1-D Polymers with Alternate Cu2 and Ln2 Units (Ln ) Gd, Er, Y) and Carboxylate Linkages

Autores
Calvo, Rafael; Rapp, Raul E.; Chagas, Edson; Sartoris, Rosana Patricia; Baggio, Ricardo Fortunato; Garland, María; Perec, Mireille
Año de publicación
2008
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Three isostructural Cu2Ln2 1-D polymers [Cu2Ln2L10(H2O)4 · 3H2O]n where Ln ) Gd (1), Er (2), and Y (3) and HL) trans-2-butenoic acid, were synthesized and characterized by X-ray crystallography, electron paramagnetic resonance, and magnetic measurements. Pairs of alternate Cu2 and Ln2 dinuclear units are combined into a linear array by a set of one covalent η2:η1:μ2 carboxylate oxygen and two H bonds, at Cu · · · Ln distances of ca. 4.5 Å. These units exhibit four η1:η1:μ2 and two η2:η1:μ2 carboxylate bridges, respectively. Magnetic measurements between 2 and 300 K, fields B0 ) μ0H between 0 and 9 T, and electron paramagnetic resonance (EPR) measurements at the X-band and room temperature are reported. The magnetic susceptibilities indicate bulk antiferromagnetic behavior of the three compounds at low temperatures. Magnetization and EPR data for 1 and 3 allowed evaluation of the exchange couplings between both Cu and Gd ions in their dinuclear units and between Cu and Gd neighbor ions in the spin chains. The data for the isolated Cu2 units in 3 yield g|| ) 2.350 and g⊥ ) 2.054, JCu-Cu ) -338 (3) cm-1 for the exchange coupling [Hex(1,2) ) -J1-2 S1 · S2], and D0 ) -0.342 (0.003) cm-1 and E0 ) 0.003 (0.001) cm-1 for the zero-field-splitting parameters of the triplet state arising from anisotropic spin-spin interactions.Considering tetranuclear blocks Gd-Cu-Cu-Gd in 1, with the parameters for the Cu2 unit obtained for 3, we evaluated ferromagnetic interactions between Cu and Gd neighbors, JCu-Gd ) 13.0 (0.1) cm-1, and between Gd ions in the Gd2 units, JGd-Gd ) 0.25 (0.02) cm-1, with gGd ) 1.991. The bulk antiferromagnetic behavior of 1 is a consequence of the antiferromagnetic coupling between Cu ions and of the magnitude, |JCu-Gd|, of the Cu-Gd exchange coupling. Compound 2 displays a susceptibility peak at 15 K that may be interpreted as the combined result from antiferromagnetic couplings between ErIII ions in Er2 units and their coupling with the Cu2 units.
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
Fil: Rapp, Raul E.. Universidade Federal do Rio de Janeiro; Brasil
Fil: Chagas, Edson. Universidade Federal do Rio de Janeiro; Brasil
Fil: Sartoris, Rosana Patricia. Universidad Nacional del Litoral. Facultad de Bioquímica y Ciencias Biológicas. Departamento de Física; Argentina
Fil: Baggio, Ricardo Fortunato. Comisión Nacional de Energía Atómica; Argentina
Fil: Garland, María. Universidad de Chile; Chile
Fil: Perec, Mireille. Universidad de Buenos Aires; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Materia
Magnenismo
Esturctura Cristalina
Epr
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
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CONICET Digital (CONICET)
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Consejo Nacional de Investigaciones Científicas y Técnicas
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network_name_str CONICET Digital (CONICET)
spelling 1-D Polymers with Alternate Cu2 and Ln2 Units (Ln ) Gd, Er, Y) and Carboxylate LinkagesCalvo, RafaelRapp, Raul E.Chagas, EdsonSartoris, Rosana PatriciaBaggio, Ricardo FortunatoGarland, MaríaPerec, MireilleMagnenismoEsturctura CristalinaEprhttps://purl.org/becyt/ford/1.6https://purl.org/becyt/ford/1Three isostructural Cu2Ln2 1-D polymers [Cu2Ln2L10(H2O)4 · 3H2O]n where Ln ) Gd (1), Er (2), and Y (3) and HL) trans-2-butenoic acid, were synthesized and characterized by X-ray crystallography, electron paramagnetic resonance, and magnetic measurements. Pairs of alternate Cu2 and Ln2 dinuclear units are combined into a linear array by a set