamar, Ricardo César
author Bonin, Claudio Julio
author_facet Bonin, Claudio Julio
González, C. E.
Segnorile, Hector Hugo
Zamar, Ricardo César
author_role author
author2 González, C. E.
Segnorile, Hector Hugo
Zamar, Ricardo César
author2_role author
author
author
dc.subject.none.fl_str_mv Quasi invariants
NMR
Liquid crstals
Quasi equilibrium
topic Quasi invariants
NMR
Liquid crstals
Quasi equilibrium
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv In a closed quantum system of N dipole coupled spins with magnetic quantum number I, there are (2I +1)N constants of motion, however, the possibility of observing such quasi-invariants (QIs) in solid-like spin systems in Nuclear Magnetic Resonance (NMR) is not a strictly exact prediction. The aim of this work is to provide experimental evidence of several QIs, in the proton NMR of small spin clusters, besides those already known Zeeman, and dipolar orders (strong and weak). We explore the spin states prepared with the Jeener-Broekaert pulse sequence by analyzing the timedomain signals yielded by this sequence as a function of the preparation times, in a variety of dipolar networks, solids and liquid crystals. We observe that the signals can be explained with two dipolar QIs only within a range of short preparation times. At longer times liquid crystal signals show an echo-like behaviour. We study their multiple quantum coherence content on a basis orthogonal to the z-basis and see that such states involve a significant number of correlated spins. Then we show that the NMR signals within the whole preparation time-scale can only be reconstructed by assuming the occurrence of multiple QIs which we experimentally isolate.
Fil: Bonin, Claudio Julio. Universidad Nacional de Córdoba. Facultad de Matemática, Astronomía y Física; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Santa Fe. Instituto de Desarrollo Tecnológico para la Industria Química (i); Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Santa Fe. Instituto de Física del Litoral; Argentina
Fil: González, C. E.. Universidad Nacional de Córdoba. Facultad de Matemática, Astronomía y Física; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Córdoba. Instituto de Física "Enrique Gaviola"; Argentina
Fil: Segnorile, Hector Hugo. Universidad Nacional de Córdoba. Facultad de Matemática, Astronomía y Física; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Córdoba. Instituto de Física "Enrique Gaviola"; Argentina
Fil: Zamar, Ricardo César. Universidad Nacional de Córdoba. Facultad de Matemática, Astronomía y Física; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Córdoba. Instituto de Física "Enrique Gaviola"; Argentina
description In a closed quantum system of N dipole coupled spins with magnetic quantum number I, there are (2I +1)N constants of motion, however, the possibility of observing such quasi-invariants (QIs) in solid-like spin systems in Nuclear Magnetic Resonance (NMR) is not a strictly exact prediction. The aim of this work is to provide experimental evidence of several QIs, in the proton NMR of small spin clusters, besides those already known Zeeman, and dipolar orders (strong and weak). We explore the spin states prepared with the Jeener-Broekaert pulse sequence by analyzing the timedomain signals yielded by this sequence as a function of the preparation times, in a variety of dipolar networks, solids and liquid crystals. We observe that the signals can be explained with two dipolar QIs only within a range of short preparation times. At longer times liquid crystal signals show an echo-like behaviour. We study their multiple quantum coherence content on a basis orthogonal to the z-basis and see that such states involve a significant number of correlated spins. Then we show that the NMR signals within the whole preparation time-scale can only be reconstructed by assuming the occurrence of multiple QIs which we experimentally isolate.
publishDate 2013
dc.date.none.fl_str_mv 2013-10
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/11336/4419
Bonin, Claudio Julio; González, C. E.; Segnorile, Hector Hugo; Zamar, Ricardo César; Evidence for several dipolar quasi-invariants in liquid crystals; American Institute of Physics; Journal of Chemical Physics; 139; 14; 10-2013; 144907-144907
0021-9606
url http://hdl.handle.net/11336/4419
identifier_str_mv Bonin, Claudio Julio; González, C. E.; Segnorile, Hector Hugo; Zamar, Ricardo César; Evidence for several dipolar quasi-invariants in liquid crystals; American Institute of Physics; Journal of Chemical Physics; 139; 14; 10-2013; 144907-144907
0021-9606
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1063/1.4823994
info:eu-repo/semantics/altIdentifier/url/http://scitation.aip.org/content/aip/journal/jcp/139/14/10.1063/1.4823994
info:eu-repo/semantics/altIdentifier/url/http://arxiv.org/abs/1305.1244
info:eu-repo/semantics/altIdentifier/issn/0021-9606
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
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
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score 13.070432

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