Journal of the Brazilian Chemical Society | |
Synthesis, structural and magnetic characterization of a new copper(II)-nitronyl nitroxide radical complex | |
Vaz, Maria G. F.1  Università degli Studi di Firenze, Sesto Fiorentino, Italy1  Novak, Miguel A.1  Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil1  Caneschi, Andrea1  Florencio, Antonio S.1  Marguerite, Kalisz1  Chapuis, Gervais1  Universidade Federal Fluminense, Niterói, Brazil1  Pinheiro, Carlos B.1  École Polytechnique Fédérale de Lausanne, Lausanne, Switzerland1  | |
关键词: molecular magnetism; coordination complexes; nitronyl nitroxide radical; | |
DOI : 10.1590/S0103-50532007000500007 | |
学科分类:化学(综合) | |
来源: SciELO | |
【 摘 要 】
In this work we describe the structure and the magnetic properties of a new copper(II)-NIT complex, where NIT stands for nitronyl nitroxide radical. This was achieved using (NBu4)4[Cu2(bopba)] as a precursor (where NBu4+ is the tetrabutylammonium cation and bopba is bis-o-phenylenebis(oxamate)), whose crystal structure was resolved and its magnetics properties studied. From the reaction of this precursor with a cationic nitronyl nitroxide radical, a new compound was prepared and magnetically characterized, namely (pEtRad)4[Cu2(bopba)] (where pEtRad+ stands for the cationic para-2-(4-pyridil)-4,4,5,5-tetramethylimidazoline-1 -oxyl-3-oxide radical). The magnetic properties suggest that in this six-spin complex there is a competition between short range ferromagnetic and antiferromagnetic interactions. The ferromagnetic interaction can be explained by the orthogonality of the involved magnetic orbitals.
【 授权许可】
Unknown
【 预 览 】
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RO201912050580218ZK.pdf | 285KB | download |