Structures with tunable strong ferromagnetic coupling: from unordered (1D) to ordered (Discrete).
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.
Zeng
Yong-Fei
YF
Department of Chemistry, Nankai University, Tianjin, China.
Zhao
Jiong-Peng
JP
Hu
Bo-Wen
BW
Hu
Xin
X
Liu
Fu-Chen
FC
Ribas
Joan
J
Ribas-Ariño
Jordi
J
Bu
Xian-He
XH