EPR study of Cu(II) dopant ions in single crystals of bis(L-asparaginato)Zn(II)

Autores
Santana, R. C.; Santos, M. G.; Cunha, R. O.; Ferreira, K. D.; Carvalho, J. F.; Calvo, Rafael
Año de publicación
2006
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
We report an electron paramagnetic resonance (EPR) study at 33.9 GHz and room temperature of oriented single crystal samples of bis(Lasparaginato) Zn(II) doped with Cu(II). The variation of the spectra with magnetic field orientation was measured in three crystal planes (a*b, bc and a*c, with a*Zb!c). These spectra display two groups of four peaks arising from the hyperfine interaction with the ICuZ3/2 nuclear spins of copper. They were assigned to Cu(II) ions in two lattice sites related by a 1808 rotation around the b-crystal axis. The g and hyperfine coupling (A) tensors of the Cu(II) ions were evaluated from the single crystal data. Some indeterminacy in the assignment of the signals was avoided measuring the EPR spectrum of a powder sample. Their principal values are g1Z2.060(1), g2Z2.068(2), g3Z2.283(2), and A1z0.1!10K4, A2Z13!10K4 and A3Z165!10K4 cmK1. The eigenvectors corresponding to g3 and A3 are coincident within the experimental error; the other eigenvectors are rotated 5.68 in the perpendicular plane. Considering the crystal structure of bis(L-asparaginato)Zn(II), our EPR results indicate that the Cu(II) impurities replace Zn(II) ions in the host crystal. We propose a molecular model based on the EPR data and the structural information, and analyse the results comparing the measured values with those obtained in similar systems. q 2005 Elsevier Ltd. All rights reserved.
Fil: Santana, R. C.. Universidade Federal de Goiás; Brasil
Fil: Santos, M. G.. Universidade Federal de Goiás; Brasil
Fil: Cunha, R. O.. Universidade Federal de Goiás; Brasil
Fil: Ferreira, K. D.. Universidade Federal de Goiás; Brasil
Fil: Carvalho, J. F.. Universidade Federal de Goiás; Brasil
Fil: Calvo, Rafael. 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
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:11336/21461
Acceder
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network_name_str CONICET Digital (CONICET)
spelling EPR study of Cu(II) dopant ions in single crystals of bis(L-asparaginato)Zn(II)Santana, R. C.Santos, M. G.Cunha, R. O.Ferreira, K. D.Carvalho, J. F.Calvo, Rafaelhttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1We report an electron paramagnetic resonance (EPR) study at 33.9 GHz and room temperature of oriented single crystal samples of bis(Lasparaginato) Zn(II) doped with Cu(II). The variation of the spectra with magnetic field orientation was measured in three crystal planes (a*b, bc and a*c, with a*Zb!c). These spectra display two groups of four peaks arising from the hyperfine interaction with the ICuZ3/2 nuclear spins of copper. They were assigned to Cu(II) ions in two lattice sites related by a 1808 rotation around the b-crystal axis. The g and hyperfine coupling (A) tensors of the Cu(II) ions were evaluated from the single crystal data. Some indeterminacy in the assignment of the signals was avoided measuring the EPR spectrum of a powder sample. Their principal values are g1Z2.060(1), g2Z2.068(2), g3Z2.283(2), and A1z0.1!10K4, A2Z13!10K4 and A3Z165!10K4 cmK1. The eigenvectors corresponding to g3 and A3 are coincident within the experimental error; the other eigenvectors are rotated 5.68 in the perpendicular plane. Considering the crystal structure of bis(L-asparaginato)Zn(II), our EPR results indicate that the Cu(II) impurities replace Zn(II) ions in the host crystal. We propose a molecular model based on the EPR data and the structural information, and analyse the results comparing the measured values with those obtained in similar systems. q 2005 Elsevier Ltd. All rights reserved.Fil: Santana, R. C.. Universidade Federal de Goiás; BrasilFil: Santos, M. G.. Universidade Federal de Goiás; BrasilFil: Cunha, R. O.. Universidade Federal de Goiás; BrasilFil: Ferreira, K. D.. Universidade Federal de Goiás; BrasilFil: Carvalho, J. F.. Universidade Federal de Goiás; BrasilFil: Calvo, Rafael. 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; ArgentinaElsevier2006-12info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/21461Santana, R. C.; Santos, M. G.; Cunha, R. O.; Ferreira, K. D.; Carvalho, J. F.; et al.; EPR study of Cu(II) dopant ions in single crystals of bis(L-asparaginato)Zn(II); Elsevier; Journal of Physics and Chemistry of Solids; 67; 4; 12-2006; 745-7500022-3697CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.jpcs.2005.11.006info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0022369705006335info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-15T15:44:23Zoai:ri.conicet.gov.ar:11336/21461instacron: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 15:44:23.499CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv EPR study of Cu(II) dopant ions in single crystals of bis(L-asparaginato)Zn(II)
title EPR study of Cu(II) dopant ions in single crystals of bis(L-asparaginato)Zn(II)
spellingShingle EPR study of Cu(II) dopant ions in single crystals of bis(L-asparaginato)Zn(II)
Santana, R. C.
title_short EPR study of Cu(II) dopant ions in single crystals of bis(L-asparaginato)Zn(II)
title_full EPR study of Cu(II) dopant ions in single crystals of bis(L-asparaginato)Zn(II)
title_fullStr EPR study of Cu(II) dopant ions in single crystals of bis(L-asparaginato)Zn(II)
title_full_unstemmed EPR study of Cu(II) dopant ions in single crystals of bis(L-asparaginato)Zn(II)
title_sort EPR study of Cu(II) dopant ions in single crystals of bis(L-asparaginato)Zn(II)
dc.creator.none.fl_str_mv Santana, R. C.