of one covalent η2:η1:μ2 carboxylate oxygen and two H bonds, at Cu · · · Ln distances of ca. 4.5 Å. These units exhibit four η1:η1:μ2 and two η2:η1:μ2 carboxylate bridges, respectively. Magnetic measurements between 2 and 300 K, fields B0 ) μ0H between 0 and 9 T, and electron paramagnetic resonance (EPR) measurements at the X-band and room temperature are reported. The magnetic susceptibilities indicate bulk antiferromagnetic behavior of the three compounds at low temperatures. Magnetization and EPR data for 1 and 3 allowed evaluation of the exchange couplings between both Cu and Gd ions in their dinuclear units and between Cu and Gd neighbor ions in the spin chains. The data for the isolated Cu2 units in 3 yield g|| ) 2.350 and g⊥ ) 2.054, JCu-Cu ) -338 (3) cm-1 for the exchange coupling [Hex(1,2) ) -J1-2 S1 · S2], and D0 ) -0.342 (0.003) cm-1 and E0 ) 0.003 (0.001) cm-1 for the zero-field-splitting parameters of the triplet state arising from anisotropic spin-spin interactions.Considering tetranuclear blocks Gd-Cu-Cu-Gd in 1, with the parameters for the Cu2 unit obtained for 3, we evaluated ferromagnetic interactions between Cu and Gd neighbors, JCu-Gd ) 13.0 (0.1) cm-1, and between Gd ions in the Gd2 units, JGd-Gd ) 0.25 (0.02) cm-1, with gGd ) 1.991. The bulk antiferromagnetic behavior of 1 is a consequence of the antiferromagnetic coupling between Cu ions and of the magnitude, |JCu-Gd|, of the Cu-Gd exchange coupling. Compound 2 displays a susceptibility peak at 15 K that may be interpreted as the combined result from antiferromagnetic couplings between ErIII ions in Er2 units and their coupling with the Cu2 units.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; ArgentinaFil: Rapp, Raul E.. Universidade Federal do Rio de Janeiro; BrasilFil: Chagas, Edson. Universidade Federal do Rio de Janeiro; BrasilFil: Sartoris, Rosana Patricia. Universidad Nacional del Litoral. Facultad de Bioquímica y Ciencias Biológicas. Departamento de Física; ArgentinaFil: Baggio, Ricardo Fortunato. Comisión Nacional de Energía Atómica; ArgentinaFil: Garland, María. Universidad de Chile; ChileFil: Perec, Mireille. Universidad de Buenos Aires; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaAmerican Chemical Society2008-10info: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/11336/24934Calvo, Rafael; Rapp, Raul E.; Chagas, Edson; Sartoris, Rosana Patricia; Baggio, Ricardo Fortunato; et al.; 1-D Polymers with Alternate Cu2 and Ln2 Units (Ln ) Gd, Er, Y) and Carboxylate Linkages; American Chemical Society; Inorganic Chemistry; 47; 22; 10-2008; 10389-103970020-1669CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1021/ic8014089info:eu-repo/semantics/altIdentifier/url/http://pubs.acs.org/doi/abs/10.1021/ic8014089info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T09:47:35Zoai:ri.conicet.gov.ar:11336/24934instacron: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:34982025-09-03 09:47:35.322CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv 1-D Polymers with Alternate Cu2 and Ln2 Units (Ln ) Gd, Er, Y) and Carboxylate Linkages
title 1-D Polymers with Alternate Cu2 and Ln2 Units (Ln ) Gd, Er, Y) and Carboxylate Linkages
spellingShingle 1-D Polymers with Alternate Cu2 and Ln2 Units (Ln ) Gd, Er, Y) and Carboxylate Linkages
Calvo, Rafael
Magnenismo
Esturctura Cristalina
Epr
title_short 1-D Polymers with Alternate Cu2 and Ln2 Units (Ln ) Gd, Er, Y) and Carboxylate Linkages
title_full 1-D Polymers with Alternate Cu2 and Ln2 Units (Ln ) Gd, Er, Y) and Carboxylate Linkages
title_fullStr 1-D Polymers with Alternate Cu2 and Ln2 Units (Ln ) Gd, Er, Y) and Carboxylate Linkages
title_full_unstemmed 1-D Polymers with Alternate Cu2 and Ln2 Units (Ln ) Gd, Er, Y) and Carboxylate Linkages
title_sort 1-D Polymers with Alternate Cu2 and Ln2 Units (Ln ) Gd, Er, Y) and Carboxylate Linkages
dc.creator.none.fl_str_mv Calvo, Rafael
Rapp, Raul E.
