Exploring the exchange interaction in a mixed valence {CoII 4CoIII2} hexanuclear cluster with novel topology

Reaction between [Co2(μ-OH2)(μ-Piv) 2(Piv)2(HPiv)4] and a (salicylidene) ethanolamine ligand under ambient reaction conditions, affords hexanuclear complexes [CoIII2CoII4(Piv) 8(HPiv)2(L)2(OH)2] (1-2). Both products have been characterized crystallographically and found to be mixed-valent, containin...

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Detalles Bibliográficos
Autores principales:	Lazzarini, I.C., Carrella, L., Rentschler, E., Alborés, P.
Formato:	JOUR
Materias:	Cobalt polynuclear complexes Crystal structure DFT calculations Ferromagnetic Magnetic properties
Acceso en línea:	http://hdl.handle.net/20.500.12110/paper_02775387_v31_n1_p779_Lazzarini
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	todo:paper_02775387_v31_n1_p779_Lazzarini
record_format	dspace
spelling	todo:paper_02775387_v31_n1_p779_Lazzarini2023-10-03T15:16:10Z Exploring the exchange interaction in a mixed valence {CoII 4CoIII2} hexanuclear cluster with novel topology Lazzarini, I.C. Carrella, L. Rentschler, E. Alborés, P. Cobalt polynuclear complexes Crystal structure DFT calculations Ferromagnetic Magnetic properties Reaction between [Co2(μ-OH2)(μ-Piv) 2(Piv)2(HPiv)4] and a (salicylidene) ethanolamine ligand under ambient reaction conditions, affords hexanuclear complexes [CoIII2CoII4(Piv) 8(HPiv)2(L)2(OH)2] (1-2). Both products have been characterized crystallographically and found to be mixed-valent, containing divalent and trivalent Co centers. Down to 30 K, the variable-temperature magnetic susceptibility data are dominated by the single-ion properties of high spin Co(II) centers with distorted-octahedral coordination geometries. Below this temperature, the effect of intramolecular ferromagnetic exchange interactions becomes apparent. Magnetic data has been analyzed in terms of ground isolated effective S̃=1/2Kramers doublets where low temperature magnetization data suggests an anisotropic behavior. We have also employed DFT-broken symmetry calculations to evaluate in an isotropic approach the exchange interaction pathways. © 2011 Elsevier Ltd. All rights reserved. Fil:Alborés, P. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_02775387_v31_n1_p779_Lazzarini
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	Cobalt polynuclear complexes Crystal structure DFT calculations Ferromagnetic Magnetic properties
spellingShingle	Cobalt polynuclear complexes Crystal structure DFT calculations Ferromagnetic Magnetic properties Lazzarini, I.C. Carrella, L. Rentschler, E. Alborés, P. Exploring the exchange interaction in a mixed valence {CoII 4CoIII2} hexanuclear cluster with novel topology
topic_facet	Cobalt polynuclear complexes Crystal structure DFT calculations Ferromagnetic Magnetic properties
description	Reaction between [Co2(μ-OH2)(μ-Piv) 2(Piv)2(HPiv)4] and a (salicylidene) ethanolamine ligand under ambient reaction conditions, affords hexanuclear complexes [CoIII2CoII4(Piv) 8(HPiv)2(L)2(OH)2] (1-2). Both products have been characterized crystallographically and found to be mixed-valent, containing divalent and trivalent Co centers. Down to 30 K, the variable-temperature magnetic susceptibility data are dominated by the single-ion properties of high spin Co(II) centers with distorted-octahedral coordination geometries. Below this temperature, the effect of intramolecular ferromagnetic exchange interactions becomes apparent. Magnetic data has been analyzed in terms of ground isolated effective S̃=1/2Kramers doublets where low temperature magnetization data suggests an anisotropic behavior. We have also employed DFT-broken symmetry calculations to evaluate in an isotropic approach the exchange interaction pathways. © 2011 Elsevier Ltd. All rights reserved.
format	JOUR
author	Lazzarini, I.C. Carrella, L. Rentschler, E. Alborés, P.
author_facet	Lazzarini, I.C. Carrella, L. Rentschler, E. Alborés, P.
author_sort	Lazzarini, I.C.
title	Exploring the exchange interaction in a mixed valence {CoII 4CoIII2} hexanuclear cluster with novel topology
title_short	Exploring the exchange interaction in a mixed valence {CoII 4CoIII2} hexanuclear cluster with novel topology
title_full	Exploring the exchange interaction in a mixed valence {CoII 4CoIII2} hexanuclear cluster with novel topology
title_fullStr	Exploring the exchange interaction in a mixed valence {CoII 4CoIII2} hexanuclear cluster with novel topology
title_full_unstemmed	Exploring the exchange interaction in a mixed valence {CoII 4CoIII2} hexanuclear cluster with novel topology
title_sort	exploring the exchange interaction in a mixed valence {coii 4coiii2} hexanuclear cluster with novel topology
url	http://hdl.handle.net/20.500.12110/paper_02775387_v31_n1_p779_Lazzarini
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Exploring the exchange interaction in a mixed valence {CoII 4CoIII2} hexanuclear cluster with novel topology

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