Structures with Tunable Strong Ferromagnetic Coupling: from Unordered (1D) to Ordered (Discrete)

✍ Scribed by Yong-Fei Zeng; Jiong-Peng Zhao; Bo-Wen Hu; Xin Hu; Fu-Chen Liu; Joan Ribas; Jordi Ribas-Ariño; Xian-He Bu

• Book ID: 101834471
• Publisher: John Wiley and Sons
• Year: 2007
• Tongue: English
• Weight: 453 KB
• Volume: 13
• Category: Article
• ISSN: 0947-6539
• DOI: 10.1002/chem.200700637

✦ Synopsis

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.