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  • Title: Structures with tunable strong ferromagnetic coupling: from unordered (1D) to ordered (Discrete).
    Author: Zeng YF, Zhao JP, Hu BW, Hu X, Liu FC, Ribas J, Ribas-Ariño J, Bu XH.
    Journal: Chemistry; 2007; 13(35):9924-30. PubMed ID: 17853517.
    Abstract:
    The X-ray crystal structures, magnetic susceptibilities from 2 to 300 K, and theoretical analyses of the magnetism for 1D and trinuclear azido Cu(II) carboxylate complexes [Cu(1.5)(hnta)(N(3))(2)(H(2)O)](n) (1) and [Cu(3)(hnta)(4)(N(3))(2)(H(2)O)(3)] (2), respectively, where hnta is 6-hydroxynicotinate, are described. Although both exhibit strong ferromagnetic coupling, discrete complex 2 exhibits long-range ferromagnetic ordering, while the very similar 1D system 1 does not. Density functional calculations provided accurate J values and allowed rationalization of the ferromagnetic coupling in terms of the magnetic orbitals and spin densities.
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