Structure and magnetism of catena-poly[copper(II)-μ-dichloro-l-lysine]hemihydrate: copper chains with monochloride bridges

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dc.creatorSantana, Ricardo Costa de
dc.creatorFerreira, Bruno N.
dc.creatorSabino, José Ricardo
dc.creatorCarvalho, Jesiel Freitas
dc.creatorPeña, Octavio
dc.creatorCalvo, Rafael
dc.date.accessioned2024-07-11T14:50:14Z
dc.date.available2024-07-11T14:50:14Z
dc.date.issued2012
dc.description.abstractWe report the preparation and characterization by elemental analysis, infrared (IR), single crystal X-ray diffraction, magnetic measurements and electron paramagnetic resonance (EPR) of the new compound catena-poly[copper(II)-l-dichloro-L-lysine]hemihydrate, with formula C6H14Cl2CuN2O2(H2O)0.5, here after called [Cu(lys)Cl2]. The compound crystallizes in the space group C2 with copper ions in a square pyramidal coordination, and the structure consists of zigzag chains along the b axis bridged by equatorial-apical chlorine bonds with Cu–Cu distance of 3.5414(4) Å, and a small Cu–Cl–Cu angle of 85.47(6). Magnetic susceptibility and isothermal magnetization curves reveals a weak antiferromagnetic interaction 2J = 0.30(2) cm1 supported by the Cu–Cl–Cu bridge connecting CuII neighbors in the chains. EPR spectra at 34.0 GHz were obtained in powdered samples and in a single crystal with B0 in three orthogonal planes. Assuming an axially symmetric molecular g-matrix, we obtained principal g-values g// = 2.2794(9) and g? ¼ 2:0489ð3Þ from the crystal g-matrix calculated using the observed angular variation of the EPR line position. The angular variation of the line width, largest along the chain direction, is attributed to dipolar couplings between CuII ions in the lattice. The magnetic and EPR results are discussed in terms of the exchange couplings.
dc.identifier.citationSANTANA, Ricardo C.; FERREIRA, Bruno N.; SABINO, José R.; CARVALHO, Jesiel F.; PEÑA, Octavio; CALVO, Rafael. Structure and magnetism of catena-poly[copper(II)-μ-dichloro-l-lysine]hemihydrate: copper chains with monochloride bridges. Polyhedron, Amsterdam, v. 47, p. 53-59, 2012. DOI: 10.1016/j.poly.2012.08.045. Disponível em: https://www.sciencedirect.com/science/article/pii/S0277538712006201Acesso em: 25 maio 2023.
dc.identifier.issn0277-5387
dc.identifier.issne- 1873-3719
dc.identifier.urihttps://www.sciencedirect.com/science/article/pii/S0277538712006201
dc.language.isoeng
dc.publisher.countryHolanda
dc.publisher.departmentInstituto de Física - IF (RMG)
dc.rightsAcesso Restrito
dc.subjectCopper
dc.subjectStructure
dc.subjectLysine
dc.subjectChlorine bridge
dc.subjectExchange interaction
dc.subjectMagnetic properties
dc.subjectEPR spectra
dc.titleStructure and magnetism of catena-poly[copper(II)-μ-dichloro-l-lysine]hemihydrate: copper chains with monochloride bridges
dc.typeArtigo

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