Chagas, Edson
Sartoris, Rosana Patricia
Baggio, Ricardo Fortunato
Garland, María
Perec, Mireille
author Calvo, Rafael
author_facet Calvo, Rafael
Rapp, Raul E.
Chagas, Edson
Sartoris, Rosana Patricia
Baggio, Ricardo Fortunato
Garland, María
Perec, Mireille
author_role author
author2 Rapp, Raul E.
Chagas, Edson
Sartoris, Rosana Patricia
Baggio, Ricardo Fortunato
Garland, María
Perec, Mireille
author2_role author
author
author
author
author
author
dc.subject.none.fl_str_mv Magnenismo
Esturctura Cristalina
Epr
topic Magnenismo
Esturctura Cristalina
Epr
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.6
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Three isostructural Cu2Ln2 1-D polymers [Cu2Ln2L10(H2O)4 · 3H2O]n where Ln ) Gd (1), Er (2), and Y (3) and HL) trans-2-butenoic acid, were synthesized and characterized by X-ray crystallography, electron paramagnetic resonance, and magnetic measurements. Pairs of alternate Cu2 and Ln2 dinuclear units are combined into a linear array by a set of one covalent η2:η1:μ2 carboxylate oxygen and two H bonds, at Cu · · · Ln distances of ca. 4.5 Å. These units exhibit four η1:η1:μ2 and two η2:η1:μ2 carboxylate bridges, respectively. Magnetic measurements between 2 and 300 K, fields B0 ) μ0H between 0 and 9 T, and electron paramagnetic resonance (EPR) measurements at the X-band and room temperature are reported. The magnetic susceptibilities indicate bulk antiferromagnetic behavior of the three compounds at low temperatures. Magnetization and EPR data for 1 and 3 allowed evaluation of the exchange couplings between both Cu and Gd ions in their dinuclear units and between Cu and Gd neighbor ions in the spin chains. The data for the isolated Cu2 units in 3 yield g|| ) 2.350 and g⊥ ) 2.054, JCu-Cu ) -338 (3) cm-1 for the exchange coupling [Hex(1,2) ) -J1-2 S1 · S2], and D0 ) -0.342 (0.003) cm-1 and E0 ) 0.003 (0.001) cm-1 for the zero-field-splitting parameters of the triplet state arising from anisotropic spin-spin interactions.Considering tetranuclear blocks Gd-Cu-Cu-Gd in 1, with the parameters for the Cu2 unit obtained for 3, we evaluated ferromagnetic interactions between Cu and Gd neighbors, JCu-Gd ) 13.0 (0.1) cm-1, and between Gd ions in the Gd2 units, JGd-Gd ) 0.25 (0.02) cm-1, with gGd ) 1.991. The bulk antiferromagnetic behavior of 1 is a consequence of the antiferromagnetic coupling between Cu ions and of the magnitude, |JCu-Gd|, of the Cu-Gd exchange coupling. Compound 2 displays a susceptibility peak at 15 K that may be interpreted as the combined result from antiferromagnetic couplings between ErIII ions in Er2 units and their coupling with the Cu2 units.
