Structural versatility driven by the flexible di(4-pyridyl) sulfide ligand: From cobalt(II) single-ion magnets to sheet-like copper(II) weak antiferromagnets

Autor(es):Mostrar menos -

Reis, V, Natalia ; Marinho, Maria Vanda ^[1] ; Simoes, Tatiana Renata G. ^[2] ; Metz, Karina C. ^[2] ; Vaz, Raphael C. A. ^[3] ; Oliveira, Willian X. C. ^[3] ; Pereira, Cynthia L. M. ^[3] ; Barros, Wdeson P. ^[4] ; Pinheiro, Carlos B. ^[5] ; Giese, Siddhartha O. K. ^[2] ; Hughes, David L. ^[6] ; Pirota, Kleber R. ^[7] ; Nunes, Wallace C. ^[8] ; Stumpf, Humberto O. ^[3]

Afiliação do(s) autor(es)

^[1] Univ Fed Alfenas, Inst Quim, BR-37130001 Alfenas, MG - Brazil

^[2] Univ Fed Parana, Dept Quim, BR-81531980 Curitiba, Parana - Brazil

^[3] Reis, Natalia, V, Univ Fed Minas Gerais, Dept Quim, ICEx, BR-31270901 Belo Horizonte, MG - Brazil

^[4] Univ Estadual Campinas, Inst Quim, BR-13083970 Campinas, SP - Brazil

^[5] Univ Fed Minas Gerais, Dept Fis, ICEx, BR-31270901 Belo Horizonte, MG - Brazil

^[6] Univ East Anglia, Sch Chem, Norwich NR4 7TJ, Norfolk - England

^[7] Univ Estadual Campinas, Inst Fis Gleb Wataghin, Dept Fis Mat Condensada, BR-13083970 Campinas, SP - Brazil

^[8] Univ Fed Fluminense, Inst Fis, Av Gal Milton Tavares de Souza S-N, BR-24210346 Niteroi, RJ - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Polyhedron; v. 171, p. 203-211, OCT 1 2019.
• Citações Web of Science: 1

Resumo

The reaction between the ligand di(4-pyridyl)sulfide (dps) and two salts of divalent first row transition metals (M = Co2+, and Cu2+) resulted in three new compounds with formula: {[}Co(dps)(4)(H2O)(2)](ClO4)(2)center dot H2O (1), {[}Cu(dps)(2)(dmso)(2)](n)(ClO4)(2n) (2) and {[}[Cu(dps)(2)(dmso)(2)][Cu(dps)(2)(dmso)(H2O)]](n)(ClO4)(4n)center dot 2nH(2)O center dot n(dmso) (3). Crystal structures of 1-3 were determined using single-crystal X-ray diffraction. Crystal structure of 1 consists of a mononuclear complex, in which the dps ligand acts in a monodentate mode through one of the pyridyl nitrogen atoms. Compounds 2 and 3 present the dps ligands bridging metal centers leading to bidimensional coordination polymers. Magnetic properties in the polycrystalline samples of 1-3 in the 300-2 K temperature range were investigated. Complex 1 exhibits a field-induced slow magnetization behavior and behaves as a single-ion magnet with an effective energy barrier for the reversal of magnetization of 22.9 (1.1) K and tau(0) = 5.3(1.2) x 10(-7) s. (C) 2019 Elsevier Ltd. All rights reserved. (AU)

• Processo FAPESP: 15/22379-7 - Sistemas magnéticos moleculares multifuncionais: preparação e estudo das propriedades magnéticas, luminescentes e fotorreativas de complexos polinucleares contendo íons metálicos de transição e lantanídeos
• Beneficiário: Wdeson Pereira Barros
• Modalidade de apoio: Auxílio à Pesquisa - Regular