Electron Paramagnetic Resonance Study of Ternary CuII Compounds with Glycine and Phenanthroline

Autores
Santana, Ricardo C.; Araújo, Anderson B. C.; Carvalho, Jesiel F.; Calvo, Rafael
Año de publicación
2014
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
We report electron paramagnetic resonance (EPR) measurements at 9 and 34 GHz, and room temperature (T), in powder and single crystal samples of the ternary compounds of copper nitrate or copper chloride with glycine and 1,10-phenanthroline [Cu(Gly)(phen)(H2O)]∙NO3∙1.5H2O (1) and [Cu(Gly)(phen)Cl]2∙7H2O (2). In compound 1 the copper ions are arranged in 1-D chains along one of the crystal axes connected by syn-anti carboxylate ligands, while in 2 the array is nearly 3-D and the connections involve H-bonds and stacking interactions. The angular variation of the squared g-factor and the line width were measured as a function of orientation of the magnetic field (B0) in three orthogonal crystal planes. In both compounds we observed one resonance without hyperfine structure for any magnetic field orientation which we attribute to the collapse of the hyperfine coupling and of the resonances of two chemically identical but rotated coppers in the unit cell, produced by exchange interactions. We analyze the results in terms of the structures of the compounds and of the chemical paths connecting neighbor copper ions which support the exchange interactions between neighbor spins in the lattice. Considering the collapse of the EPR signals of rotated sites in the lattices we are able to set lower  limits to the exchange interactions, which are supported by weak equatorial-apical carboxylate bridges in 1, and by paths containing hydrogen bonds and aromatic interactions in 2. Broadening due to dipole dipole couplings and hyperfine interactions are strongly reduced by these exchange couplings and their role in the EPR line width is more difficult to recognize.
Fil: Santana, Ricardo C.. Universidade Federal de Goias; Brasil
Fil: Araújo, Anderson B. C.. Universidade Federal de Goias; Brasil
Fil: Carvalho, Jesiel F.. Universidade Federal de Goias; Brasil
Fil: Calvo, Rafael. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Santa Fe. Instituto de Física del Litoral; Argentina. Universidad Nacional del Litoral. Facultad de Bioquímica y Ciencias Biológicas. Departamento de Física; Argentina
Materia
Ternary Copper Compounds
Epr
Glycine
Magnetic Interactions
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:11336/4407
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/4407
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Electron Paramagnetic Resonance Study of Ternary CuII Compounds with Glycine and PhenanthrolineSantana, Ricardo C.Araújo, Anderson B. C.Carvalho, Jesiel F.Calvo, RafaelTernary Copper CompoundsEprGlycineMagnetic Interactionshttps://purl.org/becyt/ford/1.4https://purl.org/becyt/ford/1We report electron paramagnetic resonance (EPR) measurements at 9 and 34 GHz, and room temperature (T), in powder and single crystal samples of the ternary compounds of copper nitrate or copper chloride with glycine and 1,10-phenanthroline [Cu(Gly)(phen)(H2O)]∙NO3∙1.5H2O (1) and [Cu(Gly)(phen)Cl]2∙7H2O (2). In compound 1 the copper ions are arranged in 1-D chains along one of the crystal axes connected by syn-anti carboxylate ligands, while in 2 the array is nearly 3-D and the connections involve H-bonds and stacking interactions. The angular variation of the squared g-factor and the line width were measured as a function of orientation of the magnetic field (B0) in three orthogonal crystal planes. In both compounds we observed one resonance without hyperfine structure for any magnetic field orientation which we attribute to the collapse of the hyperfine coupling and of the resonances of two chemically identical but rotated coppers in the unit cell, produced by exchange interactions. We analyze the results in terms of the structures of the compounds and of the chemical paths connecting neighbor copper ions which support the exchange interactions between neighbor spins in the lattice. Considering the collapse of the EPR signals of rotated sites in the lattices we are able to set lower  limits to the exchange interactions, which are supported by weak equatorial-apical carboxylate bridges in 1, and by paths containing hydrogen bonds and aromatic interactions in 2. Broadening due to dipole dipole couplings and hyperfine interactions are strongly reduced by these exchange couplings and their role in the EPR line width is more difficult to recognize.Fil: Santana, Ricardo C.. Universidade Federal de Goias; BrasilFil: Araújo, Anderson B. C.. Universidade Federal de Goias; BrasilFil: Carvalho, Jesiel F.. Universidade Federal de Goias; BrasilFil: Calvo, Rafael. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Santa Fe. Instituto de Física del Litoral; Argentina. Universidad Nacional del Litoral. Facultad de Bioquímica y Ciencias Biológicas. Departamento de Física; ArgentinaSpringer2014-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/4407Santana, Ricardo C.; Araújo, Anderson B. C.; Carvalho, Jesiel F.; Calvo, Rafael; Electron Paramagnetic Resonance Study of Ternary CuII Compounds with Glycine and Phenanthroline; Springer; Journal of Chemical Sciences; 126; 1; 1-2014; 255-2640974-3626enginfo:eu-repo/semantics/altIdentifier/url/http://link.springer.com/article/10.1007/s12039-013-0553-0info:eu-repo/semantics/altIdentifier/doi/10.1007/s12039-013-0553-0info:eu-repo/semantics/altIdentifier/issn/0974-3626info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T09:44:32Zoai:ri.conicet.gov.ar:11336/4407instacron: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 09:44:32.404CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Electron Paramagnetic Resonance Study of Ternary CuII Compounds with Glycine and Phenanthroline
title Electron Paramagnetic Resonance Study of Ternary CuII Compounds with Glycine and Phenanthroline
spellingShingle Electron Paramagnetic Resonance Study of Ternary CuII Compounds with Glycine and Phenanthroline
Santana, Ricardo C.
Ternary Copper Compounds
Epr
Glycine
Magnetic Interactions
title_short Electron Paramagnetic Resonance Study of Ternary CuII Compounds with Glycine and Phenanthroline
title_full Electron Paramagnetic Resonance Study of Ternary CuII Compounds with Glycine and Phenanthroline
title_fullStr Electron Paramagnetic Resonance Study of Ternary CuII Compounds with Glycine and Phenanthroline
title_full_unstemmed Electron Paramagnetic Resonance Study of Ternary CuII Compounds with Glycine and Phenanthroline
title_sort Electron Paramagnetic Resonance Study of Ternary CuII Compounds with Glycine and Phenanthroline
dc.creator.none.fl_str_mv Santana, Ricardo C.
Araújo, Anderson B. C.
Carvalho, Jesiel F.
Calvo, Rafael
author Santana, Ricardo C.
author_facet Santana, Ricardo C.
Araújo, Anderson B. C.
Carvalho, Jesiel F.
Calvo, Rafael
author_role author
author2 Araújo, Anderson B. C.
Carvalho, Jesiel F.
Calvo, Rafael
author2_role author
author
author
dc.subject.none.fl_str_mv Ternary Copper Compounds
Epr
Glycine
Magnetic Interactions
topic Ternary Copper Compounds
Epr
Glycine
Magnetic Interactions
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.4
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv We report electron paramagnetic resonance (EPR) measurements at 9 and 34 GHz, and room temperature (T), in powder and single crystal samples of the ternary compounds of copper nitrate or copper chloride with glycine and 1,10-phenanthroline [Cu(Gly)(phen)(H2O)]∙NO3∙1.5H2O (1) and [Cu(Gly)(phen)Cl]2∙7H2O (2). In compound 1 the copper ions are arranged in 1-D chains along one of the crystal axes connected by syn-anti carboxylate ligands, while in 2 the array is nearly 3-D and the connections involve H-bonds and stacking interactions. The angular variation of the squared g-factor and the line width were measured as a function of orientation of the magnetic field (B0) in three orthogonal crystal planes. In both compounds we observed one resonance without hyperfine structure for any magnetic field orientation which we attribute to the collapse of the hyperfine coupling and of the resonances of two chemically identical but rotated coppers in the unit cell, produced by exchange interactions. We analyze the results in terms of the structures of the compounds and of the chemical paths connecting neighbor copper ions which support the exchange interactions between neighbor spins in the lattice. Considering the collapse of the EPR signals of rotated sites in the lattices we are able to set lower  limits to the exchange interactions, which are supported by weak equatorial-apical carboxylate bridges in 1, and by paths containing hydrogen bonds and aromatic interactions in 2. Broadening due to dipole dipole couplings and hyperfine interactions are strongly reduced by these exchange couplings and their role in the EPR line width is more difficult to recognize.