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
Fil: Rapp, Raul E.. Universidade Federal do Rio de Janeiro; Brasil
Fil: Chagas, Edson. Universidade Federal do Rio de Janeiro; Brasil
Fil: Sartoris, Rosana Patricia. Universidad Nacional del Litoral. Facultad de Bioquímica y Ciencias Biológicas. Departamento de Física; Argentina
Fil: Baggio, Ricardo Fortunato. Comisión Nacional de Energía Atómica; Argentina
Fil: Garland, María. Universidad de Chile; Chile
Fil: Perec, Mireille. Universidad de Buenos Aires; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
description Three isostructural Cu2Ln2 1-D polymers [Cu2Ln2L10(H2O)4 · 3H2O]n where Ln ) Gd (1), Er (2), and Y (3) and HL) trans-2-butenoic acid, were synthesized and characterized by X-ray crystallography, electron paramagnetic resonance, and magnetic measurements. Pairs of alternate Cu2 and Ln2 dinuclear units are combined into a linear array by a set of one covalent η2:η1:μ2 carboxylate oxygen and two H bonds, at Cu · · · Ln distances of ca. 4.5 Å. These units exhibit four η1:η1:μ2 and two η2:η1:μ2 carboxylate bridges, respectively. Magnetic measurements between 2 and 300 K, fields B0 ) μ0H between 0 and 9 T, and electron paramagnetic resonance (EPR) measurements at the X-band and room temperature are reported. The magnetic susceptibilities indicate bulk antiferromagnetic behavior of the three compounds at low temperatures. Magnetization and EPR data for 1 and 3 allowed evaluation of the exchange couplings between both Cu and Gd ions in their dinuclear units and between Cu and Gd neighbor ions in the spin chains. The data for the isolated Cu2 units in 3 yield g|| ) 2.350 and g⊥ ) 2.054, JCu-Cu ) -338 (3) cm-1 for the exchange coupling [Hex(1,2) ) -J1-2 S1 · S2], and D0 ) -0.342 (0.003) cm-1 and E0 ) 0.003 (0.001) cm-1 for the zero-field-splitting parameters of the triplet state arising from anisotropic spin-spin interactions.Considering tetranuclear blocks Gd-Cu-Cu-Gd in 1, with the parameters for the Cu2 unit obtained for 3, we evaluated ferromagnetic interactions between Cu and Gd neighbors, JCu-Gd ) 13.0 (0.1) cm-1, and between Gd ions in the Gd2 units, JGd-Gd ) 0.25 (0.02) cm-1, with gGd ) 1.991. The bulk antiferromagnetic behavior of 1 is a consequence of the antiferromagnetic coupling between Cu ions and of the magnitude, |JCu-Gd|, of the Cu-Gd exchange coupling. Compound 2 displays a susceptibility peak at 15 K that may be interpreted as the combined result from antiferromagnetic couplings between ErIII ions in Er2 units and their coupling with the Cu2 units.
publishDate 2008
dc.date.none.fl_str_mv 2008-10
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/11336/24934
Calvo, Rafael; Rapp, Raul E.; Chagas, Edson; Sartoris, Rosana Patricia; Baggio, Ricardo Fortunato; et al.; 1-D Polymers with Alternate Cu2 and Ln2 Units (Ln ) Gd, Er, Y) and Carboxylate Linkages; American Chemical Society; Inorganic Chemistry; 47; 22; 10-2008; 10389-10397
0020-1669
CONICET Digital
CONICET
url http://hdl.handle.net/11336/24934
identifier_str_mv Calvo, Rafael; Rapp, Raul E.; Chagas, Edson; Sartoris, Rosana Patricia; Baggio, Ricardo Fortunato; et al.; 1-D Polymers with Alternate Cu2 and Ln2 Units (Ln ) Gd, Er, Y) and Carboxylate Linkages; American Chemical Society; Inorganic Chemistry; 47; 22; 10-2008; 10389-10397
0020-1669
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1021/ic8014089
info:eu-repo/semantics/altIdentifier/url/http://pubs.acs.org/doi/abs/10.1021/ic8014089
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 Chemical Society
publisher.none.fl_str_mv American Chemical Society
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 13.13397

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