Santos, M. G.
Cunha, R. O.
Ferreira, K. D.
Carvalho, J. F.
Calvo, Rafael
author Santana, R. C.
author_facet Santana, R. C.
Santos, M. G.
Cunha, R. O.
Ferreira, K. D.
Carvalho, J. F.
Calvo, Rafael
author_role author
author2 Santos, M. G.
Cunha, R. O.
Ferreira, K. D.
Carvalho, J. F.
Calvo, Rafael
author2_role author
author
author
author
author
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv We report an electron paramagnetic resonance (EPR) study at 33.9 GHz and room temperature of oriented single crystal samples of bis(Lasparaginato) Zn(II) doped with Cu(II). The variation of the spectra with magnetic field orientation was measured in three crystal planes (a*b, bc and a*c, with a*Zb!c). These spectra display two groups of four peaks arising from the hyperfine interaction with the ICuZ3/2 nuclear spins of copper. They were assigned to Cu(II) ions in two lattice sites related by a 1808 rotation around the b-crystal axis. The g and hyperfine coupling (A) tensors of the Cu(II) ions were evaluated from the single crystal data. Some indeterminacy in the assignment of the signals was avoided measuring the EPR spectrum of a powder sample. Their principal values are g1Z2.060(1), g2Z2.068(2), g3Z2.283(2), and A1z0.1!10K4, A2Z13!10K4 and A3Z165!10K4 cmK1. The eigenvectors corresponding to g3 and A3 are coincident within the experimental error; the other eigenvectors are rotated 5.68 in the perpendicular plane. Considering the crystal structure of bis(L-asparaginato)Zn(II), our EPR results indicate that the Cu(II) impurities replace Zn(II) ions in the host crystal. We propose a molecular model based on the EPR data and the structural information, and analyse the results comparing the measured values with those obtained in similar systems. q 2005 Elsevier Ltd. All rights reserved.
Fil: Santana, R. C.. Universidade Federal de Goiás; Brasil
Fil: Santos, M. G.. Universidade Federal de Goiás; Brasil
Fil: Cunha, R. O.. Universidade Federal de Goiás; Brasil
Fil: Ferreira, K. D.. Universidade Federal de Goiás; Brasil
Fil: Carvalho, J. F.. Universidade Federal de Goiás; Brasil
Fil: Calvo, Rafael. 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
description We report an electron paramagnetic resonance (EPR) study at 33.9 GHz and room temperature of oriented single crystal samples of bis(Lasparaginato) Zn(II) doped with Cu(II). The variation of the spectra with magnetic field orientation was measured in three crystal planes (a*b, bc and a*c, with a*Zb!c). These spectra display two groups of four peaks arising from the hyperfine interaction with the ICuZ3/2 nuclear spins of copper. They were assigned to Cu(II) ions in two lattice sites related by a 1808 rotation around the b-crystal axis. The g and hyperfine coupling (A) tensors of the Cu(II) ions were evaluated from the single crystal data. Some indeterminacy in the assignment of the signals was avoided measuring the EPR spectrum of a powder sample. Their principal values are g1Z2.060(1), g2Z2.068(2), g3Z2.283(2), and A1z0.1!10K4, A2Z13!10K4 and A3Z165!10K4 cmK1. The eigenvectors corresponding to g3 and A3 are coincident within the experimental error; the other eigenvectors are rotated 5.68 in the perpendicular plane. Considering the crystal structure of bis(L-asparaginato)Zn(II), our EPR results indicate that the Cu(II) impurities replace Zn(II) ions in the host crystal. We propose a molecular model based on the EPR data and the structural information, and analyse the results comparing the measured values with those obtained in similar systems. q 2005 Elsevier Ltd. All rights reserved.
publishDate 2006
dc.date.none.fl_str_mv 2006-12
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/11336/21461
Santana, R. C.; Santos, M. G.; Cunha, R. O.; Ferreira, K. D.; Carvalho, J. F.; et al.; EPR study of Cu(II) dopant ions in single crystals of bis(L-asparaginato)Zn(II); Elsevier; Journal of Physics and Chemistry of Solids; 67; 4; 12-2006; 745-750
0022-3697
CONICET Digital
CONICET
url http://hdl.handle.net/11336/21461
identifier_str_mv Santana, R. C.; Santos, M. G.; Cunha, R. O.; Ferreira, K. D.; Carvalho, J. F.; et al.; EPR study of Cu(II) dopant ions in single crystals of bis(L-asparaginato)Zn(II); Elsevier; Journal of Physics and Chemistry of Solids; 67; 4; 12-2006; 745-750
0022-3697
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jpcs.2005.11.006
info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0022369705006335
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
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
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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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