Heterobimetallic one-dimensional coordination polymers MICuII (M = Li and K) based on ferromagnetically coupled Di- and tetracopper(II) metallacyclophanes

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dc.creatorTamyris Teixeira da Cunha
dc.creatorWillian Xerxes Coelho Oliveira
dc.creatorEmerson Fernandes Pedroso
dc.creatorFrancesc Lloret
dc.creatorMiguel Julve
dc.creatorCynthia Lopes Martins Pereira
dc.date.accessioned2023-01-24T19:01:51Z
dc.date.accessioned2025-09-09T00:26:55Z
dc.date.available2023-01-24T19:01:51Z
dc.date.issued2018
dc.description.sponsorshipCNPq - Conselho Nacional de Desenvolvimento Científico e Tecnológico
dc.description.sponsorshipFAPEMIG - Fundação de Amparo à Pesquisa do Estado de Minas Gerais
dc.description.sponsorshipCAPES - Coordenação de Aperfeiçoamento de Pessoal de Nível Superior
dc.description.sponsorshipOutra Agência
dc.identifier.doihttps://doi.org/10.3390/magnetochemistry4030038
dc.identifier.issn2312-7481
dc.identifier.urihttps://hdl.handle.net/1843/49116
dc.languageeng
dc.publisherUniversidade Federal de Minas Gerais
dc.relation.ispartofMagnetochemistry
dc.rightsAcesso Aberto
dc.subjectMagnetoquímica
dc.subjectCristalografia
dc.subjectPropriedades magnéticas
dc.subjectMateriais magnéticos
dc.subject.otherOxamate
dc.subject.otherCopper(II)
dc.subject.otherCrystal engineering
dc.subject.otherSpin polarization
dc.subject.otherFerromagnetic coupling
dc.subject.otherCoordination polymers
dc.titleHeterobimetallic one-dimensional coordination polymers MICuII (M = Li and K) based on ferromagnetically coupled Di- and tetracopper(II) metallacyclophanes
dc.typeArtigo de periódico
local.citation.issue3
local.citation.volume4
local.description.resumoThe synthesis, crystal structure and magnetic properties of the coordination polymers of formula [EDAP{Li6(H2O)8[(Cu2(μ-mpba)2)2(H2O)2]}]n (1) and [(EDAP)2{K(H2O)4[Cu2(μ-mpba)2(H2O)2]}Cl·2H2O]n (2), in which mpba = N,N′-1,3-phenylenebis(oxamate) and EDAP²+ = 1,1′-ethylenebis(4-aminopyridinium) are described. Both compounds have in common the presence of the [Cu2(mpba)2]4− tetraanionic unit which is a [3,3] metallacyclophane motif in which the copper(II) ions are five-coordinate in a distorted square pyramidal surrounding. The complex anion in 1 is dimerized through double out-of-plane copper to outer carboxylate-oxygen atoms resulting in the centrosymmetric tetracopper(II) fragment [Cu4(μ-mpba)4(H2O)2]8− which act as a ligand toward six hydrated lithium(I) cations leading to anionic ladder-like double chains whose charge is neutralized by the EDAP²+ cations. In the case of 2, each dicopper(II) entity acts as a ligand towards tetraquapotassium(I) units to afford anionic zig zag single chains of formula {K(H2O)4[Cu2(μ-mpba)2(H2O)2]}n³n− plus EDAP²+ cations and non-coordinate chloride anions. Cryomagnetic measurements on polycrystalline samples 1 and 2 show the occurrence of ferromagnetic interactions between the copper(II) ions across the –Namidate–(C–C–C)phenyl–Namidate– exchange pathway [J = +10.6 (1) and +8.22 cm−¹ (2)] and antiferromagnetic ones through the double out-of-plane carboxylate-oxygen atoms [j = −0.68 cm−¹ (1), the spin Hamiltonian being defined as H=−J(SCu1⋅SCu2+SCu2i⋅SCu1i)−j(SCu2⋅SCu2i)].
local.identifier.orcidhttps://orcid.org/0000-0002-3224-2624
local.identifier.orcidhttps://orcid.org/0000-0003-0722-5352
local.identifier.orcidhttps://orcid.org/0000-0001-8379-6638
local.identifier.orcidhttps://orcid.org/0000-0001-9006-8268
local.identifier.orcidhttps://orcid.org/0000-0002-3799-8092
local.publisher.countryBrasil
local.publisher.departmentICX - DEPARTAMENTO DE QUÍMICA
local.publisher.initialsUFMG
local.url.externahttps://www.mdpi.com/2312-7481/4/3/38

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