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http://hdl.handle.net/1843/49380| Type: | Artigo de Periódico |
| Title: | Alkaline ion-modulated solid-state supramolecular organization in mixed organic/metallorganic compounds based on 1,1'-ethylenebis(4-aminopyridinium) cations and bis(oxamate)cuprate(ii) anions |
| Authors: | Tamyris Teixeira da Cunha Willian Xerxes Coelho Oliveira Carlos Basílio Pinheiro Emerson Fernandes Pedroso Wallace Castro Nunes Cynthia Lopes Martins Pereira |
| Abstract: | Three new coordination compounds of formula (edap)2[Cu(opba)]2·4H2O (1), (edap)[{Na2(H2O)4}{Cu2(opba)2}]·2H2O (2), and (edap)[{K2(H2O)2}{Cu2(opba)2}]·3H2O (3) (edap = 1,1′-ethylenebis(4-aminopyridinium) and opba = 1,2-phenylenebis(oxamate)) were synthesized through the metathesis reaction involving A2[Cu(opba)] (A = Li+, Na+, and K+) and (edap)Cl2·2H2O. Crystal structures of 1–3 and edap(IO3)2·4H2O compound were elucidated by single crystal X-ray diffraction. Compounds 1–3 are built up from dinuclear copper(II) entities, {[Cu(opba)]2}4– with an asymmetric bis(monatomic oxygen) bridge resulting from the parallel “out-of-plane” disposition of the planar mononuclear [Cu(opba)]²–. They possess distinct supramolecular arrangements of varying dimensionality (nD with n = 0 (1), 1 (2), and 2 (3)) in the solid state depending on the nature of the coordinated alkaline ion present alongside edap²+ counterions. While the {[Cu(opba)]2}4– building blocks are well-isolated in 1, they form either double chains or corrugated layers due to the coordination of the Na+ or K+ ions in 2 and 3, respectively. Magnetic properties of 1–3 show a very weak antiferromagnetic coupling between the Cu II ions through a double monatomic (μ-O) bridge (−J = 1.63(9) (1), 2.29(2) (2), and 1.65(3) cm–¹ (3)), the Hamiltonian being defined as H = −(S1·S2) + g βH(S1 + S2). |
| Subject: | Química supramolecular Cristalografia Cristalografia de raio X Cristais Propriedades magnéticas Forças intermoleculares Compostos de coordenação Antiferromagnetismo Cátions Íons |
| 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/10.1021/acs.cgd.5b01453 |
| URI: | http://hdl.handle.net/1843/49380 |
| Issue Date: | 2016 |
| metadata.dc.url.externa: | https://pubs.acs.org/doi/10.1021/acs.cgd.5b01453 |
| metadata.dc.relation.ispartof: | Crystal Growth & Design |
| Appears in Collections: | Artigo de Periódico |
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