A Co(II) 1D coordination polymer constructed from 1,3-bisbenzyl-2-oxoimidazoline-4,5-dicarboxylic acid: crystal structure and magnetic properties

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dc.creatorFelipe Mageste Scaldini
dc.creatorMaria Clara Ramalho Freitas
dc.creatorMário de Souza Reis Junior
dc.creatorMaria Irene Yoshida
dc.creatorKlaus Wilhelm Heinrich Krambrock
dc.creatorFlávia Cavalieri Machado
dc.date.accessioned2022-11-10T16:17:09Z
dc.date.accessioned2025-09-09T00:59:54Z
dc.date.available2022-11-10T16:17:09Z
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.sponsorshipINCT – Instituto nacional de ciência e tecnologia (Antigo Instituto do Milênio)
dc.description.sponsorshipFAPERJ - Fundação Carlos Chagas Filho de Amparo à Pesquisa do Estado do Rio de Janeiro
dc.identifier.doihttps://doi.org/10.1039/c7nj04564f
dc.identifier.issn13699261
dc.identifier.urihttps://hdl.handle.net/1843/47135
dc.languageeng
dc.publisherUniversidade Federal de Minas Gerais
dc.relation.ispartofNew Journal of Chemistry
dc.rightsAcesso Restrito
dc.subjectPolímeros
dc.subject.otherCoordination polymer
dc.titleA Co(II) 1D coordination polymer constructed from 1,3-bisbenzyl-2-oxoimidazoline-4,5-dicarboxylic acid: crystal structure and magnetic properties
dc.typeArtigo de periódico
local.citation.epage1222
local.citation.issue2
local.citation.spage1216
local.citation.volume42
local.description.resumoA new complex involving 1,3-bisbenzyl-2-oxoimidazoline-4,5-dicarboxylic acid (H2L) and a cobalt(II) metal ion designated [Co(L)(H2O)2]n has been synthesized under solvothermal conditions and characterized by elemental analyses, IR spectra, thermogravimetric analysis, single crystal X-ray diffraction and magnetization. The new compound crystallizes as pink crystals in an orthorhombic system with space group Pbca. A unit cell with 8 asymmetric units is present, each containing a Co(II) center with distorted octahedral geometry and a coordination sphere consisting of one nitrogen and five oxygen ligands. Bridging carboxylate groups are responsible for the formation of a 1D polymer. Adjacent chains are connected through OH⋯O hydrogen bonds involving coordinated water molecules leading to the formation of supramolecular arrangement. Low-temperature electron paramagnetic resonance (EPR) measurements identified that Co ions are in the divalent charge state in orthorhombic or less symmetry in high-spin (HS) configuration with principal values of g tensor of g1 = 5.5(2), g2 = 3.0(2) and g3 = 2.0(1). Magnetic susceptibility measurements as a function of temperature were analyzed by the standard Curie–Weiss law including diamagnetic contributions. Magnetic data were consistently explained by HS configuration of Co2+ ions with very small contribution of anti-ferromagnetic coupling.
local.identifier.orcidhttps://orcid.org/0000-0002-6202-5970
local.identifier.orcidhttps://orcid.org/0000-0002-7562-0285
local.publisher.countryBrasil
local.publisher.departmentICX - DEPARTAMENTO DE FÍSICA
local.publisher.departmentICX - DEPARTAMENTO DE QUÍMICA
local.publisher.initialsUFMG
local.url.externahttps://pubs.rsc.org/en/content/articlelanding/2018/NJ/C7NJ04564F

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