Singlet ground state in compounds with [MnIII4O2]8+ core due to broken degeneration

Two new tetranuclear compounds with a formula [MnIII4(μ-O)2(μ-4-RC6H4COO)7−m(L)2m(phen)2](ClO4)1+m, where R = MeO or tBu and m = 0 or 1, were synthesised and studied structurally and magnetically. The core of these compounds comprises a central Mn2O2 rhombus to which two terminal ions are attached -...

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Autores: Escriche Tur, Luis, Albela Castrillo, Mª Belén, Font Bardia, Ma. Mercedes, Corbella i Cordomí, Montserrat
Tipo de recurso: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2017
País:España
Institución:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
Repositorio:Recercat. Dipósit de la Recerca de Catalunya
OAI Identifier:oai:recercat.cat:2445/163397
Acceso en línea:https://hdl.handle.net/2445/163397
Access Level:acceso abierto
Palabra clave:Manganès
Ferromagnetisme
Ions
Manganese
Ferromagnetism
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spelling Singlet ground state in compounds with [MnIII4O2]8+ core due to broken degenerationEscriche Tur, LuisAlbela Castrillo, Mª BelénFont Bardia, Ma. MercedesCorbella i Cordomí, MontserratManganèsFerromagnetismeIonsManganeseFerromagnetismIonsTwo new tetranuclear compounds with a formula [MnIII4(μ-O)2(μ-4-RC6H4COO)7−m(L)2m(phen)2](ClO4)1+m, where R = MeO or tBu and m = 0 or 1, were synthesised and studied structurally and magnetically. The core of these compounds comprises a central Mn2O2 rhombus to which two terminal ions are attached - one to each oxo bridge. There are two types of bridges that alternately bind the central and terminal ions, those having a triple (μ-O)(μ-RCOO)2 or a double (μ-O)(μ-RCOO) bridge. The fit of the magnetic data of analogous compounds has so far been performed considering two different magnetic interactions, that between central ions (J1) and those between terminal and central ions (Jct), leading to ground states with ST = 2 or 3, or to five energetically degenerate ground states with ST = 0-4, depending on the J1/Jct ratio. In contrast, the compounds presented herein show an isolated ST = 0 ground state, and it was necessary to distinguish the two types of magnetic interactions between central and terminal ions (J2 and J3) to achieve a good fit of the experimental data. The differentiation of these interactions causes a spin state redistribution: the degeneration of ST = 0-4 breaks and the states with ST ≠ 0 become unstable as J2 and J3 become more different. Nevertheless, the assignment of these states to a particular spin configuration was unachievable because the composition of these states changes upon decreasing the J3/J2 ratio. The importance of considering the relative orientation of Jahn-Teller axes is also highlighted.Royal Society of Chemistry2020202020172020info:eu-repo/semantics/articleinfo:eu-repo/semantics/acceptedVersion22 p.application/pdfhttps://hdl.handle.net/2445/163397Articles publicats en revistes (Mineralogia, Petrologia i Geologia Aplicada)reponame:Recercat. Dipósit de la Recerca de Catalunyainstname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)InglésVersió postprint del document publicat a: https://doi.org/10.1039/C6NJ03845JNew Journal of Chemistry, 2017, vol. 41, num. 8, p. 2934-2940https://doi.org/10.1039/C6NJ03845J(c) Escriche Tur, Luis et al., 2017info:eu-repo/semantics/openAccessoai:recercat.cat:2445/1633972026-05-29T05:05:01Z
dc.title.none.fl_str_mv Singlet ground state in compounds with [MnIII4O2]8+ core due to broken degeneration
title Singlet ground state in compounds with [MnIII4O2]8+ core due to broken degeneration
spellingShingle Singlet ground state in compounds with [MnIII4O2]8+ core due to broken degeneration
Escriche Tur, Luis
Manganès
Ferromagnetisme
Ions
Manganese
Ferromagnetism
Ions
title_short Singlet ground state in compounds with [MnIII4O2]8+ core due to broken degeneration
