Please use this identifier to cite or link to this item:
http://hdl.handle.net/1843/47135| Type: | Artigo de Periódico |
| Title: | A Co(II) 1D coordination polymer constructed from 1,3-bisbenzyl-2-oxoimidazoline-4,5-dicarboxylic acid: crystal structure and magnetic properties |
| Authors: | Felipe Mageste Scaldini Maria Clara Ramalho Freitas Mário de Souza Reis Junior Maria Irene Yoshida Klaus Wilhelm Heinrich Krambrock Flávia Cavalieri Machado |
| Abstract: | A 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. |
| Subject: | Polímeros |
| language: | eng |
| metadata.dc.publisher.country: | Brasil |
| Publisher: | Universidade Federal de Minas Gerais |
| Publisher Initials: | UFMG |
| metadata.dc.publisher.department: | ICX - DEPARTAMENTO DE FÍSICA ICX - DEPARTAMENTO DE QUÍMICA |
| Rights: | Acesso Restrito |
| metadata.dc.identifier.doi: | https://doi.org/10.1039/c7nj04564f |
| URI: | http://hdl.handle.net/1843/47135 |
| Issue Date: | 2018 |
| metadata.dc.url.externa: | https://pubs.rsc.org/en/content/articlelanding/2018/NJ/C7NJ04564F |
| metadata.dc.relation.ispartof: | New Journal of Chemistry |
| Appears in Collections: | Artigo de Periódico |
Files in This Item:
There are no files associated with this item.
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.