Fil: Santana, Ricardo C.. Universidade Federal de Goias; Brasil
Fil: Araújo, Anderson B. C.. Universidade Federal de Goias; Brasil
Fil: Carvalho, Jesiel F.. Universidade Federal de Goias; Brasil
Fil: Calvo, Rafael. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Santa Fe. Instituto de Física del Litoral; Argentina. Universidad Nacional del Litoral. Facultad de Bioquímica y Ciencias Biológicas. Departamento de Física; Argentina
description We report electron paramagnetic resonance (EPR) measurements at 9 and 34 GHz, and room temperature (T), in powder and single crystal samples of the ternary compounds of copper nitrate or copper chloride with glycine and 1,10-phenanthroline [Cu(Gly)(phen)(H2O)]∙NO3∙1.5H2O (1) and [Cu(Gly)(phen)Cl]2∙7H2O (2). In compound 1 the copper ions are arranged in 1-D chains along one of the crystal axes connected by syn-anti carboxylate ligands, while in 2 the array is nearly 3-D and the connections involve H-bonds and stacking interactions. The angular variation of the squared g-factor and the line width were measured as a function of orientation of the magnetic field (B0) in three orthogonal crystal planes. In both compounds we observed one resonance without hyperfine structure for any magnetic field orientation which we attribute to the collapse of the hyperfine coupling and of the resonances of two chemically identical but rotated coppers in the unit cell, produced by exchange interactions. We analyze the results in terms of the structures of the compounds and of the chemical paths connecting neighbor copper ions which support the exchange interactions between neighbor spins in the lattice. Considering the collapse of the EPR signals of rotated sites in the lattices we are able to set lower  limits to the exchange interactions, which are supported by weak equatorial-apical carboxylate bridges in 1, and by paths containing hydrogen bonds and aromatic interactions in 2. Broadening due to dipole dipole couplings and hyperfine interactions are strongly reduced by these exchange couplings and their role in the EPR line width is more difficult to recognize.
publishDate 2014
dc.date.none.fl_str_mv 2014-01
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/11336/4407
Santana, Ricardo C.; Araújo, Anderson B. C.; Carvalho, Jesiel F.; Calvo, Rafael; Electron Paramagnetic Resonance Study of Ternary CuII Compounds with Glycine and Phenanthroline; Springer; Journal of Chemical Sciences; 126; 1; 1-2014; 255-264
0974-3626
url http://hdl.handle.net/11336/4407
identifier_str_mv Santana, Ricardo C.; Araújo, Anderson B. C.; Carvalho, Jesiel F.; Calvo, Rafael; Electron Paramagnetic Resonance Study of Ternary CuII Compounds with Glycine and Phenanthroline; Springer; Journal of Chemical Sciences; 126; 1; 1-2014; 255-264
0974-3626
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/http://link.springer.com/article/10.1007/s12039-013-0553-0
info:eu-repo/semantics/altIdentifier/doi/10.1007/s12039-013-0553-0
info:eu-repo/semantics/altIdentifier/issn/0974-3626
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 Springer
publisher.none.fl_str_mv Springer
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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