title_full Singlet ground state in compounds with [MnIII4O2]8+ core due to broken degeneration
title_fullStr Singlet ground state in compounds with [MnIII4O2]8+ core due to broken degeneration
title_full_unstemmed Singlet ground state in compounds with [MnIII4O2]8+ core due to broken degeneration
title_sort Singlet ground state in compounds with [MnIII4O2]8+ core due to broken degeneration
dc.creator.none.fl_str_mv Escriche Tur, Luis
Albela Castrillo, Mª Belén
Font Bardia, Ma. Mercedes
Corbella i Cordomí, Montserrat
author Escriche Tur, Luis
author_facet Escriche Tur, Luis
Albela Castrillo, Mª Belén
Font Bardia, Ma. Mercedes
Corbella i Cordomí, Montserrat
author_role author
author2 Albela Castrillo, Mª Belén
Font Bardia, Ma. Mercedes
Corbella i Cordomí, Montserrat
author2_role author
author
author
dc.subject.none.fl_str_mv Manganès
Ferromagnetisme
Ions
Manganese
Ferromagnetism
Ions
topic Manganès
Ferromagnetisme
Ions
Manganese
Ferromagnetism
Ions
description Two new tetranuclear compounds with a formula [MnIII4(μ-O)2(μ-4-RC6H4COO)7−m(L)2m(phen)2](ClO4)1+m, where R = MeO or tBu and m = 0 or 1, were synthesised and studied structurally and magnetically. The core of these compounds comprises a central Mn2O2 rhombus to which two terminal ions are attached - one to each oxo bridge. There are two types of bridges that alternately bind the central and terminal ions, those having a triple (μ-O)(μ-RCOO)2 or a double (μ-O)(μ-RCOO) bridge. The fit of the magnetic data of analogous compounds has so far been performed considering two different magnetic interactions, that between central ions (J1) and those between terminal and central ions (Jct), leading to ground states with ST = 2 or 3, or to five energetically degenerate ground states with ST = 0-4, depending on the J1/Jct ratio. In contrast, the compounds presented herein show an isolated ST = 0 ground state, and it was necessary to distinguish the two types of magnetic interactions between central and terminal ions (J2 and J3) to achieve a good fit of the experimental data. The differentiation of these interactions causes a spin state redistribution: the degeneration of ST = 0-4 breaks and the states with ST ≠ 0 become unstable as J2 and J3 become more different. Nevertheless, the assignment of these states to a particular spin configuration was unachievable because the composition of these states changes upon decreasing the J3/J2 ratio. The importance of considering the relative orientation of Jahn-Teller axes is also highlighted.
publishDate 2017
dc.date.none.fl_str_mv 2017
2020
2020
2020
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/acceptedVersion
format article
status_str acceptedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/2445/163397
url https://hdl.handle.net/2445/163397
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Versió postprint del document publicat a: https://doi.org/10.1039/C6NJ03845J
New Journal of Chemistry, 2017, vol. 41, num. 8, p. 2934-2940
https://doi.org/10.1039/C6NJ03845J
dc.rights.none.fl_str_mv (c) Escriche Tur, Luis et al., 2017
info:eu-repo/semantics/openAccess
rights_invalid_str_mv (c) Escriche Tur, Luis et al., 2017
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 22 p.
application/pdf
dc.publisher.none.fl_str_mv Royal Society of Chemistry
publisher.none.fl_str_mv Royal Society of Chemistry
dc.source.none.fl_str_mv Articles publicats en revistes (Mineralogia, Petrologia i Geologia Aplicada)
reponame:Recercat. Dipósit de la Recerca de Catalunya
instname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
instname_str Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
reponame_str Recercat. Dipósit de la Recerca de Catalunya
collection Recercat. Dipósit de la Recerca de Catalunya
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,811543

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